About

AtlasCalc is a free online tool for unit conversions and calculations. Whether you need to convert kilometers to miles, celsius to fahrenheit, or calculate compound interest — AtlasCalc gives you instant, accurate results.

What we offer

AtlasCalc covers a wide range of categories: length, weight, temperature, volume, speed, data, time, energy, area, pressure, and more. In addition to converters, we offer financial and everyday calculators to help with quick decisions.

Our goal

We believe useful tools should be simple and free. AtlasCalc is built to be fast, distraction-free, and accurate — no sign-up required, no intrusive ads, no data harvesting.

Who is it for?

AtlasCalc is used by students, engineers, travelers, cooks, and anyone who needs a quick and reliable answer.

How we keep AtlasCalc free

Running a site takes time and money — servers, domain, development. To keep AtlasCalc completely free to use, we participate in the Amazon Services LLC Associates Program, an affiliate advertising program.

When one of our calculators produces a result that matches a real product — for example, the LED Strip calculator recommending a power supply sized for your installation — we may include a link to that product on Amazon. If you click the link and make a purchase, we earn a small commission at no additional cost to you.

Our recommendations are driven purely by technical fit, not by commission rate. We only suggest brands and products that meet professional engineering standards (such as Mean Well for power supplies) and would stand behind them regardless of any affiliate relationship. If a better or cheaper alternative exists that happens not to be on Amazon, we mention it in the calculator’s explanation.

You can read the full details in our Affiliate Disclosure.