Volumetric flow rate.
Quarts per Millisecond to Gallons per Millisecond Converter — qt/ms to gal/ms
Convert Quart per Millisecond (qt/ms) to Gallon per Millisecond (gal/ms) using the exact conversion factor (1 quart per millisecond = 0.25 gallon per millisecond). See the formula, worked examples, and conversion table.
Quarts per Millisecond to Gallons 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 0.946352946 / 3.785411784.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Quarts per Millisecond to Gallons per Millisecond
Quart per Millisecond and Gallon 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. Both are volumetric flow rate units.
Formula
gallons per millisecond = quarts per millisecond × 0.25
This factor comes from each unit's defined relationship to the category's base unit: 1 quart per millisecond equals 0.946352946 base units, and 1 gallon per millisecond equals 3.785411784 base units, so dividing one by the other gives the direct quart per millisecond-to-gallon per millisecond factor of 0.25.
Simple example
1 qt/ms × 0.25 = 0.25 gal/ms
1 quart per millisecond = 0.25 gallons per millisecond.
Real-world example
60 qt/ms × 0.25 = 15 gal/ms
60 quarts per millisecond = 15 gallons per millisecond.
Conversion table
| Quart per Millisecond (qt/ms) | Gallon per Millisecond (gal/ms) |
|---|---|
| 0.1 qt/ms | 0.025 gal/ms |
| 1 qt/ms | 0.25 gal/ms |
| 10 qt/ms | 2.5 gal/ms |
| 60 qt/ms | 15 gal/ms |
| 100 qt/ms | 25 gal/ms |
| 1,000 qt/ms | 250 gal/ms |
Reverse conversion: Gallon per Millisecond to Quart per Millisecond
0.25 gal/ms × 4 = 1 qt/ms
0.25 gallons per millisecond = 1 quart per millisecond.
quarts per millisecond = gallons per millisecond × 4
For a page dedicated to this direction, see Gallon per Millisecond to Quart per Millisecond.
Understanding the Quart per Millisecond (qt/ms)
Volumetric flow rate.
Understanding the Gallon per Millisecond (gal/ms)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gallons per millisecond are in 1 quart per millisecond?
1 quart per millisecond equals 0.25 gallons per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert quart per millisecond to gallon per millisecond?
Multiply the quart per millisecond value by 0.25. The converter above does this instantly to whatever precision you set.
How do I convert gallon per millisecond back to quart per millisecond?
Use the reverse factor: 1 gallon per millisecond equals 4 quarts per millisecond. You can also use the swap control in the converter above to flip the direction instantly.
What is a quart per millisecond?
Quart per Millisecond (qt/ms) is a unit of flow rate.
What is a gallon per millisecond?
Gallon per Millisecond (gal/ms) is a unit of flow rate.
Is the quart per millisecond to gallon per millisecond conversion exact?
Yes. Both quart per millisecond and gallon per millisecond 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.