About RK Calculator

RK Calculator is a free collection of calculators and converters for everyday maths, money, construction, cooking, dates and more. The aim is simple: give the right answer, show how it was worked out, and make the tool quick to use on any device.

How our calculators work

• Every calculation runs in your browser. The numbers you type are not sent to our servers.
• Each calculator shows its formula, the sources it relies on and its limitations, so you can check the result yourself.
• Exact arithmetic is used wherever it matters, so answers aren't spoiled by rounding along the way.
• Every calculator is tested against worked examples calculated independently, and is reviewed and verified by the RK Calculator Team before it is published. Read our editorial policy for the details.

Who runs RK Calculator

RK Calculator is run by Reddy RK, based in United States.

Contact

Email hello@rkcalculator.com. If you think a result is wrong, please see how to report an error.