All calculators

Percentage Calculator

Work out any percentage instantly — three calculators in one.

Percentage Increase Calculator

Add a percentage to a number, or find the percent increase between two values.

Percentage Decrease Calculator

Subtract a percentage from a number, or find the percent decrease between two values.

Percentage Difference Calculator

Find the percentage difference between two values, relative to their average.

Finance

Finance hub →

Discount Calculator

See how much you save and what you pay after a percent-off discount.

Tip Calculator

Calculate the tip and split the total between any number of people.

Margin Calculator

Find profit, profit margin, and markup from cost and revenue.

VAT Calculator

Add or remove VAT (or sales tax) to find the net, tax, and gross amounts.

Sales Tax Calculator

Add sales tax to a price, or remove it from a total.

Compound Interest Calculator

See how savings grow with compound interest and regular contributions.

Commission Calculator

Calculate sales commission and total pay from a sale and rate.

Mortgage Calculator

Estimate your full monthly mortgage payment — PITI, PMI, and HOA.

Loan Calculator

Monthly payment, total interest, and payoff schedule for any loan.

Home Affordability Calculator

How much house can you afford? Based on the 28/36 DTI rule.

Amortization Schedule

A complete payment-by-payment breakdown for any loan.

Auto Loan Calculator

Estimate your car payment with trade-in and sales tax.

Credit Card Payoff Calculator

See how fast you'll be debt-free — and the cost of paying only the minimum.

Savings Goal Calculator

Find the monthly amount to save to hit your target on time.

Math

Math hub →

Average Calculator

Find the mean, median, sum, min, max, and range of a list of numbers.

GPA Calculator

Calculate your grade point average on the 4.0 scale, weighted by credits.

Fraction to Decimal Converter

Convert any fraction to a decimal (and a percentage), with the simplified form.

Random Number Generator

Generate random numbers in any range — with optional unique values.

Ratio Calculator

Simplify ratios and solve proportions (A : B = C : ?).

Standard Deviation Calculator

Find standard deviation, variance, and mean for a data set.

Percent Error Calculator

Compare a measured value to the true value as a percentage.

Unit Converter

Convert between length, weight, temperature, area, volume, speed, time, and data units instantly.

Scientific Calculator

A full scientific calculator — trig, logs, powers, factorials, and constants.

Grade Calculator

Weighted grade average, letter grade, GPA — and the score you need on the final.

Square Footage Calculator

Calculate area in square feet for rooms and common shapes.

Everyday

Password Generator

Strong, random passwords generated entirely in your browser.

Health

Health hub →

BMI Calculator

Calculate body mass index from height and weight (metric or imperial).

TDEE Calculator

Estimate your daily calorie burn (TDEE) and BMR.

Calorie Calculator

Find your daily calorie target to lose, maintain, or gain weight.

Body Fat Calculator

Estimate your body fat percentage with the U.S. Navy method.

Pace Calculator

Running pace, finish time, and speed — with per-distance splits.

Macro Calculator

Turn your calorie target into daily protein, carb, and fat grams.

Sleep Calculator

Find the best bedtime or wake-up time using 90-minute sleep cycles.

Time & Date

Time & Date hub →

Age Calculator

Calculate exact age in years, months, and days between two dates.

Hours Calculator

Find the hours and minutes between times — including overnight shifts.

Date Calculator

Add or subtract days from a date — and count the days between two dates.

Date Difference Calculator

Days, weeks, months, and working days between two dates.

Time Zone Converter

Convert times between any two cities, with a live world clock.