Conversions Calculators

Effortlessly convert units, currencies, and more with our comprehensive range of simple to use conversion calculators! Here are just a few, make sure you check our all the others we have to offer!

Our weight conversion tools are accurate, easy to use, and offer a wide range of units.
Get precise and hassle-free length conversions with our user-friendly and comprehensive length conversion calculators.
Our temperature conversion calculators are accurate, simple to use, and covers various temperature units.
Loads of other easy to use conversion tools!

Featured Tools:

These are some of the most popular calculators and tools on the site!

Darts Calculator

Our Darts Calculator helps players calculate scores and checkouts quickly and accurately, making the game more enjoyable and competitive!

Darts Calculator

BMI Calculator

Our BMI Calculator quickly calculates Body Mass Index to help users understand their weight status and make informed health decisions.

BMI Calculator

Online Abacus

Our Online Abacus is a virtual version of the traditional counting tool, designed to help children learn and practice basic math skills.

Online Abacus

Scientific Calculator

Our Scientific Calculator is a powerful tool that performs complex mathematical calculations and functions.

Scientific Calculator

The History of the Calculator!

Online-Calculator.com has been around since 2007! That's a long time!

The original calculator was invented in the 17th century by a Frenchman called Blaise Pascal! He was just 18 years old, and wanted to help his father do his tax calculations. Join us on the fascinating history of the calculator!

The History of the Calculator!