Volumetric flow rate.
Gallon per Minutes to Cups per Millisecond Converter — gal/min to cup/ms
Convert Gallon per Minutes (gal/min) to Cup per Millisecond (cup/ms) using the exact conversion factor (1 gallon per minutes = 0.0002666667 cup per millisecond). See the formula, worked examples, conversion table, and common uses.
Gallon per Minutes to Cups per Millisecond 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 6.30901964e-5 / 0.2365882365.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Gallon per Minutes to Cups per Millisecond
Gallon per Minutes and Cup per Millisecond 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. Gallon per Minutes is most often used for us residential and commercial plumbing fixture flow ratings.
Formula
cups per millisecond = gallon per minutes × 0.000266666666667
This factor comes from each unit's defined relationship to the category's base unit: 1 gallon per minutes equals 0.0000630901964 base units, and 1 cup per millisecond equals 0.2365882365 base units, so dividing one by the other gives the direct gallon per minutes-to-cup per millisecond factor of 0.000266666666667.
Simple example
1 gal/min × 0.0002666666667 = 0.0002666667 cup/ms
1 gallon per minutes = 0.0002666667 cups per millisecond.
Real-world example
60 gal/min × 0.0002666666667 = 0.016 cup/ms
60 gallon per minutes = 0.016 cups per millisecond.
Conversion table
| Gallon per Minutes (gal/min) | Cup per Millisecond (cup/ms) |
|---|---|
| 0.1 gal/min | 0.0000266667 cup/ms |
| 1 gal/min | 0.0002666667 cup/ms |
| 10 gal/min | 0.0026666667 cup/ms |
| 60 gal/min | 0.016 cup/ms |
| 100 gal/min | 0.0266666667 cup/ms |
| 1,000 gal/min | 0.2666666667 cup/ms |
Reverse conversion: Cup per Millisecond to Gallon per Minutes
0.0002666667 cup/ms × 3750 = 1.000000125 gal/min
0.0002666667 cups per millisecond = 1.000000125 gallon per minutes.
gallon per minutes = cups per millisecond × 3750
For a page dedicated to this direction, see Cup per Millisecond to Gallon per Minutes.
Understanding the Gallon per Minutes
Gallon per Minutes (gal/min) measures volumetric flow rate. The standard US unit for pump, plumbing, and irrigation flow-rate specifications. It is classified as a US customary flow-rate unit.
Where it's used: United States (plumbing, pump, and irrigation industry standard)
Uses of the Gallon per Minutes today
- US residential and commercial plumbing fixture flow ratings
- US pump and irrigation system specifications
- US pool and spa filtration system sizing
Understanding the Cup per Millisecond (cup/ms)
Volumetric flow rate.
Gallon per Minutes — sources
- NIST Handbook 44 — General tables of units including US customary flow-rate measures.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cups per millisecond are in 1 gallon per minutes?
1 gallon per minutes equals 0.0002666667 cups per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per minutes to cup per millisecond?
Multiply the gallon per minutes value by 0.0002666666667. The converter above does this instantly to whatever precision you set.
How do I convert cup per millisecond back to gallon per minutes?
Use the reverse factor: 1 cup per millisecond equals 3,750 gallon per minutes. You can also use the swap control in the converter above to flip the direction instantly.
What is a gallon per minutes?
Gallon per Minutes (gal/min) measures volumetric flow rate. The standard US unit for pump, plumbing, and irrigation flow-rate specifications. It is classified as a US customary flow-rate unit.
What is a cup per millisecond?
Cup per Millisecond (cup/ms) is a unit of flow rate.
Is the gallon per minutes to cup per millisecond conversion exact?
Yes. Both gallon per minutes and cup per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 0.0002666666667 used above is exact to as many digits as you choose to display.
Where is the gallon per minutes still used today?
United States (plumbing, pump, and irrigation industry standard)
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.