Length Converter

Convert lengths between metres, centimetres, millimetres, kilometres, ångströms, nanometres, inches and feet.

Open in the full calculator → — with every other tool, the AI tutor and PNG export.

How it converts

Result = value × (factor of the unit you convert from) ÷ (factor of the unit you convert to), every factor being the size of the unit in m:
1 cm = 0.01 m
1 mm = 0.001 m
1 km = 1000 m
1 Å = 1 × 10-10 m
1 nm = 1 × 10-9 m
1 inch = 0.0254 m
1 ft = 0.3048 m

Worked example

1 Å = 1 × 1 × 10-10 ÷ 1 × 10-9 = 0.1 nm.

Quick reference

Learn the method

About this converter

One of the unit converters in the Chemistry Calculator Suite, alongside its chemistry, physics and maths tools. Nothing is behind a login and no value you type is sent anywhere — the conversion runs in your own browser.

The Length converter above is the live tool — it converts right here on the page. The link under it opens the full suite with this set already selected.

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