Volumetric flow rate.
Cubic foot per Seconds to Cup per Years Converter — ft3/s to cup/yr
Convert Cubic foot per Seconds (ft3/s) to Cup per Years (cup/yr) using the exact conversion factor (1 cubic foot per seconds = 3,776,998,307 cup per years). See the formula, worked examples, conversion table, and common uses.
Cubic foot per Seconds to Cup per Years 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 / 7.49718276e-12.
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 Cup per Years
Cubic foot per Seconds and Cup per Years 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
cup per years = cubic foot per seconds × 3776998306.91
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 years equals 7.497183e-12 base units, so dividing one by the other gives the direct cubic foot per seconds-to-cup per years factor of 3776998306.91.
Simple example
1 ft3/s × 3776998307 = 3,776,998,307 cup/yr
1 cubic foot per seconds = 3,776,998,307 cup per years.
Real-world example
60 ft3/s × 3776998307 = 226,619,898,400 cup/yr
60 cubic foot per seconds = 226,619,898,400 cup per years.
Conversion table
| Cubic foot per Seconds (ft3/s) | Cup per Years (cup/yr) |
|---|---|
| 0.1 ft3/s | 377,699,830.7 cup/yr |
| 1 ft3/s | 3,776,998,307 cup/yr |
| 10 ft3/s | 37,769,983,070 cup/yr |
| 60 ft3/s | 226,619,898,400 cup/yr |
| 100 ft3/s | 377,699,830,700 cup/yr |
| 1,000 ft3/s | 3.776998e+12 cup/yr |
Reverse conversion: Cup per Years to Cubic foot per Seconds
1 cup/yr × 2.647605e-10 = 2.647605e-10 ft3/s
1 cup per years = 2.647605e-10 cubic foot per seconds.
cubic foot per seconds = cup per years × 2.647605e-10
For a page dedicated to this direction, see Cup per Years 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 Years (cup/yr)
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 cup per years are in 1 cubic foot per seconds?
1 cubic foot per seconds equals 3,776,998,307 cup per years, using the exact defined conversion factor rather than an estimate.
How do I convert cubic foot per seconds to cup per years?
Multiply the cubic foot per seconds value by 3776998307. The converter above does this instantly to whatever precision you set.
How do I convert cup per years back to cubic foot per seconds?
Use the reverse factor: 1 cup per years equals 2.647605e-10 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 years?
Cup per Years (cup/yr) is a unit of flow rate.
Is the cubic foot per seconds to cup per years conversion exact?
Yes. Both cubic foot per seconds and cup per years are defined by fixed standards rather than physical artifacts, so the factor of 3776998307 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.