Volumetric flow rate.
Cubic Kilometer per Seconds to Cubic Millimeter per Hours Converter — km3/s to mm3/h
Convert Cubic Kilometer per Seconds (km3/s) to Cubic Millimeter per Hours (mm3/h) using the exact conversion factor (1 cubic kilometer per seconds = 3.6e+21 cubic millimeter per hours). See the formula, worked examples, and conversion table.
Cubic Kilometer per Seconds to Cubic Millimeter per Hours 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 1e+9 / 2.77777778e-13.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Cubic Kilometer per Seconds to Cubic Millimeter per Hours
Cubic Kilometer per Seconds and Cubic Millimeter per Hours 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 millimeter per hours = cubic kilometer per seconds × 3.6e+21
This factor comes from each unit's defined relationship to the category's base unit: 1 cubic kilometer per seconds equals 1000000000 base units, and 1 cubic millimeter per hours equals 2.777778e-13 base units, so dividing one by the other gives the direct cubic kilometer per seconds-to-cubic millimeter per hours factor of 3.6e+21.
Simple example
1 km3/s × 3.6e+21 = 3.6e+21 mm3/h
1 cubic kilometer per seconds = 3.6e+21 cubic millimeter per hours.
Real-world example
60 km3/s × 3.6e+21 = 2.16e+23 mm3/h
60 cubic kilometer per seconds = 2.16e+23 cubic millimeter per hours.
Conversion table
| Cubic Kilometer per Seconds (km3/s) | Cubic Millimeter per Hours (mm3/h) |
|---|---|
| 0.1 km3/s | 3.6e+20 mm3/h |
| 1 km3/s | 3.6e+21 mm3/h |
| 10 km3/s | 3.6e+22 mm3/h |
| 60 km3/s | 2.16e+23 mm3/h |
| 100 km3/s | 3.6e+23 mm3/h |
| 1,000 km3/s | 3.6e+24 mm3/h |
Reverse conversion: Cubic Millimeter per Hours to Cubic Kilometer per Seconds
3.6e+21 mm3/h × 2.777778e-22 = 1 km3/s
3.6e+21 cubic millimeter per hours = 1 cubic kilometer per seconds.
cubic kilometer per seconds = cubic millimeter per hours × 2.777778e-22
For a page dedicated to this direction, see Cubic Millimeter per Hours to Cubic Kilometer per Seconds.
Understanding the Cubic Kilometer per Seconds (km3/s)
Volumetric flow rate.
Understanding the Cubic Millimeter per Hours (mm3/h)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic millimeter per hours are in 1 cubic kilometer per seconds?
1 cubic kilometer per seconds equals 3.6e+21 cubic millimeter per hours, using the exact defined conversion factor rather than an estimate.
How do I convert cubic kilometer per seconds to cubic millimeter per hours?
Multiply the cubic kilometer per seconds value by 3.6e+21. The converter above does this instantly to whatever precision you set.
How do I convert cubic millimeter per hours back to cubic kilometer per seconds?
Use the reverse factor: 1 cubic millimeter per hours equals 2.777778e-22 cubic kilometer per seconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a cubic kilometer per seconds?
Cubic Kilometer per Seconds (km3/s) is a unit of flow rate.
What is a cubic millimeter per hours?
Cubic Millimeter per Hours (mm3/h) is a unit of flow rate.
Is the cubic kilometer per seconds to cubic millimeter per hours conversion exact?
Yes. Both cubic kilometer per seconds and cubic millimeter per hours are defined by fixed standards rather than physical artifacts, so the factor of 3.6e+21 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.