Calculators
Financial calculators, percentage, ROI & math tools.
Health, Fitness & Clinical Calculators
31 Tools AvailableBMI Calculator
Calculate Body Mass Index (BMI) for men, women, and adults based on WHO and CDC standards with healthy weight ranges.
Calorie Calculator
Calculate daily caloric intake for weight loss, maintenance, or muscle gain using the Mifflin-St Jeor equation.
Body Fat Percentage Calculator
Calculate body fat percentage online using the official U.S. Navy tape measure standard with body composition, healthy ranges, and calorie goals.
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) across Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle formulas.
Macro Calculator
Calculate optimal macronutrient ratios (protein, carbohydrates, and fats) for cutting, bulking, or maintenance.
Ideal Weight Calculator
Compare your ideal healthy body weight across Robinson, Miller, Devine, and Hamwi clinical medical formulas.
Pregnancy Calculator
Calculate baby due date, current gestational age, and developmental trimester milestones.
Pregnancy Weight Gain Calculator
Track healthy pregnancy weight gain targets week-by-week based on Institute of Medicine (IOM) standards.
Pregnancy Conception Calculator
Estimate the probable date of conception and fertile intercourse window based on due date or last period.
Due Date Calculator
Calculate your estimated baby delivery date using LMP, conception date, or IVF embryo transfer.
Pace Calculator
Calculate running pace, finish time, or distance for 5K, 10K, half marathon, and marathon training splits.
Army Body Fat Calculator
Calculate body fat percentage and AR 600-9 compliance using the official U.S. Army circumference tape test standard.
Carbohydrate Calculator
Calculate daily carbohydrate requirements in grams and calories based on diet type and activity level.
Lean Body Mass Calculator
Calculate lean body mass (LBM) and fat-free tissue using Boer, James, and Hume clinical formulas.
Healthy Weight Calculator
Discover your optimal healthy weight range and target goal based on World Health Organization standards.
Calories Burned Calculator
Calculate calories burned during workouts, running, cycling, swimming, and strength training using MET values.
One Rep Max Calculator (1RM Calculator for Bench, Squat & Deadlift)
Calculate your One Rep Max (1RM) for bench press, squat, deadlift, and overhead press. Features Epley, Brzycki, and Lander formulas, training weight zones, rep max matrix, and warm-up pyramids.
Target Heart Rate Calculator
Calculate 5 training heart rate zones using the Karvonen formula and Tanaka HRmax for cardio conditioning.
Protein Calculator
Calculate daily protein intake for muscle gain, bodybuilding, fat loss, or maintenance in grams.
Fat Intake Calculator
Calculate optimal daily dietary fat grams, heart-healthy unsaturated ratios, and saturated fat safety ceilings.
TDEE Calculator
Calculate Total Daily Energy Expenditure (TDEE) and BMR with Mifflin-St Jeor and Katch-McArdle formulas.
Ovulation Calculator
Predict your most fertile days, peak ovulation window, and next cycle start based on menstrual history.
Period Calculator
Track your menstrual cycle, forecast upcoming period dates, and identify PMS symptom onset windows.
GFR Calculator
Calculate Glomerular Filtration Rate (eGFR) and Chronic Kidney Disease stages using CKD-EPI 2021 and MDRD formulas.
Body Type Calculator
Determine female body shapes (Hourglass, Pear, Spoon, Inverted Triangle, Rectangle) and Waist-to-Hip health ratios.
Body Surface Area Calculator
Calculate human Body Surface Area (BSA) in m² and ft² using Mosteller, Du Bois, Haycock, and Schlich formulas.
BAC Calculator
Calculate Blood Alcohol Concentration (BAC %), legal driving status, and estimated time until complete sobriety.
Anorexic BMI Calculator
Screen for low body weight using DSM-5 anorexia severity tiers, BMI percentiles, and healthy weight ranges.
