Calculators
81 published tools. Pick a category, or open a calculator straight from the list. No search page is submitted for indexing.
- PercentageFind what percent a part is of a whole
- Percent increaseCalculate a percent increase from A to B
- Percent decreaseCalculate a percent decrease from A to B
- Percent differenceFind the percent difference between two values
- FractionsAdd, multiply, or reduce fractions
- RatioSimplify a ratio A : B
- AverageCalculate the arithmetic mean of a list
- Weighted averageCalculate a weighted average from pairs
- GCF (GCD)Find the greatest common factor of integers
- LCMFind the least common multiple of integers
- Square rootCalculate a square root (x ≥ 0)
- ExponentRaise a base to an exponent
- Pythagorean theoremFind a hypotenuse or missing leg
- Circle areaCalculate the area of a circle
- Triangle areaCalculate triangle area three ways
- Speed, distance, timeFind speed, distance, or travel time
- Amortizing loanEstimate a fixed loan payment
- MortgageEstimate a mortgage principal-and-interest payment
- Compound interestCompound a balance and see the EAR
- Simple interestCalculate simple interest over a term
- Savings with monthly depositsProject a plan with a deposit every month
- ROICalculate return on investment (ROI)
- CAGRCalculate compounded annual growth (CAGR)
- DiscountCalculate a sale price after a percent off
- TipCalculate a tip and split the check
- Profit marginSeparate margin on price from markup on cost
- Sales tax / VATAdd or remove sales tax and VAT from a price
- Hourly to salaryTurn an hourly rate into annual gross pay
- Bill splitSplit a restaurant check equally
- Inflation and purchasing powerSee how inflation changes a money amount
- Calorie calculatorEstimate daily calorie needs
- TDEE calculatorEstimate total daily energy expenditure
- Basal metabolic rateCompare two resting-metabolism formulas
- Macro calculatorSplit energy into protein, carbs, and fat
- Protein calculatorEstimate protein grams from body weight
- BMI calculatorCalculate adult BMI (WHO bands)
- Body fat (Navy method)Estimate body fat from Navy circumferences
- Reference weightShow reference weight ranges for a height
- Water intakeShow a fluid reference: 35 ml/kg and EFSA
- Running paceCalculate running pace from distance and time
- Length converterConvert metric and inch-pound lengths
- Weight (mass) converterConvert metric mass and avoirdupois pounds
- Temperature converterConvert Celsius, Fahrenheit, and kelvin
- Area converterConvert area measures (m², hectare, acre)
- Volume converterConvert volumes, keeping US and UK gallons apart
- Speed converterConvert speed (km/h, m/s, mph, knots)
- Data storage converterConvert bytes, kilobytes, mebibytes, and bits
- Pressure converterConvert pressure (bar, psi, pascal, atm)
- Energy converterConvert energy (joule, kWh, calorie, BTU)
- Power converterConvert power (watt, kilowatt, horsepower)
- Duration converterConvert a duration (seconds, minutes, hours, days)
- Angle converterConvert an angle (degrees, radians, gradians)
- GPA calculatorCalculate a GPA on the 4.0 scale
- Weighted GPACalculate a weighted GPA with honors and AP
- Grade needed on the finalWhat score do you need on the final exam
- Grade as a percentConvert test points to a percent and letter
- Course grade by categoryCalculate a weighted course average
- Cumulative GPACalculate a cumulative GPA over several terms
- Attendance rateCalculate attendance percent and remaining absences