About KiraCalc

KiraCalc is a free collection of fast, accurate online calculators and unit converters. Our goal is simple: when you have a quick calculation to make — your age, the days between two dates, a percentage, a BMI, a tip, or a unit conversion — you should be able to get the answer in seconds, on any device, without ads getting in the way of the result, pop-ups, or a sign-up form.

Who is behind KiraCalc?

KiraCalc is a sister project of KiraDuit, a financial-calculator site for Malaysia. While KiraDuit focuses on local money tools, KiraCalc covers the everyday, universal calculations that anyone, anywhere might need.

How our calculators work

Every calculator on this site runs entirely in your browser using well-established mathematical formulas. Nothing you type is sent to a server — the maths happens on your own device, which keeps things fast and private. Because the formulas behind dates, percentages, conversions and the rest don't change over time, the results stay reliable for years.

We aim for accuracy and clarity, and each tool comes with a plain-English explanation of how the calculation is done, so you can understand the answer rather than just copy it.

A note on accuracy

Our tools are built carefully, but they are intended for general information and everyday use. For decisions with financial, legal, medical or safety consequences, please double-check with a qualified professional. See our disclaimer for more.

Get in touch

Spotted a mistake or have an idea for a calculator we should add? We'd love to hear from you — visit our contact page.