Gallon (US) per Minute to Cubic Foot per Second (GPM to CFS)
Convert GPM to CFS — Flow Rate converter
One gallon (US) per minute equals 0.0022280093 CFS, so to convert gallons (US) per minute to cubic feet per second you multiply the value by 0.0022280093. A gallon (US) per minute is smaller than a cubic foot per second — going the other way, 1 CFS = 448.831169 GPM. For example, 10 GPM = 0.02228009 CFS and 50 GPM = 0.11140046 CFS.
1 GPM = 0.0022280093 CFS
Gallon (US) per Minute to Cubic Foot per Second formula
1 Gallon (US) per Minute = 0.0022280093 CFS
Worked examples
- 25 GPM = 0.05570023 CFS
- 100 GPM = 0.22280093 CFS
Gallon (US) per Minute to Cubic Foot per Second conversion table
| Gallon (US) per Minute (GPM) | Cubic Foot per Second (CFS) |
|---|---|
| 1 | 0.0022280093 |
| 2 | 0.0044560185 |
| 3 | 0.0066840278 |
| 5 | 0.01114005 |
| 8 | 0.01782407 |
| 10 | 0.02228009 |
| 12 | 0.02673611 |
| 15 | 0.03342014 |
| 20 | 0.04456019 |
| 25 | 0.05570023 |
| 50 | 0.11140046 |
| 100 | 0.22280093 |
| 250 | 0.55700231 |
| 500 | 1.114005 |
| 1000 | 2.228009 |
Which gallon, and which trade
The single most expensive mistake in flow conversion is the gallon. A US liquid gallon is 3.785411784 litres; an imperial gallon is 4.54609 litres. US GPM and imperial GPM differ by about 20%, and pump datasheets frequently do not say which one they mean. Check the manufacturer's country of origin before trusting a GPM figure.
Different trades default to different units for the same physical quantity: HVAC and compressed air work in CFM, plumbing and pumps in GPM or LPM, and process and water engineering in m³/h or L/s. A specification that mixes them is usually quoting different equipment, not different flows. On this page, 1 GPM = 0.0022280093 CFS.
Frequently asked questions
How many cubic feet per second are in one gallon (US) per minute?
One gallon (US) per minute equals 0.0022280093 cubic feet per second (CFS).
How many gallons (US) per minute are in one cubic foot per second?
One cubic foot per second equals 448.831169 gallons (US) per minute (GPM).
How do you convert gallons (US) per minute to cubic feet per second?
1 Gallon (US) per Minute = 0.0022280093 CFS. Use the calculator above for any value.
What is 5 GPM in CFS?
5 GPM = 0.01114005 CFS.
What is 100 GPM in CFS?
100 GPM = 0.22280093 CFS.
What is 10 GPM in CFS?
10 GPM = 0.02228009 CFS.
What is 20 GPM in CFS?
20 GPM = 0.04456019 CFS.
What is 50 GPM in CFS?
50 GPM = 0.11140046 CFS.
What is 500 GPM in CFS?
500 GPM = 1.114005 CFS.
Is a gallon (US) per minute bigger than a cubic foot per second?
No. A gallon (US) per minute is smaller — one gallon (US) per minute equals 0.0022280093 cubic feet per second, while one cubic foot per second equals 448.831169 gallons (US) per minute.