Volumetric flow rate.
Cubic foot per Minutes to Cubic inch per Seconds Converter — ft3/min to in3/s
Convert Cubic foot per Minutes (ft3/min) to Cubic inch per Seconds (in3/s) using the exact conversion factor (1 cubic foot per minutes = 28.8 cubic inch per seconds). See the formula, worked examples, conversion table, and common uses.
Cubic foot per Minutes to Cubic inch 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 0.0004719474432 / 1.6387064e-5.
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 Minutes to Cubic inch per Seconds
Cubic foot per Minutes and Cubic inch 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. Cubic foot per Minutes is most often used for the standard unit for rating hvac airflow, compressed-air equipment output, and fan/blower performance.
Formula
cubic inch per seconds = cubic foot per minutes × 28.8
This factor comes from each unit's defined relationship to the category's base unit: 1 cubic foot per minutes equals 0.0004719474432 base units, and 1 cubic inch per seconds equals 0.000016387064 base units, so dividing one by the other gives the direct cubic foot per minutes-to-cubic inch per seconds factor of 28.8.
Simple example
1 ft3/min × 28.8 = 28.8 in3/s
1 cubic foot per minutes = 28.8 cubic inch per seconds.
Real-world example
60 ft3/min × 28.8 = 1,728 in3/s
60 cubic foot per minutes = 1,728 cubic inch per seconds.
Conversion table
| Cubic foot per Minutes (ft3/min) | Cubic inch per Seconds (in3/s) |
|---|---|
| 0.1 ft3/min | 2.88 in3/s |
| 1 ft3/min | 28.8 in3/s |
| 10 ft3/min | 288 in3/s |
| 60 ft3/min | 1,728 in3/s |
| 100 ft3/min | 2,880 in3/s |
| 1,000 ft3/min | 28,800 in3/s |
Reverse conversion: Cubic inch per Seconds to Cubic foot per Minutes
28.8 in3/s × 0.03472222222 = 1 ft3/min
28.8 cubic inch per seconds = 1 cubic foot per minutes.
cubic foot per minutes = cubic inch per seconds × 0.0347222222222
For a page dedicated to this direction, see Cubic inch per Seconds to Cubic foot per Minutes.
Understanding the Cubic foot per Minutes
Cubic foot per Minutes (ft3/min) measures volumetric flow rate. One cubic foot of volume passing a point every minute. It is classified as a US customary flow-rate unit.
Where it's used: United States, and widely recognized internationally in HVAC and compressed-air equipment specifications
Uses of the Cubic foot per Minutes today
- The standard unit for rating HVAC airflow, compressed-air equipment output, and fan/blower performance
Understanding the Cubic inch per Seconds (in3/s)
Volumetric flow rate.
Cubic foot per Minutes — sources
- AMCA / ASHRAE HVAC industry standards — CFM is the conventional unit for airflow ratings in HVAC and industrial air-moving equipment.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic inch per seconds are in 1 cubic foot per minutes?
1 cubic foot per minutes equals 28.8 cubic inch per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert cubic foot per minutes to cubic inch per seconds?
Multiply the cubic foot per minutes value by 28.8. The converter above does this instantly to whatever precision you set.
How do I convert cubic inch per seconds back to cubic foot per minutes?
Use the reverse factor: 1 cubic inch per seconds equals 0.0347222222 cubic foot per minutes. You can also use the swap control in the converter above to flip the direction instantly.
What is a cubic foot per minutes?
Cubic foot per Minutes (ft3/min) measures volumetric flow rate. One cubic foot of volume passing a point every minute. It is classified as a US customary flow-rate unit.
What is a cubic inch per seconds?
Cubic inch per Seconds (in3/s) is a unit of flow rate.
Is the cubic foot per minutes to cubic inch per seconds conversion exact?
Yes. Both cubic foot per minutes and cubic inch per seconds are defined by fixed standards rather than physical artifacts, so the factor of 28.8 used above is exact to as many digits as you choose to display.
Where is the cubic foot per minutes still used today?
United States, and widely recognized internationally in HVAC and compressed-air equipment specifications
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.