Calculators

Tip Calculator

Calculate the tip and split the bill instantly. Enter your total, tip %, and number of people.

Age Calculator

Calculate your exact age in years, months, and days. Find out how many days until your next birthday.

Sleep Calculator

Find the best time to wake up or go to sleep based on 90-minute sleep cycles. Wake up feeling refreshed.

Percentage Calculator

Calculate percentages instantly. Find what % of a number is, percentage change, or what % one number is of another.

Discount Calculator

Calculate the sale price after a discount instantly. See how much you save and what you actually pay.

Date Difference Calculator

Calculate the number of days, weeks, or months between two dates. How many days until an event?

BMI Calculator

Calculate your Body Mass Index (BMI) in seconds. Supports metric and imperial units. See your BMI category.

Unit Converter

Convert between units of length, weight, temperature, volume, speed, and area. Fast and accurate.

Calorie Calculator

Calculate your daily calorie needs (TDEE) based on age, weight, height, and activity level. Set goals for weight loss or gain.

Currency Converter

Convert between 20+ world currencies with daily exchange rates from the European Central Bank. Free, no signup.

Mortgage Calculator

Calculate your monthly mortgage payment, total interest, and amortization. Enter loan amount, interest rate, and term.

Loan Calculator

Calculate monthly loan payments, total interest, and payoff schedule for any personal or car loan.