Which units does the Rainfall Converter support?

Millimetres, inches and litres per square metre, converted instantly as you type.

Does 1 mm of rain equal 1 litre per square metre?

Yes. One millimetre of rainfall over one square metre is one litre of water, which is why the converter can show both units together.

Yes. It is free, needs no signup, and runs entirely in your browser.

Enter the rainfall amount and convert it instantly between mm, inch and litres per square metre.

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1 mm of rain means 1 litre of water per square metre. That is why mm and L/m2 always have the same value.