Volumetric flow rate.
Quart per Days to Gallon per Days Converter — qt/d to gal/d
Convert Quart per Days (qt/d) to Gallon per Days (gal/d) using the exact conversion factor (1 quart per days = 0.25 gallon per days). See the formula, worked examples, and conversion table.
Quart per Days to Gallon per Days 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 / 4.38126364e-8.
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 Gallon per Days
Quart per Days and Gallon per Days 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 days = quart per days × 0.25
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 days equals 4.381264e-8 base units, so dividing one by the other gives the direct quart per days-to-gallon per days factor of 0.25.
Simple example
1 qt/d × 0.25 = 0.25 gal/d
1 quart per days = 0.25 gallon per days.
Real-world example
60 qt/d × 0.25 = 15 gal/d
60 quart per days = 15 gallon per days.
Conversion table
| Quart per Days (qt/d) | Gallon per Days (gal/d) |
|---|---|
| 0.1 qt/d | 0.025 gal/d |
| 1 qt/d | 0.25 gal/d |
| 10 qt/d | 2.5 gal/d |
| 60 qt/d | 15 gal/d |
| 100 qt/d | 25 gal/d |
| 1,000 qt/d | 250 gal/d |
Reverse conversion: Gallon per Days to Quart per Days
0.25 gal/d × 4 = 1 qt/d
0.25 gallon per days = 1 quart per days.
quart per days = gallon per days × 4
For a page dedicated to this direction, see Gallon per Days to Quart per Days.
Understanding the Quart per Days (qt/d)
Volumetric flow rate.
Understanding the Gallon per Days (gal/d)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gallon per days are in 1 quart per days?
1 quart per days equals 0.25 gallon per days, using the exact defined conversion factor rather than an estimate.
How do I convert quart per days to gallon per days?
Multiply the quart per days value by 0.25. The converter above does this instantly to whatever precision you set.
How do I convert gallon per days back to quart per days?
Use the reverse factor: 1 gallon per days equals 4 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 days?
Gallon per Days (gal/d) is a unit of flow rate.
Is the quart per days to gallon per days conversion exact?
Yes. Both quart per days and gallon per days 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.