Welcome to Online Calculator! We have a range of freeeasy to use calculatorsconversion toolsand much more!
Our tools are designed to help you perform a wide range of calculations and conversions quickly and accuratelywhether you're at homeat workor on the go.

Conversions Calculators

Effortlessly convert unitscurrenciesand more with our comprehensive range of simple to use conversion calculators! Here are just a fewmake sure you check our all the others we have to offer!

Our weight conversion tools are accurateeasy to useand offer a wide range of units.

Get precise and hassle-free length conversions with our user-friendly and comprehensive length conversion calculators.

Length Conversions

Our temperature conversion calculators are accuratesimple to useand covers various temperature units.

Temperature Conversions

Loads of other easy to use conversion tools!

More Conversions...

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 oldand wanted to help his father do his tax calculations. Join us on the fascinating history of the calculator!

The History of the Calculator!

Welcome to Online Calculator! We have a range of freeeasy to use calculatorsconversion toolsand much more!Our tools are designed to help you perform a wide range of calculations and conversions quickly and accuratelywhether you're at homeat workor on the go.

Conversions Calculators

Effortlessly convert unitscurrenciesand more with our comprehensive range of simple to use conversion calculators! Here are just a fewmake sure you check our all the others we have to offer!

The History of the Calculator!

Welcome to Online Calculator! We have a range of freeeasy to use calculatorsconversion toolsand much more!
Our tools are designed to help you perform a wide range of calculations and conversions quickly and accuratelywhether you're at homeat workor on the go.