Volumetric flow rate.
Cubic foot per Seconds to Cubic foot per Days Converter — ft3/s to ft3/d
Convert Cubic foot per Seconds (ft3/s) to Cubic foot per Days (ft3/d) using the exact conversion factor (1 cubic foot per seconds = 86,400 cubic foot per days). See the formula, worked examples, conversion table, and common uses.
Cubic foot per Seconds to Cubic foot per Days 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 / 3.2774128e-7.
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 Cubic foot per Days
Cubic foot per Seconds and Cubic foot per Days 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
cubic foot per days = cubic foot per seconds × 86400
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 cubic foot per days equals 3.277413e-7 base units, so dividing one by the other gives the direct cubic foot per seconds-to-cubic foot per days factor of 86400.
Simple example
1 ft3/s × 86400 = 86,400 ft3/d
1 cubic foot per seconds = 86,400 cubic foot per days.
Real-world example
60 ft3/s × 86400 = 5,184,000 ft3/d
60 cubic foot per seconds = 5,184,000 cubic foot per days.
Conversion table
| Cubic foot per Seconds (ft3/s) | Cubic foot per Days (ft3/d) |
|---|---|
| 0.1 ft3/s | 8,640 ft3/d |
| 1 ft3/s | 86,400 ft3/d |
| 10 ft3/s | 864,000 ft3/d |
| 60 ft3/s | 5,184,000 ft3/d |
| 100 ft3/s | 8,640,000 ft3/d |
| 1,000 ft3/s | 86,400,000 ft3/d |
Reverse conversion: Cubic foot per Days to Cubic foot per Seconds
1 ft3/d × 0.00001157407407 = 0.0000115741 ft3/s
1 cubic foot per days = 0.0000115741 cubic foot per seconds.
cubic foot per seconds = cubic foot per days × 0.0000115740740741
For a page dedicated to this direction, see Cubic foot per Days 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 Cubic foot per Days (ft3/d)
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 cubic foot per days are in 1 cubic foot per seconds?
1 cubic foot per seconds equals 86,400 cubic foot per days, using the exact defined conversion factor rather than an estimate.
How do I convert cubic foot per seconds to cubic foot per days?
Multiply the cubic foot per seconds value by 86400. The converter above does this instantly to whatever precision you set.
How do I convert cubic foot per days back to cubic foot per seconds?
Use the reverse factor: 1 cubic foot per days equals 0.0000115741 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 cubic foot per days?
Cubic foot per Days (ft3/d) is a unit of flow rate.
Is the cubic foot per seconds to cubic foot per days conversion exact?
Yes. Both cubic foot per seconds and cubic foot per days are defined by fixed standards rather than physical artifacts, so the factor of 86400 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.