Calculators
Explore fast, practical calculators for money, math, everyday tasks, health estimates, education, and measurement.
Percentage Calculator
Calculate a percentage of a number, find what percentage one value is of another, or find a number from a percentage.
Open tool →Compound Interest Calculator
Estimate how an initial balance grows when interest is compounded over time.
Open tool →Simple Interest Calculator
Calculate simple interest and the final amount without compounding.
Open tool →Loan Calculator
Estimate a fixed monthly loan payment and total interest.
Open tool →Mortgage Calculator
Estimate monthly principal and interest for a fixed-rate home loan.
Open tool →Investment Calculator
Estimate future investment value with regular monthly contributions.
Open tool →Savings Calculator
Estimate how savings can grow with regular deposits and interest.
Open tool →ROI Calculator
Calculate return on investment from cost and ending value.
Open tool →Profit Margin Calculator
Calculate profit, margin percentage, and markup from revenue and cost.
Open tool →Discount Calculator
Find the sale price and savings after a percentage discount.
Open tool →Sales Tax Calculator
Calculate sales tax and the total price after tax.
Open tool →Salary Calculator
Convert an annual salary into monthly, weekly, daily, and hourly estimates.
Open tool →Tip Calculator
Calculate a tip, total bill, and per-person amount.
Open tool →Inflation Calculator
Measure the percentage increase or decrease between two price levels.
Open tool →APR Calculator
Estimate a simple annual percentage rate from borrowing costs.
Open tool →APY Calculator
Convert a nominal annual rate and compounding frequency into annual percentage yield.
Open tool →Break-Even Calculator
Estimate how many units must be sold to cover fixed and variable costs.
Open tool →Markup Calculator
Calculate markup percentage and gross profit from cost and selling price.
Open tool →Unit Price Calculator
Find the price per item, weight unit, or other quantity.
Open tool →Commission Calculator
Calculate commission earnings from sales and a commission rate.
Open tool →Depreciation Calculator
Calculate straight-line annual depreciation and book value after a number of years.
Open tool →Future Value Calculator
Estimate the future value of a lump sum at a fixed annual return.
Open tool →Present Value Calculator
Discount a future amount back to its estimated value today.
Open tool →Debt-to-Income Calculator
Calculate a debt-to-income ratio from monthly debt payments and gross monthly income.
Open tool →Credit Card Payoff Calculator
Estimate how long it may take to pay off a credit card with a fixed monthly payment.
Open tool →Auto Loan Calculator
Estimate a fixed monthly auto-loan payment and total interest.
Open tool →Hourly to Salary Calculator
Convert an hourly wage into weekly, monthly, and annual earnings.
Open tool →Salary to Hourly Calculator
Convert an annual salary into an estimated hourly rate.
Open tool →Interest Rate Calculator
Estimate an annualized growth rate from a beginning value, ending value, and time period.
Open tool →Loan Payoff Calculator
Estimate payoff time for a balance with a fixed monthly payment.
Open tool →Fraction Calculator
Add, subtract, multiply, or divide two fractions and simplify the result.
Open tool →Ratio Calculator
Simplify a two-number ratio to its lowest whole-number form.
Open tool →Average Calculator
Calculate the arithmetic mean of a list of numbers.
Open tool →Exponent Calculator
Calculate a base raised to an exponent.
Open tool →Square Root Calculator
Calculate the principal square root of a non-negative number.
Open tool →Probability Calculator
Calculate simple probability from favorable outcomes and total outcomes.
Open tool →Area Calculator
Calculate the area of common 2D shapes.
Open tool →Volume Calculator
Calculate the volume of common 3D shapes.
Open tool →Scientific Calculator
Use a compact scientific calculator for arithmetic, powers, roots, logarithms, and trigonometry.
Open tool →GCD Calculator
Find the greatest common divisor of two integers.
Open tool →LCM Calculator
Find the least common multiple of two integers.
Open tool →Percentage Change Calculator
Calculate percentage increase or decrease from an old value to a new value.
Open tool →Quadratic Formula Calculator
Solve a quadratic equation in the form ax² + bx + c = 0.
Open tool →Pythagorean Calculator
Find the hypotenuse of a right triangle from its two legs.
Open tool →Standard Deviation Calculator
Calculate population and sample standard deviation for a list of numbers.
Open tool →Median Calculator
Find the median of a list of numbers.
Open tool →Mode Calculator
Find the most frequently occurring value or values in a list.
Open tool →Prime Number Calculator
Check whether a whole number is prime.
Open tool →Factorial Calculator
Calculate n! for a non-negative integer.
Open tool →Permutation & Combination Calculator
Calculate permutations and combinations for n items taken r at a time.
Open tool →Slope Calculator
Calculate the slope between two points on a coordinate plane.
Open tool →Distance Calculator
Calculate the straight-line distance between two 2D points.
Open tool →Midpoint Calculator
Find the midpoint between two 2D coordinate points.
Open tool →Circle Calculator
Calculate circumference and area from a circle's radius.
Open tool →Triangle Calculator
Calculate triangle area and perimeter from base, height, and side lengths.
Open tool →Surface Area Calculator
Calculate surface area for common 3D solids.
Open tool →Decimal to Fraction Calculator
Convert a decimal into a simplified fraction.
Open tool →Fraction to Decimal Calculator
Convert a fraction into a decimal value.
Open tool →Weighted Average Calculator
Calculate a weighted average from paired values and weights.
Open tool →Age Calculator
Calculate exact age from a birth date to a selected date.
Open tool →Date Difference Calculator
Find the number of days and approximate calendar span between two dates.
Open tool →Date Add/Subtract Calculator
Add or subtract days, weeks, months, or years from a date.
Open tool →Time Duration Calculator
Calculate elapsed time between two times on the same or next day.
Open tool →Countdown Calculator
Run a live countdown to a future date and time.
Open tool →Fuel Cost Calculator
Estimate trip fuel use and fuel cost from distance and fuel economy.
Open tool →Electricity Cost Calculator
Estimate electricity use and cost from appliance power and usage time.
Open tool →Speed Calculator
Calculate average speed from distance and travel time.
Open tool →Pace Calculator
Calculate average pace per mile from distance and total time.
Open tool →GPA Calculator
Calculate a weighted GPA from grade points and course credits.
Open tool →Grade Calculator
Calculate a weighted course grade from scores and weights.
Open tool →BMI Calculator
Calculate body mass index from weight and height.
Open tool →Calorie Calculator
Estimate daily calorie needs from the Mifflin-St Jeor equation and activity level.
Open tool →BMR Calculator
Estimate basal metabolic rate using the Mifflin-St Jeor equation.
Open tool →Body Fat Calculator
Estimate adult body fat percentage using the U.S. Navy circumference method.
Open tool →Ideal Weight Calculator
Estimate reference adult body weight from height using several common formulas.
Open tool →Water Intake Calculator
Estimate a simple daily water target from body weight.
Open tool →Concrete Calculator
Estimate concrete volume for a rectangular slab and convert it to cubic yards.
Open tool →Paint Calculator
Estimate paint quantity from wall area and paint coverage.
Open tool →Tile Calculator
Estimate the number of tiles needed for an area, including waste.
Open tool →Square Footage Calculator
Calculate rectangular floor or wall area in square feet.
Open tool →