Convert Gallons per Day per Square Foot to Metres per Day
1 US gallon per day per square foot (gpd/ft²) = 0.04074583333 metres per day (m/day). 1 m/day = 24.54238675 gpd/ft². Example: 15 gpd/ft² = 15 × 0.04074583333 = 0.6111875 m/day.
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1 gpd/ft² = 0.04074583333 m/day
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gpd/ft² to metre per day converter to paste a column from Excel.
How to Convert Gallon per Day per Square Foot to Metre per Day
- 1 gpd/ft² = 0.04074583333 m/day
- 1 m/day = 24.54238675 gpd/ft²
- Example: convert 15 gpd/ft² to m/day: 15 gpd/ft² = 15 × 0.04074583333 m/day = 0.6111875 m/day
Formula
m/day = gpd/ft² × 0.04074583333333
or m/day = gpd/ft² ÷ 24.54238674711
Derivation from SI units:
- 1 gpd/ft² = 0.003785411784 m³ ÷ 86,400 s ÷ 0.09290304 m².
- 1 m/day = 1/86,400 m/s.
- 1 gpd/ft² = 4.715952932099 × 10⁻⁷ m/s ÷ 0.00001157407407407 m/s per m/day = 0.04074583333333 m/day
Both units are defined exactly, so the factor is exact. Gallon per Day per Square Foot definition: US gallon per day per square foot; Metre per Day definition: metre per day.
Worked examples
- A reading of 100 gpd/ft² converts to 4.074583333 m/day.
100 gpd/ft² × 0.04074583333 = 4.074583333 m/day - A value of 1000 gpd/ft² is 40.74583333 m/day.
1000 gpd/ft² × 0.04074583333 = 40.74583333 m/day
Gallon per Day per Square Foot to Metre per Day conversion table
| Gallons per Day per Square Foot (gpd/ft²) | Metres per Day (m/day) |
|---|---|
| 1 gpd/ft² | 0.04074583333 m/day |
| 10 gpd/ft² | 0.4074583333 m/day |
| 50 gpd/ft² | 2.037291667 m/day |
| 100 gpd/ft² | 4.074583333 m/day |
| 200 gpd/ft² | 8.149166667 m/day |
| 500 gpd/ft² | 20.37291667 m/day |
| 1000 gpd/ft² | 40.74583333 m/day |
| 2000 gpd/ft² | 81.49166667 m/day |
| 5000 gpd/ft² | 203.7291667 m/day |
| 10000 gpd/ft² | 407.4583333 m/day |
Where it's used
Gallons per Day per Square Foot are used for older USGS and well-driller reports, while metres per day appear in aquifer transmissivity T = K b (m²/day). Both measure hydraulic conductivity (coefficient of permeability k), so the conversion is a fixed factor.
Gallon per Day per Square Foot to other hydraulic conductivity units
| Conversion | 1 gpd/ft² equals |
|---|---|
| gpd/ft² to metre per day | 0.04074583333 m/day |
| gpd/ft² to metre per second | 4.715952932 × 10⁻⁷ m/s |
| gpd/ft² to centimetre per second | 0.00004715952932 cm/s |
| gpd/ft² to centimetre per hour | 0.1697743056 cm/h |
| gpd/ft² to millimetre per hour | 1.697743056 mm/h |
| gpd/ft² to foot per day | 0.1336805556 ft/day |
| gpd/ft² to inch per hour | 0.06684027778 in/h |
Frequently asked questions
How many metres per day are in 1 US gallon per day per square foot?
1 gpd/ft² = 0.04074583333 m/day.
How do I convert US gallons per day per square foot to metres per day?
Multiply the value in gpd/ft² by 0.04074583333, or divide it by 24.54238675. For example, 15 gpd/ft² × 0.04074583333 = 0.6111875 m/day.
Is the gpd/ft² to m/day 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
- 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.)".
- 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). Convert Gallons per Day per Square Foot to Metres per Day. Retrieved October 29, 2026, from https://scientificconverters.com/hydraulic-conductivity/gallons-per-day-per-square-foot-to-meters-per-day/
IEEE
Scientific Converters, "Convert Gallons per Day per Square Foot to Metres per Day," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/hydraulic-conductivity/gallons-per-day-per-square-foot-to-meters-per-day/