Volumetric flow rate.
Quart per Hours to Gallons per Millisecond Converter — qt/h to gal/ms
Convert Quart per Hours (qt/h) to Gallon per Millisecond (gal/ms) using the exact conversion factor (1 quart per hours = 6.944444e-8 gallon per millisecond). See the formula, worked examples, and conversion table.
Quart per Hours 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 2.62875818e-7 / 3.785411784.
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 Gallons per Millisecond
Quart per Hours 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 = quart per hours × 6.944444e-8
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 millisecond equals 3.785411784 base units, so dividing one by the other gives the direct quart per hours-to-gallon per millisecond factor of 6.944444e-8.
Simple example
1 qt/h × 6.944444e-8 = 6.944444e-8 gal/ms
1 quart per hours = 6.944444e-8 gallons per millisecond.
Real-world example
60 qt/h × 6.944444e-8 = 0.0000041667 gal/ms
60 quart per hours = 0.0000041667 gallons per millisecond.
Conversion table
| Quart per Hours (qt/h) | Gallon per Millisecond (gal/ms) |
|---|---|
| 0.1 qt/h | 6.944444e-9 gal/ms |
| 1 qt/h | 6.944444e-8 gal/ms |
| 10 qt/h | 6.944444e-7 gal/ms |
| 60 qt/h | 0.0000041667 gal/ms |
| 100 qt/h | 0.0000069444 gal/ms |
| 1,000 qt/h | 0.0000694444 gal/ms |
Reverse conversion: Gallon per Millisecond to Quart per Hours
6.944444e-8 gal/ms × 14400000 = 0.999999936 qt/h
6.944444e-8 gallons per millisecond = 0.999999936 quart per hours.
quart per hours = gallons per millisecond × 14400000
For a page dedicated to this direction, see Gallon per Millisecond to Quart per Hours.
Understanding the Quart per Hours (qt/h)
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 hours?
1 quart per hours equals 6.944444e-8 gallons per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert quart per hours to gallon per millisecond?
Multiply the quart per hours value by 6.944444e-8. The converter above does this instantly to whatever precision you set.
How do I convert gallon per millisecond back to quart per hours?
Use the reverse factor: 1 gallon per millisecond equals 14,400,000 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 millisecond?
Gallon per Millisecond (gal/ms) is a unit of flow rate.
Is the quart per hours to gallon per millisecond conversion exact?
Yes. Both quart per hours and gallon per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 6.944444e-8 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.