Volumetric flow rate.
Gallon per Days to Cubic Meter per Hours Converter — gal/d to m3/h
Convert Gallon per Days (gal/d) to Cubic Meter per Hours (m3/h) using the exact conversion factor (1 gallon per days = 0.0001577255 cubic meter per hours). See the formula, worked examples, conversion table, and common uses.
Gallon per Days to Cubic Meter per Hours converter
Converter
Flow Rate Converter
Convert volumetric flow rates across metric, US, imperial, industrial, and scientific units.
Context values
Some unit families need one extra value for a physically accurate result.
Volumetric flow rate.
Result = input x 4.38126364e-8 / 0.0002777777778.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Gallon per Days to Cubic Meter per Hours
Gallon per Days and Cubic Meter per Hours both measure volumetric flow rate — how much volume passes a point over time — used to size pipes and pumps, monitor river or stream discharge, control industrial processes, and set medical infusion rates. Both are volumetric flow rate units.
Formula
cubic meter per hours = gallon per days × 0.000157725491
This factor comes from each unit's defined relationship to the category's base unit: 1 gallon per days equals 4.381264e-8 base units, and 1 cubic meter per hours equals 0.000277777777778 base units, so dividing one by the other gives the direct gallon per days-to-cubic meter per hours factor of 0.000157725491.
Simple example
1 gal/d × 0.000157725491 = 0.0001577255 m3/h
1 gallon per days = 0.0001577255 cubic meter per hours.
Real-world example
60 gal/d × 0.000157725491 = 0.0094635295 m3/h
60 gallon per days = 0.0094635295 cubic meter per hours.
Conversion table
| Gallon per Days (gal/d) | Cubic Meter per Hours (m3/h) |
|---|---|
| 0.1 gal/d | 0.0000157725 m3/h |
| 1 gal/d | 0.0001577255 m3/h |
| 10 gal/d | 0.0015772549 m3/h |
| 60 gal/d | 0.0094635295 m3/h |
| 100 gal/d | 0.0157725491 m3/h |
| 1,000 gal/d | 0.157725491 m3/h |
Reverse conversion: Cubic Meter per Hours to Gallon per Days
0.0001577255 m3/h × 6340.129257 = 1.000000057 gal/d
0.0001577255 cubic meter per hours = 1.000000057 gallon per days.
gallon per days = cubic meter per hours × 6340.1292566
For a page dedicated to this direction, see Cubic Meter per Hours to Gallon per Days.
Understanding the Gallon per Days (gal/d)
Volumetric flow rate.
Understanding the Cubic Meter per Hours
Cubic Meter per Hours (m3/h) measures volumetric flow rate. One cubic meter of volume passing a point every hour — a common scale for equipment and system flow ratings. It is classified as a metric derived flow-rate unit.
Where it's used: Standard flow-rate unit for HVAC and industrial equipment ratings internationally, outside the US
Uses of the Cubic Meter per Hours today
- HVAC equipment airflow and liquid-flow ratings
- Industrial pump and system flow specifications
- Building ventilation system design
Cubic Meter per Hours — sources
- ISO 5167 (flow measurement standards) — Cubic meters per hour as a standard industrial flow-rate unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic meter per hours are in 1 gallon per days?
1 gallon per days equals 0.0001577255 cubic meter per hours, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per days to cubic meter per hours?
Multiply the gallon per days value by 0.000157725491. The converter above does this instantly to whatever precision you set.
How do I convert cubic meter per hours back to gallon per days?
Use the reverse factor: 1 cubic meter per hours equals 6,340.129257 gallon per days. You can also use the swap control in the converter above to flip the direction instantly.
What is a gallon per days?
Gallon per Days (gal/d) is a unit of flow rate.
What is a cubic meter per hours?
Cubic Meter per Hours (m3/h) measures volumetric flow rate. One cubic meter of volume passing a point every hour — a common scale for equipment and system flow ratings. It is classified as a metric derived flow-rate unit.
Is the gallon per days to cubic meter per hours conversion exact?
Yes. Both gallon per days and cubic meter per hours are defined by fixed standards rather than physical artifacts, so the factor of 0.000157725491 used above is exact to as many digits as you choose to display.
What's the difference between volumetric and mass flow rate?
Volumetric flow rate measures the volume of fluid passing a point per unit time (for example, liters per second). Mass flow rate measures the mass instead. For a fluid of constant density the two are directly proportional, but for compressible fluids like gases, mass flow is often the more meaningful quantity.