Convert Feet per Day to Inches per Hour (ft/day to in/h)
1 foot per day (ft/day) = 0.5 inches per hour (in/h). 1 in/h = 2 ft/day. Example: 15 ft/day = 15 × 0.5 = 7.5 in/h.
Also searched as feet per day to in/h, feet per day in in/h, feet per day into inches per hour, ft/day to in/h, ft/day in inches per hour, ft/day into inch per hour, foot per day to inch per hour, ft/day to inches per hour converter and how many inches per hour in a foot per day.
1 ft/day = 0.5 in/h
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk foot per day to inch per hour converter to paste a column from Excel.
How to Convert Foot per Day to Inch per Hour
- 1 ft/day = 0.5 in/h
- 1 in/h = 2 ft/day
- Example: convert 15 ft/day to in/h: 15 ft/day = 15 × 0.5 in/h = 7.5 in/h
Formula
in/h = ft/day ÷ 2
Derivation from SI units:
- 1 ft/day = 0.3048/86,400 m/s.
- 1 in/h = 0.0254/3600 m/s.
- 1 ft/day = 0.000003527777777778 m/s ÷ 0.000007055555555556 m/s per in/h = 0.5 in/h
Both units are defined exactly, so the factor is exact. Foot per Day definition: foot per day; Inch per Hour definition: inch per hour.
Worked examples
- A reading of 3 ft/day converts to 1.5 in/h.
3 ft/day × 0.5 = 1.5 in/h - A value of 50 ft/day is 25 in/h.
50 ft/day × 0.5 = 25 in/h
Foot per Day to Inch per Hour conversion table
| Feet per Day (ft/day) | Inches per Hour (in/h) |
|---|---|
| 0.01 ft/day | 0.005 in/h |
| 0.1 ft/day | 0.05 in/h |
| 1 ft/day | 0.5 in/h |
| 3 ft/day | 1.5 in/h |
| 10 ft/day | 5 in/h |
| 30 ft/day | 15 in/h |
| 50 ft/day | 25 in/h |
| 100 ft/day | 50 in/h |
| 300 ft/day | 150 in/h |
| 1000 ft/day | 500 in/h |
Where it's used
Feet per Day are used for USGS aquifer reports, while inches per hour appear in USDA soil survey permeability classes. Both measure hydraulic conductivity (coefficient of permeability k), so the conversion is a fixed factor.
Foot per Day to other hydraulic conductivity units
| Conversion | 1 ft/day equals |
|---|---|
| foot per day to inch per hour | 0.5 in/h |
| foot per day to metre per second | 0.000003527777778 m/s |
| foot per day to centimetre per second | 0.0003527777778 cm/s |
| foot per day to metre per day | 0.3048 m/day |
| foot per day to centimetre per hour | 1.27 cm/h |
| foot per day to millimetre per hour | 12.7 mm/h |
| foot per day to gpd/ft² | 7.480519481 gpd/ft² |
Frequently asked questions
How many inches per hour are in 1 foot per day?
1 ft/day = 0.5 in/h.
How do I convert feet per day to inches per hour?
Multiply the value in ft/day by 0.5, or divide it by 2. For example, 15 ft/day × 0.5 = 7.5 in/h.
Is the ft/day to in/h conversion exact?
Yes. Both units are defined exactly, and 1 ft/day is exactly 0.5 in/h.
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, "foot".
- 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".
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 Feet per Day to Inches per Hour (ft/day to in/h). Retrieved October 29, 2026, from https://scientificconverters.com/hydraulic-conductivity/feet-per-day-to-inches-per-hour/
IEEE
Scientific Converters, "Convert Feet per Day to Inches per Hour (ft/day to in/h)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/hydraulic-conductivity/feet-per-day-to-inches-per-hour/