How Much Water?

[claymore]

Is this correct? A millimeter of water over a square meter equals 1 liter.

[vetuste_ennemi]

Yes: one cubic metre = 1000 litres.

[Gizmonster]

By definition, 1 litre = 1000 cubic cm

A block measuring 1 mm x 1 m x 1 m has a volume of 1000 cubic cm
( 0.1 cm x 100 cm x 100 cm = 1000 cubic cm), so yea you are correct.

[Alonelywriter]

calculations are not approximate

[New Judge]

And an inch (2.5cm) of rain falling on an acre (0.4 hectares) of land (roughly half the size of a football pitch) weighs just over 100 tons (100,000 kilograms).