Imperial gallons per minute to US gallons per minute
Type a value in imperial gallons per minute to see it in US gallons per minute straight away, or type in the second box to convert back.
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How to use it
- Type the value in the imperial gallons per minute box.
- Read the result in US gallons per minute as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
gpm (US) = gpm (imp) × 1.200949926
Multiply the value in imperial gallons per minute by 1.200949926 to get US gallons per minute.
Example
To convert 25 gpm (imp) to US gallons per minute: 25 × 1.200949926 = 30.0237 gpm (US).
Conversion table
| Imperial gallons per minute (gpm (imp)) | US gallons per minute (gpm (US)) |
|---|---|
| 1 | 1.20095 |
| 2 | 2.4019 |
| 3 | 3.60285 |
| 5 | 6.00475 |
| 10 | 12.0095 |
| 20 | 24.019 |
| 25 | 30.0237 |
| 50 | 60.0475 |
| 100 | 120.095 |
| 250 | 300.237 |
| 500 | 600.475 |
| 1,000 | 1,200.95 |
About the units
- Imperial gallon per minute
- One imperial gallon (4.54609 L) passing each minute, found on older British equipment.
- US gallon per minute
- One US gallon (3.785411784 L) passing each minute, a common unit on US pump specifications.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many US gallons per minute are in one imperial gallon per minute?
1 gpm (imp) = 1.20095 gpm (US) exactly.
How do I convert imperial gallons per minute to US gallons per minute?
Use gpm (US) = gpm (imp) × 1.200949926. For example, 25 gpm (imp) = 30.0237 gpm (US).
How many imperial gallons per minute are in one US gallon per minute?
1 gpm (US) = 0.832674 gpm (imp).
How do I convert liters per minute to US gallons per minute?
One US gallon per minute is exactly 3.785411784 L/min, so divide the liters figure by 3.785411784. For example, 20 L/min is about 5.28 US gpm.
What does CFM mean on AC units and fans?
CFM stands for cubic feet per minute and describes how much air a unit moves. One CFM equals 1.69901079552 cubic meters per hour or 0.4719474432 liters per second.