Volumetric flow rate.
Cubic Meter per Seconds to Gallons per Fortnight Converter — m3/s to gal/fn
Convert Cubic Meter per Seconds (m3/s) to Gallon per Fortnight (gal/fn) using the exact conversion factor (1 cubic meter per seconds = 319,542,514.5 gallon per fortnight). See the formula, worked examples, conversion table, and common uses.
Cubic Meter per Seconds to Gallons per Fortnight 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 / 3.12947403e-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 Seconds to Gallons per Fortnight
Cubic Meter per Seconds and Gallon per Fortnight 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 Seconds is most often used for used by hydrologists and water-resource engineers internationally to report river and reservoir discharge at large scales.
Formula
gallons per fortnight = cubic meter per seconds × 319542514.532
This factor comes from each unit's defined relationship to the category's base unit: 1 cubic meter per seconds equals 1 base unit, and 1 gallon per fortnight equals 3.129474e-9 base units, so dividing one by the other gives the direct cubic meter per seconds-to-gallon per fortnight factor of 319542514.532.
Simple example
1 m3/s × 319542514.5 = 319,542,514.5 gal/fn
1 cubic meter per seconds = 319,542,514.5 gallons per fortnight.
Real-world example
60 m3/s × 319542514.5 = 19,172,550,870 gal/fn
60 cubic meter per seconds = 19,172,550,870 gallons per fortnight.
Conversion table
| Cubic Meter per Seconds (m3/s) | Gallon per Fortnight (gal/fn) |
|---|---|
| 0.1 m3/s | 31,954,251.45 gal/fn |
| 1 m3/s | 319,542,514.5 gal/fn |
| 10 m3/s | 3,195,425,145 gal/fn |
| 60 m3/s | 19,172,550,870 gal/fn |
| 100 m3/s | 31,954,251,450 gal/fn |
| 1,000 m3/s | 319,542,514,500 gal/fn |
Reverse conversion: Gallon per Fortnight to Cubic Meter per Seconds
1 gal/fn × 3.129474e-9 = 3.129474e-9 m3/s
1 gallon per fortnight = 3.129474e-9 cubic meter per seconds.
cubic meter per seconds = gallons per fortnight × 3.129474e-9
For a page dedicated to this direction, see Gallon per Fortnight to Cubic Meter per Seconds.
Understanding the Cubic Meter per Seconds
Cubic Meter per Seconds (m3/s) measures volumetric flow rate. The SI coherent unit for volumetric flow rate — one cubic meter of volume passing a point every second. It is classified as a SI coherent derived unit.
Where it's used: Used internationally in hydrology and large-scale water-resource engineering
Uses of the Cubic Meter per Seconds today
- Used by hydrologists and water-resource engineers internationally to report river and reservoir discharge at large scales
Understanding the Gallon per Fortnight (gal/fn)
Volumetric flow rate.
Cubic Meter per Seconds — sources
- BIPM SI Brochure — Cubic meter per second as the SI coherent derived unit for volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gallons per fortnight are in 1 cubic meter per seconds?
1 cubic meter per seconds equals 319,542,514.5 gallons per fortnight, using the exact defined conversion factor rather than an estimate.
How do I convert cubic meter per seconds to gallon per fortnight?
Multiply the cubic meter per seconds value by 319542514.5. The converter above does this instantly to whatever precision you set.
How do I convert gallon per fortnight back to cubic meter per seconds?
Use the reverse factor: 1 gallon per fortnight equals 3.129474e-9 cubic meter per seconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a cubic meter per seconds?
Cubic Meter per Seconds (m3/s) measures volumetric flow rate. The SI coherent unit for volumetric flow rate — one cubic meter of volume passing a point every second. It is classified as a SI coherent derived unit.
What is a gallon per fortnight?
Gallon per Fortnight (gal/fn) is a unit of flow rate.
Is the cubic meter per seconds to gallon per fortnight conversion exact?
Yes. Both cubic meter per seconds and gallon per fortnight are defined by fixed standards rather than physical artifacts, so the factor of 319542514.5 used above is exact to as many digits as you choose to display.
Where is the cubic meter per seconds still used today?
Used internationally in hydrology and large-scale water-resource engineering
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.