Weight Watchers Points Calculator
Estimate SmartPoints, PointsPlus, and Classic WW points from food nutrition values, plus daily target allowances.
Overweight Calculator
Assess overweight status, calculate excess weight in kg/lbs, and view projected timelines to normal BMI.
How Much Water to Drink a Day Calculator
Calculate exactly how much water you should drink per day based on your body weight, age, activity level, climate, and diet.
Financial, Math & Everyday Calculators
151 Tools AvailableTire Size Calculator & Comparison Tool
Calculate tire dimensions, sidewall height, overall diameter, circumference, revs per mile, and speedometer calibration difference.
Roofing Calculator - Squares, Shingle Bundles & Cost
Calculate roofing squares, shingle bundles, underlayment felt rolls, roof pitch slope factor, and total material & labor cost.
Tile Calculator - Floor & Wall Tile Box Estimator
Calculate tile quantities, full box counts, grout line spacing, waste allowance, and material cost for floors, bathrooms, and backsplashes.
Mulch Calculator - Cubic Yards & Bag Estimator
Calculate cubic yards, cubic meters, bag counts (2 cu ft & 3 cu ft), and cost for landscaping garden beds and tree rings.
Gravel Calculator - Tons, Cubic Yards & Driveways
Calculate gravel tonnage, cubic yards, aggregate density presets (Crushed stone, Pea gravel, River rock, Road base), and project cost.
Wind Chill Calculator - NWS Index & Frostbite Time
Calculate the official National Weather Service (NWS) wind chill temperature index, feels-like cold, and frostbite danger exposure time.
Heat Index Calculator - Humidex & Heat Illness Risk
Calculate apparent 'feels like' temperature from air temperature and relative humidity with NOAA heat disorder danger alerts.
Dew Point Calculator - Humidity & Vapor Pressure
Solve for Dew Point, Relative Humidity, or Air Temperature using the Magnus-Tetens formula with vapor pressure and comfort index.
Bandwidth Calculator - Download Time & Hosting Traffic
Calculate download/upload durations, website monthly bandwidth sizing, GB/month to Mbps port speed, and data unit conversions.
Day Counter - Business Days & Date Duration
Count total days, working / business days, and weekends between two dates or add/subtract business days from any date.
Day of the Week Calculator - Historical Date Finder
Find what day of the week any date was or will be with Zeller's Congruence, Doomsday rule, ISO week numbers, and zodiac signs.
GDP Calculator - Gross Domestic Product & Per Capita
Calculate Gross Domestic Product (GDP) using Expenditure (C+I+G+NX) and Resource Income approaches with real GDP and per capita metrics.
Gas Mileage Calculator - MPG, Fuel Economy & Gas Cost
Calculate vehicle fuel economy in Miles Per Gallon (MPG US & UK), Liters per 100km (L/100km), km/L, and compare annual gas savings between cars.
Horsepower Calculator - HP, Torque, RPM & Power Converter
Calculate mechanical horsepower from torque and engine RPM, work & time physical definition, or convert across kW, metric PS, and BTU/hr.
Engine Horsepower Calculator - 1/4-Mile ET & Trap Speed
Estimate engine crank and wheel horsepower (BHP/WHP) from quarter-mile drag strip elapsed times (ET), trap speeds, and vehicle curb weight.
Stair Calculator - Riser, Tread, Stringer & 2D Blueprint
Calculate stair riser height, tread run, stringer length, staircase angle, and IRC building code compliance with an interactive 2D blueprint.
Resistor Calculator - 4, 5, 6-Band Color Code & Circuits
Decode 4-band, 5-band, and 6-band resistor color codes with live interactive SVG resistor, and calculate parallel/series circuits and wire resistance.
Ohm's Law Calculator - Voltage, Current, Resistance & Power
Solve Ohm's Law and Joule's Power Law (V, I, R, P) with an interactive 12-formula circular electrical power wheel diagram.
