Everyday · 11 calculators

Everyday Calculators

Quick answers for daily life — tips, discounts, sales tax, unit prices, and more. The little calculations you do all the time, made effortless.

Jump to Shopping & money Food & home Travel & misc

Shopping & money

Tip and split a bill between people.

Discount Calculator

Sale price and how much you save.

Sales Tax Calculator

Add or remove sales tax from a price.

Unit Price Calculator

Compare prices by cost per unit.

Fuel Cost Calculator

Cost of a trip from distance and mpg.

Food & home

Cooking Converter

Convert between cups, grams, and ounces.

Scale a recipe up or down by servings.

Pizza Calculator

How much pizza to order for a group.

Travel & misc

Gas Mileage Calculator

Your real miles per gallon.

Time Zone Converter

Convert a time across the world.

Your exact age in years and days.

About our everyday calculators

These are the calculators you reach for at a restaurant, in a shop, or on the road. They are deliberately simple: enter a couple of numbers and get the answer, with a clean breakdown so you can double-check it.

Every tool here is free, works instantly in your browser, and never stores the numbers you enter. They give reliable results for everyday use — treat anything high-stakes as a starting point and double-check with a professional.

Frequently asked questions

Are these everyday calculators free?+

Yes. Every everyday calculator on OnlineCalculators.com is completely free, with no sign-up, account, or app required.

Which calculator do most people use?+

Do you store the numbers I enter?+