About KookyCalculators

KookyCalculators is a collection of 43 free, fast calculators. No sign-ups, no pop-up forms — type your numbers and get an answer instantly.

You'll find the everyday essentials — mortgage, loan, BMI, percentage, tip — alongside our own originals, like how many weekends you have left or which pizza deal really gives you more pizza.

Every calculator shows the formula it uses, so you can see exactly how the answer was worked out. Spot an error or want a new calculator? Get in touch.