Volumetric flow rate.
Gallon per Days to Cubic Millimeter per Hours Converter — gal/d to mm3/h
Convert Gallon per Days (gal/d) to Cubic Millimeter per Hours (mm3/h) using the exact conversion factor (1 gallon per days = 157,725.491 cubic millimeter per hours). See the formula, worked examples, and conversion table.
Gallon per Days to Cubic Millimeter 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 / 2.77777778e-13.
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 Millimeter per Hours
Gallon per Days and Cubic Millimeter 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 millimeter per hours = gallon per days × 157725.491
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 millimeter per hours equals 2.777778e-13 base units, so dividing one by the other gives the direct gallon per days-to-cubic millimeter per hours factor of 157725.491.
Simple example
1 gal/d × 157725.491 = 157,725.491 mm3/h
1 gallon per days = 157,725.491 cubic millimeter per hours.
Real-world example
60 gal/d × 157725.491 = 9,463,529.46 mm3/h
60 gallon per days = 9,463,529.46 cubic millimeter per hours.
Conversion table
| Gallon per Days (gal/d) | Cubic Millimeter per Hours (mm3/h) |
|---|---|
| 0.1 gal/d | 15,772.5491 mm3/h |
| 1 gal/d | 157,725.491 mm3/h |
| 10 gal/d | 1,577,254.91 mm3/h |
| 60 gal/d | 9,463,529.46 mm3/h |
| 100 gal/d | 15,772,549.1 mm3/h |
| 1,000 gal/d | 157,725,491 mm3/h |
Reverse conversion: Cubic Millimeter per Hours to Gallon per Days
1 mm3/h × 0.000006340129257 = 0.0000063401 gal/d
1 cubic millimeter per hours = 0.0000063401 gallon per days.
gallon per days = cubic millimeter per hours × 0.0000063401292566
For a page dedicated to this direction, see Cubic Millimeter per Hours to Gallon per Days.
Understanding the Gallon per Days (gal/d)
Volumetric flow rate.
Understanding the Cubic Millimeter per Hours (mm3/h)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic millimeter per hours are in 1 gallon per days?
1 gallon per days equals 157,725.491 cubic millimeter per hours, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per days to cubic millimeter per hours?
Multiply the gallon per days value by 157725.491. The converter above does this instantly to whatever precision you set.
How do I convert cubic millimeter per hours back to gallon per days?
Use the reverse factor: 1 cubic millimeter per hours equals 0.0000063401 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 millimeter per hours?
Cubic Millimeter per Hours (mm3/h) is a unit of flow rate.
Is the gallon per days to cubic millimeter per hours conversion exact?
Yes. Both gallon per days and cubic millimeter per hours are defined by fixed standards rather than physical artifacts, so the factor of 157725.491 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.