Flow Rate Converter
Convert pump, fan, fluid, and airflow specs quickly.
Choose units
Enter a value, pick the units, and the conversion updates instantly.
Quick converter. Results update locally in your browser.
Conversion notes
Companion units, sanity checks, and precision notes.
What this means
10 GPM (US) converts to 37.85 L/min. The reverse check is 10 GPM (US), which is useful for spotting unit-entry mistakes.
Copy result
Copy a short conversion note without saving the input anywhere.
| Unit | Converted value | Based on |
|---|---|---|
| L/min | 37.85 L/min | 10 GPM (US) |
| L/s | 0.63 L/s | 10 GPM (US) |
| m³/h | 2.27 m³/h | 10 GPM (US) |
| GPM (US) | 10 GPM (US) | 10 GPM (US) |
| CFM | 1.34 CFM | 10 GPM (US) |
- Converted value
- 37.85 L/min
- Based on
- 10 GPM (US)
- Converted value
- 0.63 L/s
- Based on
- 10 GPM (US)
- Converted value
- 2.27 m³/h
- Based on
- 10 GPM (US)
- Converted value
- 10 GPM (US)
- Based on
- 10 GPM (US)
- Converted value
- 1.34 CFM
- Based on
- 10 GPM (US)
Flow-rate capacity worksheet
Compare the entered flow against derated and headroom scenarios before using the conversion in a pump, fan, irrigation, filtration, or process worksheet.
| Scenario | L/min | US GPM | CFM | m³/h | 10-minute volume | Use it for |
|---|---|---|---|---|---|---|
| Entered flow | 37.85 | 10 | 1.34 | 2.27 | 378.54 L | Use this as the source flow rate before adding margin, derating, or duty-cycle assumptions. |
| 80% of entered flow | 30.28 | 8 | 1.07 | 1.82 | 302.83 L | Quick derating check for clogged filters, partially open valves, dirty coils, or conservative fan/pump operation. |
| Add 20% capacity | 45.42 | 12 | 1.6 | 2.73 | 454.25 L | Common early sizing headroom when friction loss, fittings, seasonal demand, or spec uncertainty may reduce delivered flow. |
| Add 50% capacity | 56.78 | 15 | 2.01 | 3.41 | 567.81 L | High-margin planning line for future expansion, high-loss layouts, or intentionally oversized test capacity. |
- L/min
- 37.85
- US GPM
- 10
- CFM
- 1.34
- m³/h
- 2.27
- 10-minute volume
- 378.54 L
- Use it for
- Use this as the source flow rate before adding margin, derating, or duty-cycle assumptions.
- L/min
- 30.28
- US GPM
- 8
- CFM
- 1.07
- m³/h
- 1.82
- 10-minute volume
- 302.83 L
- Use it for
- Quick derating check for clogged filters, partially open valves, dirty coils, or conservative fan/pump operation.
- L/min
- 45.42
- US GPM
- 12
- CFM
- 1.6
- m³/h
- 2.73
- 10-minute volume
- 454.25 L
- Use it for
- Common early sizing headroom when friction loss, fittings, seasonal demand, or spec uncertainty may reduce delivered flow.
- L/min
- 56.78
- US GPM
- 15
- CFM
- 2.01
- m³/h
- 3.41
- 10-minute volume
- 567.81 L
- Use it for
- High-margin planning line for future expansion, high-loss layouts, or intentionally oversized test capacity.
Flow-spec checklist
| Check | Why |
|---|---|
| Separate liquid flow from airflow | GPM/L/min are usually liquid flow checks; CFM airflow can change with temperature, pressure, humidity, and duct conditions. |
| Account for system losses | Pipe friction, fittings, elevation/head, filters, coils, dampers, and valves can reduce delivered flow below the free-flow rating. |
| Match the duty point | Use the pump or fan curve at the actual head/static pressure instead of sizing from a unit conversion alone. |
- Why
- GPM/L/min are usually liquid flow checks; CFM airflow can change with temperature, pressure, humidity, and duct conditions.
- Why
- Pipe friction, fittings, elevation/head, filters, coils, dampers, and valves can reduce delivered flow below the free-flow rating.
- Why
- Use the pump or fan curve at the actual head/static pressure instead of sizing from a unit conversion alone.
Watch-outs
- Rounded display can hide tiny precision differences; use exact specs where tolerances matter.
- Make sure the source and destination units are from the same measurement family.
- Do not use a quick conversion as final design approval for safety-critical systems.
- Confirm standards, tolerances, temperature, material condition, and manufacturer data where specs matter.
Rounded for display. Use exact specs or professional references where precision matters.
Example
10 US GPM = about 37.85 L/min.
Notes
Results are rounded for quick checks. Use official specs or calibrated tools when tolerances, compliance, or safety matter.
Get a better answer from the Flow Rate Converter
- Start with the example values to see how the tool behaves.
- Swap in your own numbers, even if they are rough first-pass estimates.
- Change one input at a time so you can see what actually moves the result.
What the result means
The result is a quick technical check based on a standard formula or unit relationship. It helps you sanity-check a spec before deeper review.
How to use it
Use it to catch order-of-magnitude problems: a value that is wildly too high, too low, or in the wrong unit before it reaches a drawing, quote, or part list.
What can change it
Do not treat a simple calculator as engineering approval. Real equipment decisions can depend on tolerance, safety factor, code, heat, duty cycle, and manufacturer limits.
Good for
Convert pump, fan, and fluid flow specs.
Check next
Compare your result with Pressure Converter, Density Converter, Liquid Volume Converter when you want more context.
Best habit
Run a conservative case and an optimistic case. The gap between them is often more useful than a single answer.
Common uses
- Convert pump, fan, and fluid flow specs.
- Switch between GPM and L/min.
- Compare CFM and metric flow units.
Common questions
Is the Flow Rate Converter private?
Yes. CalcShelf calculators run without an account, do not save calculator entries, and do not put raw inputs into shareable URLs or analytics events.
How accurate is the Flow Rate Converter?
It is a formula check, not stamped engineering. Tolerance, safety factor, heat, duty cycle, environment, and manufacturer limits can change real equipment choices.
What should I check after using the Flow Rate Converter?
Verify units, specs, tolerances, safety factors, code requirements, and manufacturer data before choosing parts or equipment.
Which calculator should I try next?
Use the related calculators below to cross-check the same decision from another angle before you act.
Method behind the estimate
Engineering tools use standard unit relationships and simple mechanical, electrical, pressure, energy, density, or flow conversions.
Why the detail matters
For design, safety, warranty, or production work, verify against official specifications, standards, tolerances, and qualified engineering review.
Privacy guardrail
Your calculator values are for you. CalcShelf does not require an account, save calculator entries, put your numbers into shareable URLs, or use raw inputs as analytics events.
Copy or print safely
Use any copy, print, or worksheet controls as local handoff tools for your own notes, supplier calls, lender questions, or implementation checklist. They are there to help you explain the result to a human.
Before acting
Treat the result as a decision draft, not a verdict. Recheck the source numbers, run a downside case, and verify the real-world rule, quote, label, or spec that controls the final answer.
Last reviewed: May 11, 2026. See methodology and editorial policy for formulas, assumptions, rounding, review approach, and limitations. For production, code, safety, or equipment changes, verify against official specs.