Percentage calculator

Calculate percentages, find percentage changes, and solve percentage problems.

Percentage change calculator

Calculate the percentage increase or decrease between two values. Perfect for tracking growth, price changes, or performance metrics.

Percent off calculator

Calculate discounts and savings. Find out how much you'll save and the final price after a percentage discount.

Tip percentage calculator

Calculate tip amounts, total bill, and split the cost between multiple people. Perfect for restaurants and services.

Test grade calculator

Calculate your test grade percentage and letter grade. Simply enter points earned and points possible.

Reverse percentage calculator

Find the original amount when you know a percentage and the result. Useful for finding original prices after discounts or working backwards.

Add/Subtract percentage calculator

Quickly add or subtract a percentage from a value. Perfect for adding tax, applying markups, or making quick adjustments.

Compound percentage calculator

Calculate the result after multiple percentage changes applied sequentially. Ideal for tracking cumulative changes over time.

BMI calculator

Calculate Body Mass Index from height and weight. Determine your BMI to assess health and fitness levels.

Unit converter

Convert between units of length, weight, temperature, volume, and more. Transform measurements to different unit systems.

Length converter

Convert between units of length including meters, kilometers, inches, feet, yards, miles, and more.

Weight converter

Convert between units of weight including kilograms, grams, pounds, ounces, tons, and more.

Temperature converter

Convert between Celsius, Fahrenheit, and Kelvin temperature scales.

Volume converter

Convert between units of volume including liters, milliliters, gallons, quarts, pints, cups, and more.

Loan calculator

Calculate loan payments, total interest, and amortization schedule. Perfect for personal loans, auto loans, and mortgages.

Calorie calculator

Calculate your daily calorie needs based on BMR and activity level. Perfect for weight management and fitness goals.