Volumetric flow rate.
Gallon per Minutes to Cup per Seconds Converter — gal/min to cup/s
Convert Gallon per Minutes (gal/min) to Cup per Seconds (cup/s) using the exact conversion factor (1 gallon per minutes = 0.2666666667 cup per seconds). See the formula, worked examples, conversion table, and common uses.
Gallon per Minutes to Cup per Seconds 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 / 0.0002365882365.
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 Cup per Seconds
Gallon per Minutes and Cup per Seconds 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
cup per seconds = gallon per minutes × 0.266666666667
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 seconds equals 0.0002365882365 base units, so dividing one by the other gives the direct gallon per minutes-to-cup per seconds factor of 0.266666666667.
Simple example
1 gal/min × 0.2666666667 = 0.2666666667 cup/s
1 gallon per minutes = 0.2666666667 cup per seconds.
Real-world example
60 gal/min × 0.2666666667 = 16 cup/s
60 gallon per minutes = 16 cup per seconds.
Conversion table
| Gallon per Minutes (gal/min) | Cup per Seconds (cup/s) |
|---|---|
| 0.1 gal/min | 0.0266666667 cup/s |
| 1 gal/min | 0.2666666667 cup/s |
| 10 gal/min | 2.666666667 cup/s |
| 60 gal/min | 16 cup/s |
| 100 gal/min | 26.66666667 cup/s |
| 1,000 gal/min | 266.6666667 cup/s |
Reverse conversion: Cup per Seconds to Gallon per Minutes
0.2666666667 cup/s × 3.75 = 1 gal/min
0.2666666667 cup per seconds = 1 gallon per minutes.
gallon per minutes = cup per seconds × 3.75
For a page dedicated to this direction, see Cup per Seconds 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 Seconds (cup/s)
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 cup per seconds are in 1 gallon per minutes?
1 gallon per minutes equals 0.2666666667 cup per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per minutes to cup per seconds?
Multiply the gallon per minutes value by 0.2666666667. The converter above does this instantly to whatever precision you set.
How do I convert cup per seconds back to gallon per minutes?
Use the reverse factor: 1 cup per seconds equals 3.75 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 seconds?
Cup per Seconds (cup/s) is a unit of flow rate.
Is the gallon per minutes to cup per seconds conversion exact?
Yes. Both gallon per minutes and cup per seconds are defined by fixed standards rather than physical artifacts, so the factor of 0.2666666667 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.