Convert Inches per Hour to Feet per Day (in/h to ft/day)
1 inch per hour (in/h) = 2 feet per day (ft/day). 1 ft/day = 0.5 in/h. Example: 15 in/h = 15 × 2 = 30 ft/day.
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1 in/h = 2 ft/day
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk inch per hour to foot per day converter to paste a column from Excel.
How to Convert Inch per Hour to Foot per Day
- 1 in/h = 2 ft/day
- 1 ft/day = 0.5 in/h
- Example: convert 15 in/h to ft/day: 15 in/h = 15 × 2 ft/day = 30 ft/day
Formula
ft/day = in/h × 2
Derivation from SI units:
- 1 in/h = 0.0254/3600 m/s.
- 1 ft/day = 0.3048/86,400 m/s.
- 1 in/h = 0.000007055555555556 m/s ÷ 0.000003527777777778 m/s per ft/day = 2 ft/day
Both units are defined exactly, so the factor is exact. Inch per Hour definition: inch per hour; Foot per Day definition: foot per day.
Worked examples
- A reading of 0.5 in/h converts to 1 ft/day.
0.5 in/h × 2 = 1 ft/day - A value of 3 in/h is 6 ft/day.
3 in/h × 2 = 6 ft/day
Inch per Hour to Foot per Day conversion table
| Inches per Hour (in/h) | Feet per Day (ft/day) |
|---|---|
| 0.05 in/h | 0.1 ft/day |
| 0.1 in/h | 0.2 ft/day |
| 0.2 in/h | 0.4 ft/day |
| 0.5 in/h | 1 ft/day |
| 1 in/h | 2 ft/day |
| 2 in/h | 4 ft/day |
| 3 in/h | 6 ft/day |
| 5 in/h | 10 ft/day |
| 10 in/h | 20 ft/day |
| 20 in/h | 40 ft/day |
Where it's used
Inches per Hour are used for USDA soil survey permeability classes, while feet per day appear in USGS aquifer reports. Both measure hydraulic conductivity (coefficient of permeability k), so the conversion is a fixed factor.
Inch per Hour to other hydraulic conductivity units
| Conversion | 1 in/h equals |
|---|---|
| inch per hour to foot per day | 2 ft/day |
| inch per hour to metre per second | 0.000007055555556 m/s |
| inch per hour to centimetre per second | 0.0007055555556 cm/s |
| inch per hour to metre per day | 0.6096 m/day |
| inch per hour to centimetre per hour | 2.54 cm/h |
| inch per hour to millimetre per hour | 25.4 mm/h |
| inch per hour to gpd/ft² | 14.96103896 gpd/ft² |
Frequently asked questions
How many feet per day are in 1 inch per hour?
1 in/h = 2 ft/day.
How do I convert inches per hour to feet per day?
Multiply the value in in/h by 2. For example, 15 in/h × 2 = 30 ft/day.
Is the in/h to ft/day conversion exact?
Yes. Both units are defined exactly, and 1 in/h is exactly 2 ft/day.
Sources
- 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, "inch".
- 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, "foot".
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 Inches per Hour to Feet per Day (in/h to ft/day). Retrieved October 29, 2026, from https://scientificconverters.com/hydraulic-conductivity/inches-per-hour-to-feet-per-day/
IEEE
Scientific Converters, "Convert Inches per Hour to Feet per Day (in/h to ft/day)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/hydraulic-conductivity/inches-per-hour-to-feet-per-day/