Volumetric flow rate.
Quarts per Millisecond to Gallon per Seconds Converter — qt/ms to gal/s
Convert Quart per Millisecond (qt/ms) to Gallon per Seconds (gal/s) using the exact conversion factor (1 quart per millisecond = 250 gallon per seconds). See the formula, worked examples, and conversion table.
Quarts per Millisecond to Gallon 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 0.946352946 / 0.003785411784.
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 Gallon per Seconds
Quart per Millisecond and Gallon 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. Both are volumetric flow rate units.
Formula
gallon per seconds = quarts per millisecond × 250
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 seconds equals 0.003785411784 base units, so dividing one by the other gives the direct quart per millisecond-to-gallon per seconds factor of 250.
Simple example
1 qt/ms × 250 = 250 gal/s
1 quart per millisecond = 250 gallon per seconds.
Real-world example
60 qt/ms × 250 = 15,000 gal/s
60 quarts per millisecond = 15,000 gallon per seconds.
Conversion table
| Quart per Millisecond (qt/ms) | Gallon per Seconds (gal/s) |
|---|---|
| 0.1 qt/ms | 25 gal/s |
| 1 qt/ms | 250 gal/s |
| 10 qt/ms | 2,500 gal/s |
| 60 qt/ms | 15,000 gal/s |
| 100 qt/ms | 25,000 gal/s |
| 1,000 qt/ms | 250,000 gal/s |
Reverse conversion: Gallon per Seconds to Quart per Millisecond
250 gal/s × 0.004 = 1 qt/ms
250 gallon per seconds = 1 quarts per millisecond.
quarts per millisecond = gallon per seconds × 0.004
For a page dedicated to this direction, see Gallon per Seconds to Quart per Millisecond.
Understanding the Quart per Millisecond (qt/ms)
Volumetric flow rate.
Understanding the Gallon per Seconds (gal/s)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gallon per seconds are in 1 quart per millisecond?
1 quart per millisecond equals 250 gallon per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert quart per millisecond to gallon per seconds?
Multiply the quart per millisecond value by 250. The converter above does this instantly to whatever precision you set.
How do I convert gallon per seconds back to quart per millisecond?
Use the reverse factor: 1 gallon per seconds equals 0.004 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 seconds?
Gallon per Seconds (gal/s) is a unit of flow rate.
Is the quart per millisecond to gallon per seconds conversion exact?
Yes. Both quart per millisecond and gallon per seconds are defined by fixed standards rather than physical artifacts, so the factor of 250 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.