Volumetric flow rate.
Quart per Hours to Gallon per Hours Converter — qt/h to gal/h
Convert Quart per Hours (qt/h) to Gallon per Hours (gal/h) using the exact conversion factor (1 quart per hours = 0.25 gallon per hours). See the formula, worked examples, and conversion table.
Quart per Hours to Gallon 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 2.62875818e-7 / 1.05150327e-6.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Quart per Hours to Gallon per Hours
Quart per Hours and Gallon 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
gallon per hours = quart per hours × 0.25
This factor comes from each unit's defined relationship to the category's base unit: 1 quart per hours equals 2.628758e-7 base units, and 1 gallon per hours equals 0.00000105150327333 base units, so dividing one by the other gives the direct quart per hours-to-gallon per hours factor of 0.25.
Simple example
1 qt/h × 0.25 = 0.25 gal/h
1 quart per hours = 0.25 gallon per hours.
Real-world example
60 qt/h × 0.25 = 15 gal/h
60 quart per hours = 15 gallon per hours.
Conversion table
| Quart per Hours (qt/h) | Gallon per Hours (gal/h) |
|---|---|
| 0.1 qt/h | 0.025 gal/h |
| 1 qt/h | 0.25 gal/h |
| 10 qt/h | 2.5 gal/h |
| 60 qt/h | 15 gal/h |
| 100 qt/h | 25 gal/h |
| 1,000 qt/h | 250 gal/h |
Reverse conversion: Gallon per Hours to Quart per Hours
0.25 gal/h × 4 = 1 qt/h
0.25 gallon per hours = 1 quart per hours.
quart per hours = gallon per hours × 4
For a page dedicated to this direction, see Gallon per Hours to Quart per Hours.
Understanding the Quart per Hours (qt/h)
Volumetric flow rate.
Understanding the Gallon per Hours (gal/h)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gallon per hours are in 1 quart per hours?
1 quart per hours equals 0.25 gallon per hours, using the exact defined conversion factor rather than an estimate.
How do I convert quart per hours to gallon per hours?
Multiply the quart per hours value by 0.25. The converter above does this instantly to whatever precision you set.
How do I convert gallon per hours back to quart per hours?
Use the reverse factor: 1 gallon per hours equals 4 quart per hours. You can also use the swap control in the converter above to flip the direction instantly.
What is a quart per hours?
Quart per Hours (qt/h) is a unit of flow rate.
What is a gallon per hours?
Gallon per Hours (gal/h) is a unit of flow rate.
Is the quart per hours to gallon per hours conversion exact?
Yes. Both quart per hours and gallon per hours 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.