Volumetric flow rate.
Gallon per Days to Cubic Kilometers per Millisecond Converter — gal/d to km3/ms
Convert Gallon per Days (gal/d) to Cubic Kilometer per Millisecond (km3/ms) using the exact conversion factor (1 gallon per days = 4.381264e-20 cubic kilometer per millisecond). See the formula, worked examples, and conversion table.
Gallon per Days to Cubic Kilometers 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 4.38126364e-8 / 1e+12.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Gallon per Days to Cubic Kilometers per Millisecond
Gallon per Days and Cubic Kilometer 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
cubic kilometers per millisecond = gallon per days × 4.381264e-20
This factor comes from each unit's defined relationship to the category's base unit: 1 gallon per days equals 4.381264e-8 base units, and 1 cubic kilometer per millisecond equals 1e+12 base units, so dividing one by the other gives the direct gallon per days-to-cubic kilometer per millisecond factor of 4.381264e-20.
Simple example
1 gal/d × 4.381264e-20 = 4.381264e-20 km3/ms
1 gallon per days = 4.381264e-20 cubic kilometers per millisecond.
Real-world example
60 gal/d × 4.381264e-20 = 2.628758e-18 km3/ms
60 gallon per days = 2.628758e-18 cubic kilometers per millisecond.
Conversion table
| Gallon per Days (gal/d) | Cubic Kilometer per Millisecond (km3/ms) |
|---|---|
| 0.1 gal/d | 4.381264e-21 km3/ms |
| 1 gal/d | 4.381264e-20 km3/ms |
| 10 gal/d | 4.381264e-19 km3/ms |
| 60 gal/d | 2.628758e-18 km3/ms |
| 100 gal/d | 4.381264e-18 km3/ms |
| 1,000 gal/d | 4.381264e-17 km3/ms |
Reverse conversion: Cubic Kilometer per Millisecond to Gallon per Days
4.381264e-20 km3/ms × 2.282447e+19 = 1.000000082 gal/d
4.381264e-20 cubic kilometers per millisecond = 1.000000082 gallon per days.
gallon per days = cubic kilometers per millisecond × 2.282447e+19
For a page dedicated to this direction, see Cubic Kilometer per Millisecond to Gallon per Days.
Understanding the Gallon per Days (gal/d)
Volumetric flow rate.
Understanding the Cubic Kilometer per Millisecond (km3/ms)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic kilometers per millisecond are in 1 gallon per days?
1 gallon per days equals 4.381264e-20 cubic kilometers per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per days to cubic kilometer per millisecond?
Multiply the gallon per days value by 4.381264e-20. The converter above does this instantly to whatever precision you set.
How do I convert cubic kilometer per millisecond back to gallon per days?
Use the reverse factor: 1 cubic kilometer per millisecond equals 2.282447e+19 gallon per days. You can also use the swap control in the converter above to flip the direction instantly.
What is a gallon per days?
Gallon per Days (gal/d) is a unit of flow rate.
What is a cubic kilometer per millisecond?
Cubic Kilometer per Millisecond (km3/ms) is a unit of flow rate.
Is the gallon per days to cubic kilometer per millisecond conversion exact?
Yes. Both gallon per days and cubic kilometer per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 4.381264e-20 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.