Electricity Cost Calculator - kWh & Appliance Energy Usage
Calculate appliance electrical energy usage in kWh and forecast electricity bill costs per hour, day, month, and year.
Shoe Size Conversion Calculator - US, UK, EU, JP & Foot Length
Convert shoe sizes between US & Canada, UK & India, Europe (EU), Japan (Mondopoint cm), and foot length in inches and centimeters.
Tip Calculator - Gratuity, Split Bill & Rounding Options
Calculate restaurant gratuity, tip percentage presets, split bills among party guests, and apply dollar rounding with multi-currency support.
Mileage Calculator - Driving Distance, Travel Time & Gas Cost
Calculate highway driving distance between major US cities, estimated travel duration, fuel consumed, and gas budget with currency selection.
Density Calculator - ρ = m / V, Mass, Volume & Specific Gravity
Calculate density, mass, or volume (ρ = m / V) with material presets, specific gravity vs water, and multi-unit conversions.
Mass Calculator - Volume, Density, F = ma & E = mc²
Calculate physical mass from geometric body volume and density, Newton's second law (F = ma), or Einstein's mass-energy equivalence.
Weight Calculator - Mass vs. Weight & Solar System Planets
Convert between mass and weight units and calculate your exact weight on the Moon, Mars, Jupiter, and across the solar system.
Speed Calculator - Distance, Speed, Time & Running Pace
Solve for speed, distance, or travel time (s = d / t) with running pace conversions and supersonic/cosmic velocity benchmark comparisons.
Molarity Calculator - Mass, Concentration & Dilution (M1V1=M2V2)
Calculate solute mass, solution molarity (M), and stock solution dilutions (M₁V₁ = M₂V₂) with common chemical reagent presets.
Molecular Weight Calculator - Molar Mass & Chemical Formula
Parse chemical formulas (e.g. C6H12O6, CuSO4·5H2O), calculate molar mass (g/mol), and analyze elemental mass percent composition.
Golf Handicap Calculator - Course Handicap & USGA WHS Index
Calculate Course Handicap and Playing Handicap for any tee, or compute your official USGA World Handicap System (WHS) index from 20-round score history.
Sleep Calculator - 90-Minute Sleep Cycles & Optimal Bedtime
Calculate optimal bedtimes and wake-up times based on natural 90-minute ultradian sleep cycles to wake up energized without morning grogginess.
Age Calculator - Chronological Age & Birthday Countdown
Calculate exact chronological age in years, months, weeks, days, hours, minutes, and seconds with next birthday countdown.
Time Calculator - Add, Subtract & Expression Parser
Add, subtract, and evaluate time durations in days, hours, minutes, and seconds, or calculate forward/backward from dates.
GPA Calculator - College, High School & Target Planner
Calculate semester, cumulative, weighted, and unweighted 4.0/4.3/5.0 GPA and plan future grades to achieve academic targets.
Height Calculator - Child Adult Height Predictor
Predict a child's adult height using the clinical Khamis-Roche and Mid-Parental Tanner formulas with imperial & metric converters.
IP Subnet Calculator - IPv4 & IPv6 CIDR / Netmask
Calculate IPv4 and IPv6 subnets, network IDs, broadcast addresses, usable host ranges, wildcard masks, and binary breakdowns.
Random Password Generator - Secure & High Entropy
Generate cryptographically secure, high-entropy random passwords and PINs completely on-device without internet transmission.
Voltage Drop Calculator - NEC Wire Size & Distance
Calculate electrical voltage drop, wire resistance, and terminal voltage for AC single/three-phase and DC circuits per NEC standards.
Square Footage Calculator - Room Area & Material Cost
Calculate square footage and material costs for rectangles, borders, circles, rings, triangles, and trapezoids with waste margins.
Starbucks Calorie Calculator - Nutrition, Macros & Custom Drinks
Calculate calories, macros (fat, carbs, protein), sugar, and caffeine for any custom Starbucks drink, milk choice, syrup pumps, and cold foam in real time.
