Free calculators

Calculate percentages instantly: find X% of a number, what percent one number is of another, or apply a percentage increase or decrease.

Add, subtract, multiply, and divide fractions. Simplify results and convert between mixed numbers and improper fractions.

Find the mean (average) of any set of numbers. Enter values separated by commas for an instant result.

Calculate sample and population standard deviation, variance, and mean for any dataset.

Simplify ratios, scale proportions, and find an equivalent value when one part of a ratio is known.

See how your money grows with compound interest. Enter principal, rate, compounding frequency, and time.

Estimate your monthly mortgage payment based on loan amount, interest rate, and loan term.

Calculate monthly payments, total interest, and total cost for any fixed-rate loan.

Calculate the area of rectangles, triangles, circles, and other common shapes.

Calculate the volume of cubes, cylinders, spheres, and rectangular prisms.

Calculate your Body Mass Index (BMI) from height and weight, with WHO category classification.

Split the bill and calculate tip amounts for any percentage. Perfect for restaurants and group dining.

Find your exact age in years, months, and days from your date of birth.