About CalculatorAtTips

Everyday calculators that show their working.

CalculatorAtTips is a small set of free calculators for everyday questions: percentages, ages, tips and more. Each one is built to load quickly, work well on a phone, and show the formula behind every answer so you can check it yourself.

Every calculator is tested against worked examples before it goes live. If you spot a mistake or want a calculator added, get in touch.