Time Zone Calculator - World Clock & Time Difference
Convert time between major world time zones across UTC, EST, CST, PST, GMT, CET, IST, JST, and AEST with day/night indicators.
Date Calculator - Days Between Dates & Add/Subtract Days
Calculate exact days, business working days, weeks, months, and years between two calendar dates, or add/subtract time from a date.
Hours Calculator - Time Between Times & Break Deduction
Calculate total hours and minutes between clock times with unpaid break deductions and multi-day calendar spans.
Grade Calculator - Weighted Average & Final Exam Target
Calculate weighted course grades, assignment averages, and determine the exact score needed on your final exam to get your target grade.
Concrete Calculator - Slabs, Footings, Bags & Cost
Estimate concrete volume in cubic yards, cubic meters, and pre-mixed bag counts (40lb, 60lb, 80lb) for slabs, piers, and stairs.
Bra Size Calculator - Accurate 6-Point Fitting & Sister Sizes
Determine your true bra size across US, UK, EU, FR, and AU standards using the accurate 6-measurement fitting method with sister sizes.
Virtual Dice Roller - 3D Polyhedral d4 to d100 & D&D
Roll virtual polyhedral dice (d4, d6, d8, d10, d12, d20, d100) or custom sided dice with modifiers, roll history, and probability stats.
Fuel Cost Calculator - Trip Gas Expense & Carpool Split
Calculate trip gas expenses based on distance, vehicle MPG or L/100km, fuel price, round trips, and multi-passenger carpool splits.
BTU Calculator - AC Room Cooling & Heating Load Sizing
Calculate required BTU cooling and heating load capacity for rooms and whole houses based on area, ceiling height, sunlight, and insulation.
Time Card Calculator - Weekly Timesheet & Overtime Pay
Calculate weekly employee work hours, unpaid lunch breaks, regular pay, and overtime wages (1.5x/2.0x) with printable timesheets.
Love Calculator - Compatibility & Affinity Test
Calculate love compatibility score, romantic chemistry, communication harmony, and zodiac affinity between two names.
Scale Calculator & Scale Bar Generator
Calculate scale dimensions, convert 1:X model ratios, architectural scales, and generate downloadable vector scale bars online.
Scale Bar Generator
Generate custom graphical scale bars for architectural blueprints, maps, diagrams, and CAD drawings with SVG, PNG, and DXF download.
Paper Scale & Magnification Calculator
Compare international paper sizes (ISO A, ISO B, ANSI, Arch) and calculate linear magnification, reduction, and area scaling percentages.
Dental Implants Cost Calculator
Free dental implants cost calculator. Estimate total out-of-pocket prices, monthly financing, bone grafting, extractions, and All-on-4 pricing by region.
Percentage Calculator
Calculate percentage differences, percentage increase/decrease, and fractions quickly.
Number Base Changer
Convert numbers instantly between Binary (Base 2), Octal (Base 8), Decimal (Base 10), and Hexadecimal (Base 16).
Mortgage Calculator
Compute mortgage payment formula, monthly principal, interest, taxes, insurance, and PMI breakdown.
Auto Loan Calculator
Estimate monthly car payments, total interest, sales tax, down payment, and trade-in value on new or used vehicles.
Payment Calculator
Universal payment calculator for personal loans, credit cards, mortgages, and consumer financing across multiple payment frequencies.
Amortization Calculator
Calculate loan amortization schedules with extra monthly and annual payments, interest saved, and payoff date.
Currency Calculator
Real-time foreign exchange currency converter supporting USD, EUR, GBP, JPY, CAD, AUD, INR, CHF, and major world currencies.
Finance TVM Calculator
Time Value of Money (TVM) solver for Future Value (FV), Present Value (PV), and Periodic Payment (PMT).
Income Tax Calculator
Estimate US federal income taxes, FICA (Social Security & Medicare), effective tax rate, and take-home pay by filing status.
