Volumetric flow rate.
Cubic Meter per Hours to Cubic Kilometer per Seconds Converter — m3/h to km3/s
Convert Cubic Meter per Hours (m3/h) to Cubic Kilometer per Seconds (km3/s) using the exact conversion factor (1 cubic meter per hours = 2.777778e-13 cubic kilometer per seconds). See the formula, worked examples, conversion table, and common uses.
Cubic Meter per Hours to Cubic Kilometer per Seconds 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 0.0002777777778 / 1e+9.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Cubic Meter per Hours to Cubic Kilometer per Seconds
Cubic Meter per Hours and Cubic Kilometer per Seconds 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. Cubic Meter per Hours is most often used for hvac equipment airflow and liquid-flow ratings.
Formula
cubic kilometer per seconds = cubic meter per hours × 2.777778e-13
This factor comes from each unit's defined relationship to the category's base unit: 1 cubic meter per hours equals 0.000277777777778 base units, and 1 cubic kilometer per seconds equals 1000000000 base units, so dividing one by the other gives the direct cubic meter per hours-to-cubic kilometer per seconds factor of 2.777778e-13.
Simple example
1 m3/h × 2.777778e-13 = 2.777778e-13 km3/s
1 cubic meter per hours = 2.777778e-13 cubic kilometer per seconds.
Real-world example
60 m3/h × 2.777778e-13 = 1.666667e-11 km3/s
60 cubic meter per hours = 1.666667e-11 cubic kilometer per seconds.
Conversion table
| Cubic Meter per Hours (m3/h) | Cubic Kilometer per Seconds (km3/s) |
|---|---|
| 0.1 m3/h | 2.777778e-14 km3/s |
| 1 m3/h | 2.777778e-13 km3/s |
| 10 m3/h | 2.777778e-12 km3/s |
| 60 m3/h | 1.666667e-11 km3/s |
| 100 m3/h | 2.777778e-11 km3/s |
| 1,000 m3/h | 2.777778e-10 km3/s |
Reverse conversion: Cubic Kilometer per Seconds to Cubic Meter per Hours
2.777778e-13 km3/s × 3.6e+12 = 1.00000008 m3/h
2.777778e-13 cubic kilometer per seconds = 1.00000008 cubic meter per hours.
cubic meter per hours = cubic kilometer per seconds × 3.6e+12
For a page dedicated to this direction, see Cubic Kilometer per Seconds to Cubic Meter per Hours.
Understanding the Cubic Meter per Hours
Cubic Meter per Hours (m3/h) measures volumetric flow rate. One cubic meter of volume passing a point every hour — a common scale for equipment and system flow ratings. It is classified as a metric derived flow-rate unit.
Where it's used: Standard flow-rate unit for HVAC and industrial equipment ratings internationally, outside the US
Uses of the Cubic Meter per Hours today
- HVAC equipment airflow and liquid-flow ratings
- Industrial pump and system flow specifications
- Building ventilation system design
Understanding the Cubic Kilometer per Seconds (km3/s)
Volumetric flow rate.
Cubic Meter per Hours — sources
- ISO 5167 (flow measurement standards) — Cubic meters per hour as a standard industrial flow-rate unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic kilometer per seconds are in 1 cubic meter per hours?
1 cubic meter per hours equals 2.777778e-13 cubic kilometer per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert cubic meter per hours to cubic kilometer per seconds?
Multiply the cubic meter per hours value by 2.777778e-13. The converter above does this instantly to whatever precision you set.
How do I convert cubic kilometer per seconds back to cubic meter per hours?
Use the reverse factor: 1 cubic kilometer per seconds equals 3.6e+12 cubic meter per hours. You can also use the swap control in the converter above to flip the direction instantly.
What is a cubic meter per hours?
Cubic Meter per Hours (m3/h) measures volumetric flow rate. One cubic meter of volume passing a point every hour — a common scale for equipment and system flow ratings. It is classified as a metric derived flow-rate unit.
What is a cubic kilometer per seconds?
Cubic Kilometer per Seconds (km3/s) is a unit of flow rate.
Is the cubic meter per hours to cubic kilometer per seconds conversion exact?
Yes. Both cubic meter per hours and cubic kilometer per seconds are defined by fixed standards rather than physical artifacts, so the factor of 2.777778e-13 used above is exact to as many digits as you choose to display.
Where is the cubic meter per hours still used today?
Standard flow-rate unit for HVAC and industrial equipment ratings internationally, outside the US
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.