About Calculator Friendly
Calculator Friendly (calculatorfriendly.com) is an independent web project dedicated to making everyday math effortless.
Our mission
We believe a good calculator should be three things: accurate, understandable and instantly usable on any device. Calculator Friendly is being built as a growing library of free online calculators that meet all three standards — from finance and health to math, unit conversions and everyday life.
Who we are
Calculator Friendly is operated by a small independent team of web developers and writers. Each calculator we publish is researched, implemented against trusted reference formulas, and reviewed for clarity before it goes live. Where appropriate, we cite the formulas and standards we use so readers can verify the math themselves.
Our editorial approach
- Every tool is written by a human author and reviewed before publication.
- We test calculators against worked examples from textbooks, official sources or recognised standards.
- We keep the writing plain, friendly and free of jargon wherever possible.
- We never publish content we cannot stand behind.
How we make money
Calculator Friendly is free to use. To keep it that way we display advertising, including ads served by Google AdSense and other ad networks. Advertising never influences our calculators or the way we explain results. See our Privacy Policy for details on cookies and ads, and our Disclaimer for important notes on how to use our tools.
Get in touch
We love hearing from readers. If you have a request, a correction or just want to say hello, head to our Contact page or our Help, Requests & Suggestions page.