mm to cm – convert millimetres to centimetres
Convert millimetres to centimetres (mm to cm) to make fine measurements easier to read and communicate. Great for technical drawings, DIY, design and engineering. This page opens the main length converter with mm → cm pre-selected.
Open the interactive mm → cm converter:
Use main converter (mm → cm) or switch to cm → mmThe main length tool also handles inches, feet, yards, metres and kilometres.
Quick reference: mm to cm
There are 10 mm in 1 cm, so: centimetres = millimetres ÷ 10. Examples:
| Length (mm) | Length (cm) |
|---|---|
| 5 mm | 0.5 cm |
| 10 mm | 1 cm |
| 25 mm | 2.5 cm |
| 50 mm | 5 cm |
| 100 mm | 10 cm |
| 250 mm | 25 cm |
Why convert millimetres to centimetres?
mm to cm is useful when you:
- Summarise very small measurements into cleaner numbers.
- Prepare drawings or specs that are easier to read in cm.
- Convert caliper or 3D printer readings to ruler-friendly units.
- Help students move between different metric scales.
Other length converters on this site
Metric length units are all powers of ten, which makes mental conversions like mm ↔ cm ↔ m straightforward once you know the factors.
Page last updated: 11 December 2025.