Volumetric flow rate.
Gallons per Fortnight to Cubic Meter per Seconds Converter — gal/fn to m3/s
Convert Gallon per Fortnight (gal/fn) to Cubic Meter per Seconds (m3/s) using the exact conversion factor (1 gallon per fortnight = 3.129474e-9 cubic meter per seconds). See the formula, worked examples, conversion table, and common uses.
Gallons per Fortnight to Cubic Meter 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 3.12947403e-9 / 1.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Gallons per Fortnight to Cubic Meter per Seconds
Gallon per Fortnight and Cubic Meter 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. Both are volumetric flow rate units.
Formula
cubic meter per seconds = gallons per fortnight × 3.129474e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 gallon per fortnight equals 3.129474e-9 base units, and 1 cubic meter per seconds equals 1 base unit, so dividing one by the other gives the direct gallon per fortnight-to-cubic meter per seconds factor of 3.129474e-9.
Simple example
1 gal/fn × 3.129474e-9 = 3.129474e-9 m3/s
1 gallon per fortnight = 3.129474e-9 cubic meter per seconds.
Real-world example
60 gal/fn × 3.129474e-9 = 1.877684e-7 m3/s
60 gallons per fortnight = 1.877684e-7 cubic meter per seconds.
Conversion table
| Gallon per Fortnight (gal/fn) | Cubic Meter per Seconds (m3/s) |
|---|---|
| 0.1 gal/fn | 3.129474e-10 m3/s |
| 1 gal/fn | 3.129474e-9 m3/s |
| 10 gal/fn | 3.129474e-8 m3/s |
| 60 gal/fn | 1.877684e-7 m3/s |
| 100 gal/fn | 3.129474e-7 m3/s |
| 1,000 gal/fn | 0.0000031295 m3/s |
Reverse conversion: Cubic Meter per Seconds to Gallon per Fortnight
3.129474e-9 m3/s × 319542514.5 = 0.9999999911 gal/fn
3.129474e-9 cubic meter per seconds = 0.9999999911 gallons per fortnight.
gallons per fortnight = cubic meter per seconds × 319542514.532
For a page dedicated to this direction, see Cubic Meter per Seconds to Gallon per Fortnight.
Understanding the Gallon per Fortnight (gal/fn)
Volumetric flow rate.
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
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 cubic meter per seconds are in 1 gallon per fortnight?
1 gallon per fortnight equals 3.129474e-9 cubic meter per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert gallon per fortnight to cubic meter per seconds?
Multiply the gallon per fortnight value by 3.129474e-9. The converter above does this instantly to whatever precision you set.
How do I convert cubic meter per seconds back to gallon per fortnight?
Use the reverse factor: 1 cubic meter per seconds equals 319,542,514.5 gallons per fortnight. You can also use the swap control in the converter above to flip the direction instantly.
What is a gallon per fortnight?
Gallon per Fortnight (gal/fn) is a unit of flow rate.
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.
Is the gallon per fortnight to cubic meter per seconds conversion exact?
Yes. Both gallon per fortnight and cubic meter per seconds are defined by fixed standards rather than physical artifacts, so the factor of 3.129474e-9 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.