Salary Calculator
Convert hourly wages to annual salary, and view exact bi-weekly, semi-monthly, weekly, and daily earnings.
Loan Calculator
Calculate monthly payments, total repayment costs, and interest fees for personal loans, student loans, or business credit.
Interest Calculator
Compare simple interest vs compound interest growth, total earnings, and compounding advantage side by side.
Retirement Calculator
Calculate how much you need to save for retirement, projected nest egg at retirement age, and sustainable monthly income.
Investment Calculator
Simulate long-term investment growth with recurring monthly additions, compound returns, and portfolio ROI metrics.
Inflation Calculator
Calculate the erosion of purchasing power over time and the future cost of goods due to inflation.
Mortgage Payoff Calculator
Calculate your estimated mortgage payoff date, extra monthly payments, and total interest saved.
Compound Interest Calculator
Calculate compound interest growth with regular monthly additions, annual percentage yield (APY), and visual timeline breakdown.
401(k) Calculator
Calculate retirement nest egg growth with employer matching contributions, salary growth, and annual compounding returns.
Interest Rate Calculator
Calculate effective loan APR, annual interest rate, total interest paid, and monthly payments.
House Affordability Calculator
Find out how much house you can afford based on income, monthly debts, and down payment.
Rent Affordability Calculator
Calculate how much rent you can comfortably afford based on income and budgeting rules.
Estate Tax Calculator
Estimate federal estate tax liability, taxable estate value, and unified lifetime exemptions.
Social Security Benefits Calculator
Estimate monthly Social Security retirement payouts from age 62 to 70.
Annuity Payout Calculator
Calculate guaranteed monthly annuity payouts from a lump-sum retirement investment.
Credit Cards Payoff Calculator
Accelerate debt payoff across multiple credit cards using Debt Avalanche or Snowball methods.
Debt Consolidation Calculator
Compare current multiple debts against a single low-rate consolidation personal loan.
Student Loan Calculator
Calculate monthly college loan payments, standard 10-year repayment, and early prepayment savings.
Simple Interest Calculator
Calculate non-compounding simple interest using the formula I = P x r x t.
Sales Tax Calculator
Calculate sales tax, total purchase price, or reverse tax to find pre-tax net cost.
High Yield Savings Calculator
Calculate compound growth, interest earned, and goal timelines in High Yield Savings Accounts (HYSA).
Marriage Tax Calculator
Compare Married Filing Jointly vs Married Filing Separately to model marriage tax penalty or bonus.
Pension Benefits Calculator
Estimate defined-benefit pension payouts using years of service and high-3/5 average salary.
Annuity Accumulation Calculator
Calculate future value of ordinary annuities and annuities due with compound growth.
Credit Card Minimum Payment Calculator
Expose the true cost of making minimum credit card payments vs fixed accelerated payoffs.
Debt Payoff Calculator
Create an aggressive debt elimination plan and pinpoint your exact debt-free date.
Loan Repayment Calculator
Calculate installment loan repayments with optional balloon payment at loan maturity.
College Cost & 529 Savings Calculator
Project future university tuition with education inflation and model 529 college savings.
High Yield CD Calculator
Calculate High Yield Certificate of Deposit (CD) interest, APY maturity balance, and penalty costs.
Bond Calculator
Calculate bond price, yield to maturity (YTM), current yield, and annual coupon payments accurately.
Mutual Fund Calculator
Estimate mutual fund future value, SIP compound growth, and the true cost of expense ratios.
Roth IRA Calculator
Calculate tax-free compound interest, annual contributions, and retirement returns in a Roth IRA.
IRA Calculator
Compare Traditional IRA and Roth IRA growth, upfront tax deductions, and retirement distributions.
RMD Calculator
Calculate IRS Required Minimum Distributions (RMD) from 401(k) and Traditional IRA accounts.
VAT Calculator
Add or remove Value Added Tax (VAT) from prices with standard and custom tax rates.
