About CalcBright

CalcBright (calcbright.com) is a collection of free, easy-to-use calculators and converters for everyday money, health, math and time questions. Every tool is built to be fast on any device, to explain the formula it uses, and to give you a link to your result that you can save or share.

How our calculators work

All calculations use standard, published formulas – for example the amortization formula used by lenders, the Mifflin–St Jeor equation for calorie needs, and internationally defined unit conversion factors. Each tool's page explains its method so you can check the maths yourself. Calculations run directly in your browser, and exchange rates are refreshed automatically several times a day from a public reference source.

Accuracy and limitations

We test our calculators carefully, but results are estimates for general information. They are not financial, tax, legal or medical advice. Please confirm important decisions with a qualified professional.

Get in touch

Found a bug or want a new calculator? Email contact@calcbright.com – we read every message.