Millimetres per Hour to Centimetres per Hour (mm/h to cm/h)
1 millimetre per hour (mm/h) = 0.1 centimetres per hour (cm/h). 1 cm/h = 10 mm/h. Example: 25 mm/h = 25 × 0.1 = 2.5 cm/h.
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1 mm/h = 0.1 cm/h
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk millimetre per hour to centimetre per hour converter to paste a column from Excel.
How to Convert Millimetre per Hour to Centimetre per Hour
- 1 mm/h = 0.1 cm/h
- 1 cm/h = 10 mm/h
- Example: convert 25 mm/h to cm/h: 25 mm/h = 25 × 0.1 cm/h = 2.5 cm/h
Formula
cm/h = mm/h ÷ 10
Derivation from SI units:
- 1 mm/h = 0.001/3600 m/s.
- 1 cm/h = 0.01/3600 m/s.
- 1 mm/h = 2.777777777778 × 10⁻⁷ m/s ÷ 0.000002777777777778 m/s per cm/h = 0.1 cm/h
Both units are defined exactly, so the factor is exact. Millimetre per Hour definition: millimetre per hour; Centimetre per Hour definition: centimetre per hour.
Worked examples
- A sprinkler rate of 25 mm/h is 2.5 cm/h.
25 mm/h × 0.1 = 2.5 cm/h - A basic infiltration rate of 5 mm/h is 0.5 cm/h.
5 mm/h × 0.1 = 0.5 cm/h
Millimetre per Hour to Centimetre per Hour conversion table
| Millimetres per Hour (mm/h) | Centimetres per Hour (cm/h) |
|---|---|
| 1 mm/h | 0.1 cm/h |
| 2 mm/h | 0.2 cm/h |
| 5 mm/h | 0.5 cm/h |
| 10 mm/h | 1 cm/h |
| 15 mm/h | 1.5 cm/h |
| 25 mm/h | 2.5 cm/h |
| 50 mm/h | 5 cm/h |
| 75 mm/h | 7.5 cm/h |
| 100 mm/h | 10 cm/h |
| 150 mm/h | 15 cm/h |
Where it's used
Sprinkler application rates and infiltration rates in mm/h are converted to cm/h, the unit of many soil-infiltration tables. Divide by 10.
Millimetre per Hour to other hydraulic conductivity units
| Conversion | 1 mm/h equals |
|---|---|
| millimetre per hour to centimetre per hour | 0.1 cm/h |
| millimetre per hour to metre per second | 2.777777778 × 10⁻⁷ m/s |
| millimetre per hour to centimetre per second | 0.00002777777778 cm/s |
| millimetre per hour to metre per day | 0.024 m/day |
| millimetre per hour to foot per day | 0.07874015748 ft/day |
| millimetre per hour to inch per hour | 0.03937007874 in/h |
| millimetre per hour to gpd/ft² | 0.5890172819 gpd/ft² |
Frequently asked questions
Why compare sprinkler rate with infiltration?
If the application rate exceeds the soil’s basic infiltration rate, water ponds and runs off; 12.5 mm/h = 1.25 cm/h.
How many centimetres per hour are in 1 millimetre per hour?
1 mm/h = 0.1 cm/h.
How do I convert millimetres per hour to centimetres per hour?
Multiply the value in mm/h by 0.1, or divide it by 10. For example, 25 mm/h × 0.1 = 2.5 cm/h.
Is the mm/h to cm/h conversion exact?
Yes. Both units are defined exactly, and 1 mm/h is exactly 0.1 cm/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). Millimetres per Hour to Centimetres per Hour (mm/h to cm/h). Retrieved October 29, 2026, from https://scientificconverters.com/hydraulic-conductivity/millimeters-per-hour-to-centimeters-per-hour/
IEEE
Scientific Converters, "Millimetres per Hour to Centimetres per Hour (mm/h to cm/h)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/hydraulic-conductivity/millimeters-per-hour-to-centimeters-per-hour/