Convert Centimetres per Hour to gpd/ft²
1 centimetre per hour (cm/h) = 5.890172819 US gallons per day per square foot (gpd/ft²). 1 gpd/ft² = 0.1697743056 cm/h. Example: 15 cm/h = 15 × 5.890172819 = 88.35259229 gpd/ft².
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1 cm/h = 5.890172819 gpd/ft²
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk centimetre per hour to gpd/ft² converter to paste a column from Excel.
How to Convert Centimetre per Hour to Gallon per Day per Square Foot
- 1 cm/h = 5.890172819 gpd/ft²
- 1 gpd/ft² = 0.1697743056 cm/h
- Example: convert 15 cm/h to gpd/ft²: 15 cm/h = 15 × 5.890172819 gpd/ft² = 88.35259229 gpd/ft²
Formula
gpd/ft² = cm/h × 5.890172819307
Derivation from SI units:
- 1 cm/h = 0.01/3600 m/s.
- 1 gpd/ft² = 0.003785411784 m³ ÷ 86,400 s ÷ 0.09290304 m².
- 1 cm/h = 0.000002777777777778 m/s ÷ 4.715952932099 × 10⁻⁷ m/s per gpd/ft² = 5.890172819307 gpd/ft²
Both units are defined exactly, so the factor is exact. Centimetre per Hour definition: centimetre per hour; Gallon per Day per Square Foot definition: US gallon per day per square foot.
Worked examples
- A reading of 2 cm/h converts to 11.78034564 gpd/ft².
2 cm/h × 5.890172819 = 11.78034564 gpd/ft² - A value of 6.25 cm/h is 36.81358012 gpd/ft².
6.25 cm/h × 5.890172819 = 36.81358012 gpd/ft²
Centimetre per Hour to Gallon per Day per Square Foot conversion table
| Centimetres per Hour (cm/h) | Gallons per Day per Square Foot (gpd/ft²) |
|---|---|
| 0.1 cm/h | 0.5890172819 gpd/ft² |
| 0.5 cm/h | 2.94508641 gpd/ft² |
| 1 cm/h | 5.890172819 gpd/ft² |
| 2 cm/h | 11.78034564 gpd/ft² |
| 2.5 cm/h | 14.72543205 gpd/ft² |
| 5 cm/h | 29.4508641 gpd/ft² |
| 6.25 cm/h | 36.81358012 gpd/ft² |
| 10 cm/h | 58.90172819 gpd/ft² |
| 12.5 cm/h | 73.62716024 gpd/ft² |
| 25 cm/h | 147.2543205 gpd/ft² |
Where it's used
Centimetres per Hour are used for infiltration capacity and Horton’s equation, while US gallons per day per square foot appear in older USGS and well-driller reports. 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 gpd/ft² | 5.890172819 gpd/ft² |
| 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 millimetre per hour | 10 mm/h |
| centimetre per hour to foot per day | 0.7874015748 ft/day |
| centimetre per hour to inch per hour | 0.3937007874 in/h |
Frequently asked questions
How many US gallons per day per square foot are in 1 centimetre per hour?
1 cm/h = 5.890172819 gpd/ft².
How do I convert centimetres per hour to US gallons per day per square foot?
Multiply the value in cm/h by 5.890172819. For example, 15 cm/h × 5.890172819 = 88.35259229 gpd/ft².
Is the cm/h to gpd/ft² conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
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).
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "gallon (U.S.)".
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). Convert Centimetres per Hour to gpd/ft². Retrieved October 29, 2026, from https://scientificconverters.com/hydraulic-conductivity/centimeters-per-hour-to-gallons-per-day-per-square-foot/
IEEE
Scientific Converters, "Convert Centimetres per Hour to gpd/ft²," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/hydraulic-conductivity/centimeters-per-hour-to-gallons-per-day-per-square-foot/