Welcome to calcul.io

Calcul.io is as easy and intuitive as possible. It's so fun to use that it'll soon became your new favorite online tool.

Let's go through all of the various functionalities together. But let's start from the simplest example:

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Every example is fully interactive. Feel free to try calculations right inside them!

Easy enough!

Calcul.io work more like a notepad than a calculators you're used to.

Write your math problems on the left side like a normal text and see results immediately on the right side.

Calcul.io calculates equations line by line, from top to bottom. Killer feature is that it remembers results from previous lines!

You can continue with your calculations directly on the next line:

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Notice that number 3 on the second line filled automatically based on the result of the previous line.

Or you can even reference a line few lines back by it's line number:

Line number is nothing else but a variable calcul.io presets for you. You can use your own variables:

See also examples with variables like vacation budget.

But calcul.io is capable of much more than meets the eye.

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