Volumetric flow rate.
Cubic foot per Seconds to Cups per Fortnight Converter — ft3/s to cup/fn
Convert Cubic foot per Seconds (ft3/s) to Cup per Fortnight (cup/fn) using the exact conversion factor (1 cubic foot per seconds = 144,774,981.8 cup per fortnight). See the formula, worked examples, conversion table, and common uses.
Cubic foot per Seconds to Cups 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 0.02831684659 / 1.95592127e-10.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Cubic foot per Seconds to Cups per Fortnight
Cubic foot per Seconds and Cup 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 foot per Seconds is most often used for the standard unit used by the us geological survey for reporting river and stream discharge at gauging stations.
Formula
cups per fortnight = cubic foot per seconds × 144774981.818
This factor comes from each unit's defined relationship to the category's base unit: 1 cubic foot per seconds equals 0.028316846592 base units, and 1 cup per fortnight equals 1.955921e-10 base units, so dividing one by the other gives the direct cubic foot per seconds-to-cup per fortnight factor of 144774981.818.
Simple example
1 ft3/s × 144774981.8 = 144,774,981.8 cup/fn
1 cubic foot per seconds = 144,774,981.8 cups per fortnight.
Real-world example
60 ft3/s × 144774981.8 = 8,686,498,909 cup/fn
60 cubic foot per seconds = 8,686,498,909 cups per fortnight.
Conversion table
| Cubic foot per Seconds (ft3/s) | Cup per Fortnight (cup/fn) |
|---|---|
| 0.1 ft3/s | 14,477,498.18 cup/fn |
| 1 ft3/s | 144,774,981.8 cup/fn |
| 10 ft3/s | 1,447,749,818 cup/fn |
| 60 ft3/s | 8,686,498,909 cup/fn |
| 100 ft3/s | 14,477,498,180 cup/fn |
| 1,000 ft3/s | 144,774,981,800 cup/fn |
Reverse conversion: Cup per Fortnight to Cubic foot per Seconds
1 cup/fn × 6.907271e-9 = 6.907271e-9 ft3/s
1 cup per fortnight = 6.907271e-9 cubic foot per seconds.
cubic foot per seconds = cups per fortnight × 6.907271e-9
For a page dedicated to this direction, see Cup per Fortnight to Cubic foot per Seconds.
Understanding the Cubic foot per Seconds
Cubic foot per Seconds (ft3/s) measures volumetric flow rate. One cubic foot of volume passing a point every second. It is classified as a US customary flow-rate unit.
Where it's used: United States
Uses of the Cubic foot per Seconds today
- The standard unit used by the US Geological Survey for reporting river and stream discharge at gauging stations
Understanding the Cup per Fortnight (cup/fn)
Volumetric flow rate.
Cubic foot per Seconds — sources
- USGS Water Science School — Cubic feet per second (cfs) is the standard unit USGS uses to report streamflow.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cups per fortnight are in 1 cubic foot per seconds?
1 cubic foot per seconds equals 144,774,981.8 cups per fortnight, using the exact defined conversion factor rather than an estimate.
How do I convert cubic foot per seconds to cup per fortnight?
Multiply the cubic foot per seconds value by 144774981.8. The converter above does this instantly to whatever precision you set.
How do I convert cup per fortnight back to cubic foot per seconds?
Use the reverse factor: 1 cup per fortnight equals 6.907271e-9 cubic foot per seconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a cubic foot per seconds?
Cubic foot per Seconds (ft3/s) measures volumetric flow rate. One cubic foot of volume passing a point every second. It is classified as a US customary flow-rate unit.
What is a cup per fortnight?
Cup per Fortnight (cup/fn) is a unit of flow rate.
Is the cubic foot per seconds to cup per fortnight conversion exact?
Yes. Both cubic foot per seconds and cup per fortnight are defined by fixed standards rather than physical artifacts, so the factor of 144774981.8 used above is exact to as many digits as you choose to display.
Where is the cubic foot per seconds still used today?
United States
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.