Cash Back or Low Interest Calculator
Compare dealer cash back rebate offers against promotional low APR auto financing.
Auto Lease Calculator
Calculate auto lease monthly payments, money factor APR, depreciation charges, and residual values.
Depreciation Calculator
Compute asset depreciation schedules using Straight-Line, Double Declining Balance, and Sum-of-the-Years'-Digits.
Average Return Calculator
Calculate compound annual growth rate (CAGR), geometric mean, and arithmetic average returns for investments.
Margin Calculator
Calculate gross profit margin, markup percentage, revenue, and cost of goods sold (COGS).
Discount Calculator
Calculate sale prices, percentage discounts, stacked coupons, and final price including sales tax.
Business Loan Calculator
Calculate commercial loan payments, SBA loan terms, total interest costs, and origination fees.
Debt-to-Income Ratio Calculator
Calculate front-end and back-end debt-to-income (DTI) ratios to evaluate mortgage readiness.
Real Estate Calculator
Evaluate rental property investments with Cap Rate, Cash-on-Cash Return, Net Operating Income (NOI), and Cash Flow.
Take-Home-Paycheck Calculator
Calculate net take-home pay per paycheck after federal income tax, FICA (Social Security & Medicare), state tax, and pre-tax deductions.
Personal Loan Calculator
Estimate monthly personal loan payments, total interest charges, and amortization timeline.
Boat Loan Calculator
Calculate boat and marine watercraft loan payments, down payment impact, and ongoing maintenance costs.
Lease Calculator
General asset and equipment lease payment calculator with money factor and interest rate support.
Refinance Calculator
Calculate mortgage refinance monthly savings, lifetime interest reduction, closing costs, and break-even timeline.
Budget Calculator
Plan monthly personal finances, income allocations, debt payments, and 50/30/20 rule breakdown.
Rental Property Calculator
Analyze real estate cash flow, Cap Rate, Cash-on-Cash return, and Net Operating Income (NOI).
IRR Calculator
Calculate Internal Rate of Return (IRR) and Net Present Value (NPV) for multi-year cash flows.
ROI Calculator
Calculate Return on Investment (ROI) and annualized compound return (CAGR) across any holding period.
APR Calculator
Calculate true Annual Percentage Rate (APR) factoring in upfront loan fees, points, and closing costs.
FHA Loan Calculator
Calculate FHA mortgage payments, Upfront MIP (1.75%), monthly MIP (0.55%), taxes, and insurance.
VA Mortgage Calculator
Calculate zero-down VA home loans, VA funding fees, and disability exemption savings.
Home Equity Loan Calculator
Calculate fixed-rate home equity borrowing power (second mortgage), CLTV limits, and monthly payments.
HELOC Calculator
Estimate Home Equity Line of Credit payments across interest-only draw and principal repayment periods.
Down Payment Calculator
Compare down payment amounts (3%, 5%, 10%, 20%), PMI elimination, and monthly savings.
Rent vs. Buy Calculator
Compare total net costs of homeownership vs renting over 5, 7, 10, or 30 years.
Payback Period Calculator
Calculate regular and discounted payback periods and project NPV for capital investments.
Present Value Calculator
Determine current worth of a future sum of money or stream of cash flows (PV).
Future Value Calculator
Forecast future accumulated value of initial investments and periodic contributions (FV).
Commission Calculator
Calculate sales rep commissions, tiered bonuses, broker splits, and total earnings.
Mortgage Calculator UK
Calculate UK mortgage repayments, LTV ratios, and Stamp Duty Land Tax (SDLT) tiers.
Canadian Mortgage Calculator
Canadian mortgage payments with semi-annual compounding laws and CMHC default insurance.
Mortgage Amortization Calculator
Yearly principal reduction schedule and time/interest savings from extra monthly payments.
Percent Off Calculator
Calculate retail sale prices with single or stacked coupons and sales tax.
