Calculators
Explore calculators and converters by category or search for exactly what you need.
Conversions
2 calculatorsFinance
2 calculatorsHealth & Fitness
12 calculatorsBMI Calculator
Calculate body mass index from height and weight.
Calorie Calculator
Estimate daily calorie needs from age, height, weight and activity level.
Body Fat Calculator
Estimate body-fat percentage using body measurements and a circumference-based formula.
BMR Calculator
Estimate basal metabolic rate with the MifflinโSt Jeor equation.
Ideal Weight Calculator
Compare common reference-weight formulas and the healthy BMI range for your height.
Pace Calculator
Calculate running pace and average speed from distance and elapsed time.
Army Body Fat Calculator
Estimate body fat from circumference measurements; this is not an official military assessment.
Lean Body Mass Calculator
Estimate lean body mass and lean percentage from height and weight.
Healthy Weight Calculator
Estimate an adult weight range based on a healthy BMI range of 18.5โ24.9.
Calories Burned Calculator
Estimate exercise calories from body weight, duration and activity intensity.
One Rep Max Calculator
Estimate one-repetition maximum from the weight lifted and repetitions completed.
Target Heart Rate Calculator
Estimate moderate and vigorous exercise heart-rate zones from age and resting pulse.
Home & Construction
1 calculatorsMath
40 calculatorsPercentage Calculator
Calculate percentages, increases and decreases.
Discount Calculator
Calculate sale price and savings.
Scientific Calculator
Evaluate scientific expressions with trigonometric functions, logarithms, powers, roots and constants.
Graphing Calculator
Graph functions online, explore curves, compare equations and inspect y-values across an adjustable x-range.
Fraction Calculator
Calculate fraction sums, products, quotients and simplified results.
Random Number Generator
Generate random integers in a range.
Percent Error Calculator
Compare an observed value with an expected value.
Exponent Calculator
Calculate powers using a base and exponent.
Binary Calculator
Add, subtract and multiply binary numbers.
Hex Calculator
Calculate with hexadecimal numbers.
Half-Life Calculator
Estimate remaining quantity after elapsed half-life periods.
Quadratic Formula Calculator
Solve quadratic equations and inspect the discriminant.
Log Calculator
Calculate logarithms with a chosen base.
Ratio Calculator
Simplify ratios and compare their parts.
Root Calculator
Calculate an nth root of a number.
Least Common Multiple Calculator
Find the least common multiple (LCM) of two integers to compare multiples and solve fraction or scheduling problems.
Greatest Common Factor Calculator
Find the greatest common factor of two integers.
Factor Calculator
Find all positive factors of a whole number, check factor pairs and understand how divisibility works.
Rounding Calculator
Round numbers to decimal places and inspect floor and ceiling.
Matrix Calculator
Matrix operations are planned for a future release.
Scientific Notation Calculator
Convert a number to scientific notation.
Big Number Calculator
Perform integer arithmetic beyond normal numeric precision.
Standard Deviation Calculator
Calculate descriptive statistics including standard deviation.
Number Sequence Calculator
Generate arithmetic sequences.
Sample Size Calculator
Estimate sample size for a proportion and margin of error.
Probability Calculator
Calculate simple probability from favorable and total outcomes.
Statistics Calculator
Summarize a list of numeric data.
Mean, Median, Mode, Range Calculator
Calculate mean, median, mode and range from a data set.
Permutation and Combination Calculator
Calculate permutations and combinations.
Z-Score Calculator
Calculate how many standard deviations a value is from the mean.
Confidence Interval Calculator
Estimate a 95% confidence interval for a sample mean.
Triangle Calculator
Calculate triangle perimeter and area from three sides.
Volume Calculator
Calculate common sphere, cylinder and cube volumes.
Slope Calculator
Calculate the slope between two coordinate points.
Area Calculator
Calculate common rectangle, triangle and circle areas.
Distance Calculator
Calculate distance between two coordinate points.
Circle Calculator
Calculate circle diameter, circumference and area.
Surface Area Calculator
Calculate surface areas of common three-dimensional shapes.
Pythagorean Theorem Calculator
Calculate the hypotenuse of a right triangle.
Right Triangle Calculator
Calculate basic measurements of a right triangle.