Free online tools for everyday calculations — dates, finance, conversions, and more.
Calculate your exact age in years, months, and days from your birth date.
Add or subtract days, weeks, or months from any date.
Find the exact number of days, weeks, months, or years between two dates.
Set a countdown to any date or event with live updating display.
A simple online stopwatch with start, stop, and lap functionality.
Calculate the tip amount and total bill for any percentage and group size.
Calculate the final price after applying a discount percentage or amount.
Estimate your fuel cost for a trip based on distance, efficiency, and gas price.
Convert between MPG, L/100km, and km/L fuel efficiency units.
Calculate electricity costs based on power usage, hours, and your rate.
Calculate how much concrete you need for slabs, footings, columns, and more.
Calculate the amount of flooring material needed for any room shape.
Estimate the amount of gravel needed for your project based on area and depth.
Convert between cups, tablespoons, teaspoons, grams, and ounces for recipes.
Convert time between different time zones around the world.
Calculate your total parking cost based on hourly rates and duration.