Feet and Inches Calculator
Add, subtract, multiply, divide, and convert feet and inches with exact tape measure fractions (1/16" to 1/64").
Tree Removal Cost Calculator
Calculate tree cutting and removal costs based on height, trunk diameter, species, accessibility, and stump grinding.
Height Comparison — Visual Height Chart & Scale Tool
Visual height comparison scale chart to compare heights of up to 20 people, couples, celebrities, characters, and objects in cm, feet, and inches.
AP® US History (APUSH) Score Calculator
Calculate your official AP® US History (APUSH) exam composite score and projected 1–5 grade with College Board curve modeling.
Boiler Feed Pump Calculator & Sizing Tool
Calculate Total Dynamic Head (TDH), brake shaft power, motor rating, NPSHa, and velocity for boiler feed pump applications.
Mean Calculator
Calculate sample mean (x̄), population mean (μ), median, mode, geometric mean, and step-by-step solutions for raw and grouped datasets.
FPS Calculator & Bottleneck Checker
Estimate gaming FPS, 1% low framerates, CPU/GPU bottleneck percentage, and resolution scaling for popular PC games.
Parlay Calculator (Sports Betting Odds & Payout Multiplier)
Calculate compounded parlay betting odds, potential payouts, net profit, and implied probability for multi-leg sports bets and round robins.
Cultist Circle Calculator (EFT Tarkov Sacrifice & Thresholds)
Calculate Escape from Tarkov Cultist Circle sacrifice values, hit 350,001 ₽ and 400,000 ₽ threshold breakpoints, track ritual timers, and find cheapest barter recipes.
RREF Calculator (Reduced Row Echelon Form with Step-by-Step Solutions)
Convert any matrix to Reduced Row Echelon Form (RREF) step-by-step using Gauss-Jordan elimination with exact fractions, pivot mapping, rank, and system solutions.
Sig Fig Calculator (Significant Figures Counter & Rounder)
Calculate and count significant figures, evaluate arithmetic expressions, round to target sig figs, and convert to scientific notation.
Limit Calculator (Evaluate Calculus Limits with Step-by-Step Solutions)
Calculate two-sided and one-sided limits (x→c, x⁺, x⁻, x→±∞) with step-by-step solutions, L'Hôpital's rule, factoring, and numerical tables.
Scientific Notation Calculator & Converter (with Steps & E-Notation)
Convert numbers to and from scientific notation, E-notation, engineering notation, and real numbers, or perform scientific arithmetic (X+Y, X×Y, X/Y).
LCM Calculator - Least Common Multiple with Steps
Calculate the Least Common Multiple (LCM) of two or more numbers with step-by-step solutions using Cake/Ladder, Prime Factorization, Division Table, and Multiples listing.
Sphere, Cone & Cylinder Volume Calculator
Calculate 3D volume, surface area, and liquid capacity for spheres (balls), cones, cylinders, hemispheres, and capsules with step-by-step proofs.
45-45-90 & 30-60-90 Special Right Triangle Calculator
Calculate exact side lengths, hypotenuse, area, perimeter, and trig ratios for 45-45-90 and 30-60-90 special right triangles with radical steps.
Watt-Hours (Wh) & Amp-Hours (Ah) Battery Runtime Calculator
Convert Watt-hours to Amp-hours, calculate battery capacity, estimate appliance backup runtime, and size solar panel charging.
Steps to Miles & Walking Calorie Calculator
Convert steps to miles, kilometers, meters, and track laps with customized height, stride length, walking pace, and calories burned.
Pay Raise & Salary Increase Calculator (Hourly & Annual)
Calculate wage increase percentage, dollar gains, hourly vs annual salary jumps, and inflation-adjusted real purchasing power.
Parallelogram & Trapezoid Area Calculator with Steps
Calculate area, perimeter, heights, diagonals, and angles for parallelograms and trapezoids with step-by-step geometric proofs.