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Welcome to Online Calculator! We have a range of free, easy to use calculators, conversion tools, and much more!
Our tools are designed to help you perform a wide range of calculations and conversions quickly and accurately, whether you're at home, at work, or on the go.
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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 CalculatorConversions 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!
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!