Volumetric flow rate.
Quart per Minutes to Gallon per Minutes Converter — qt/min to gal/min
Convert Quart per Minutes (qt/min) to Gallon per Minutes (gal/min) using the exact conversion factor (1 quart per minutes = 0.25 gallon per minutes). See the formula, worked examples, conversion table, and common uses.
Quart per Minutes to Gallon per Minutes 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 1.57725491e-5 / 6.30901964e-5.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Quart per Minutes to Gallon per Minutes
Quart per Minutes and Gallon per Minutes 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
gallon per minutes = quart per minutes × 0.25
This factor comes from each unit's defined relationship to the category's base unit: 1 quart per minutes equals 0.0000157725491 base units, and 1 gallon per minutes equals 0.0000630901964 base units, so dividing one by the other gives the direct quart per minutes-to-gallon per minutes factor of 0.25.
Simple example
1 qt/min × 0.25 = 0.25 gal/min
1 quart per minutes = 0.25 gallon per minutes.
Real-world example
60 qt/min × 0.25 = 15 gal/min
60 quart per minutes = 15 gallon per minutes.
Conversion table
| Quart per Minutes (qt/min) | Gallon per Minutes (gal/min) |
|---|---|
| 0.1 qt/min | 0.025 gal/min |
| 1 qt/min | 0.25 gal/min |
| 10 qt/min | 2.5 gal/min |
| 60 qt/min | 15 gal/min |
| 100 qt/min | 25 gal/min |
| 1,000 qt/min | 250 gal/min |
Reverse conversion: Gallon per Minutes to Quart per Minutes
0.25 gal/min × 4 = 1 qt/min
0.25 gallon per minutes = 1 quart per minutes.
quart per minutes = gallon per minutes × 4
For a page dedicated to this direction, see Gallon per Minutes to Quart per Minutes.
Understanding the Quart per Minutes (qt/min)
Volumetric flow rate.
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
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 gallon per minutes are in 1 quart per minutes?
1 quart per minutes equals 0.25 gallon per minutes, using the exact defined conversion factor rather than an estimate.
How do I convert quart per minutes to gallon per minutes?
Multiply the quart per minutes value by 0.25. The converter above does this instantly to whatever precision you set.
How do I convert gallon per minutes back to quart per minutes?
Use the reverse factor: 1 gallon per minutes equals 4 quart per minutes. You can also use the swap control in the converter above to flip the direction instantly.
What is a quart per minutes?
Quart per Minutes (qt/min) is a unit of flow rate.
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.
Is the quart per minutes to gallon per minutes conversion exact?
Yes. Both quart per minutes and gallon per minutes are defined by fixed standards rather than physical artifacts, so the factor of 0.25 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.