Volumetric flow rate.
Quart per Days to Gallons per Millisecond Converter — qt/d to gal/ms
Convert Quart per Days (qt/d) to Gallon per Millisecond (gal/ms) using the exact conversion factor (1 quart per days = 2.893519e-9 gallon per millisecond). See the formula, worked examples, and conversion table.
Quart per Days 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 1.09531591e-8 / 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 Days to Gallons per Millisecond
Quart per Days 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 days × 2.893519e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 quart per days equals 1.095316e-8 base units, and 1 gallon per millisecond equals 3.785411784 base units, so dividing one by the other gives the direct quart per days-to-gallon per millisecond factor of 2.893519e-9.
Simple example
1 qt/d × 2.893519e-9 = 2.893519e-9 gal/ms
1 quart per days = 2.893519e-9 gallons per millisecond.
Real-world example
60 qt/d × 2.893519e-9 = 1.736111e-7 gal/ms
60 quart per days = 1.736111e-7 gallons per millisecond.
Conversion table
| Quart per Days (qt/d) | Gallon per Millisecond (gal/ms) |
|---|---|
| 0.1 qt/d | 2.893519e-10 gal/ms |
| 1 qt/d | 2.893519e-9 gal/ms |
| 10 qt/d | 2.893519e-8 gal/ms |
| 60 qt/d | 1.736111e-7 gal/ms |
| 100 qt/d | 2.893519e-7 gal/ms |
| 1,000 qt/d | 0.0000028935 gal/ms |
Reverse conversion: Gallon per Millisecond to Quart per Days
2.893519e-9 gal/ms × 345600000 = 1.000000166 qt/d
2.893519e-9 gallons per millisecond = 1.000000166 quart per days.
quart per days = gallons per millisecond × 345600000
For a page dedicated to this direction, see Gallon per Millisecond to Quart per Days.
Understanding the Quart per Days (qt/d)
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 days?
1 quart per days equals 2.893519e-9 gallons per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert quart per days to gallon per millisecond?
Multiply the quart per days value by 2.893519e-9. The converter above does this instantly to whatever precision you set.
How do I convert gallon per millisecond back to quart per days?
Use the reverse factor: 1 gallon per millisecond equals 345,600,000 quart per days. You can also use the swap control in the converter above to flip the direction instantly.
What is a quart per days?
Quart per Days (qt/d) 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 days to gallon per millisecond conversion exact?
Yes. Both quart per days and gallon per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 2.893519e-9 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.