Centimetres per Hour to Millimetres per Hour (cm/h to mm/h)
1 centimetre per hour (cm/h) = 10 millimetres per hour (mm/h). 1 mm/h = 0.1 cm/h. Example: 15 cm/h = 15 × 10 = 150 mm/h.
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1 cm/h = 10 mm/h
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk centimetre per hour to millimetre per hour converter to paste a column from Excel.
How to Convert Centimetre per Hour to Millimetre per Hour
- 1 cm/h = 10 mm/h
- 1 mm/h = 0.1 cm/h
- Example: convert 15 cm/h to mm/h: 15 cm/h = 15 × 10 mm/h = 150 mm/h
Formula
mm/h = cm/h × 10
Derivation from SI units:
- 1 cm/h = 0.01/3600 m/s.
- 1 mm/h = 0.001/3600 m/s.
- 1 cm/h = 0.000002777777777778 m/s ÷ 2.777777777778 × 10⁻⁷ m/s per mm/h = 10 mm/h
Both units are defined exactly, so the factor is exact. Centimetre per Hour definition: centimetre per hour; Millimetre per Hour definition: millimetre per hour.
Worked examples
- A reading of 2 cm/h converts to 20 mm/h.
2 cm/h × 10 = 20 mm/h - A value of 6.25 cm/h is 62.5 mm/h.
6.25 cm/h × 10 = 62.5 mm/h
Centimetre per Hour to Millimetre per Hour conversion table
| Centimetres per Hour (cm/h) | Millimetres per Hour (mm/h) |
|---|---|
| 0.1 cm/h | 1 mm/h |
| 0.5 cm/h | 5 mm/h |
| 1 cm/h | 10 mm/h |
| 2 cm/h | 20 mm/h |
| 2.5 cm/h | 25 mm/h |
| 5 cm/h | 50 mm/h |
| 6.25 cm/h | 62.5 mm/h |
| 10 cm/h | 100 mm/h |
| 12.5 cm/h | 125 mm/h |
| 25 cm/h | 250 mm/h |
Where it's used
Centimetres per Hour are used for infiltration capacity and Horton’s equation, while millimetres per hour appear in sprinkler application rate versus infiltration. Both measure hydraulic conductivity (coefficient of permeability k), so the conversion is a fixed factor.
Centimetre per Hour to other hydraulic conductivity units
| Conversion | 1 cm/h equals |
|---|---|
| centimetre per hour to millimetre per hour | 10 mm/h |
| centimetre per hour to metre per second | 0.000002777777778 m/s |
| centimetre per hour to centimetre per second | 0.0002777777778 cm/s |
| centimetre per hour to metre per day | 0.24 m/day |
| centimetre per hour to foot per day | 0.7874015748 ft/day |
| centimetre per hour to inch per hour | 0.3937007874 in/h |
| centimetre per hour to gpd/ft² | 5.890172819 gpd/ft² |
Frequently asked questions
How many millimetres per hour are in 1 centimetre per hour?
1 cm/h = 10 mm/h.
How do I convert centimetres per hour to millimetres per hour?
Multiply the value in cm/h by 10. For example, 15 cm/h × 10 = 150 mm/h.
Is the cm/h to mm/h conversion exact?
Yes. Both units are defined exactly, and 1 cm/h is exactly 10 mm/h.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units) and Table 8 (non-SI units accepted for use with the SI).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Centimetres per Hour to Millimetres per Hour (cm/h to mm/h). Retrieved October 29, 2026, from https://scientificconverters.com/hydraulic-conductivity/centimeters-per-hour-to-millimeters-per-hour/
IEEE
Scientific Converters, "Centimetres per Hour to Millimetres per Hour (cm/h to mm/h)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/hydraulic-conductivity/centimeters-per-hour-to-millimeters-per-hour/