A metre is the basic unit of length.

1 m
= 10 dm (decimetres)
= 100 cm (centimetres)
= 1000 mm (millimetres)
= 1,000,000 μm (micron or micrometres)
= 1,000,000,000 nm (nanometres)
= 1,000,000,000,000 pm (picometres)