Everyday Calculators Free Online Tools

Age Calculator

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

Convert your cat's age to human-equivalent years using veterinary guidelines.

Find the exact time between two dates in years, months, days, weeks, and hours.

Count the days, weeks, hours, and minutes until any future date.

Calculate the sale price and savings from any discount percentage or fixed amount off.

Convert your dog's age to human-equivalent dog years using AKC size-based guidelines.

Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles instantly.

Compare prices per unit across multiple products to find the best value.

Find your ring size from circumference or diameter measurements in US, UK, and EU sizing systems.

Convert between mph, km/h, m/s, ft/s, and knots instantly.

Split a restaurant bill evenly among any number of people, with optional tip.

Convert between Fahrenheit, Celsius, and Kelvin instantly.

Add, subtract, or find the difference between times in hours, minutes, and seconds.

Convert times between major world time zones using UTC offsets.

Calculate the tip amount and total bill with quick preset buttons for 15%, 18%, 20%, and 25%.

Convert between pounds, kilograms, ounces, grams, and stone instantly.