Convert Gallons per minute to Cubic meters per second
Instantly convert Gallons per minute (GPM) to Cubic meters per second (m³/s) with our free online calculator.
Formula: GPM to m³/s — multiply by 6.3090e-5
Reference Table
| Gallons per minute (GPM) | Cubic meters per second (m³/s) |
|---|---|
| 1 | 0.0000630902 |
| 5 | 0.000315451 |
| 10 | 0.000630902 |
| 25 | 0.00157725 |
| 50 | 0.00315451 |
| 100 | 0.00630902 |
How to Convert Gallons per minute to Cubic meters per second
Formula
To convert Gallons per minute (GPM) to Cubic meters per second (m³/s): multiply by 6.3090e-5
Step-by-Step
- Start with your value in Gallons per minute (GPM).
- Multiply by 6.3090e-5 to perform the conversion.
- The result is your value expressed in Cubic meters per second (m³/s).
Conversion Factor
1 GPM = 0.0000630902 m³/s
Reverse Factor
1 m³/s = 15850.3 GPM
Worked Example
Convert 25 Gallons per minute to Cubic meters per second: 25 GPM = 0.00157725 m³/s
About Gallon per minute (GPM)
A US customary flow-rate unit (US gallons per minute, where 1 US gallon = 3.785411784 liters per NIST SP 811) used universally in US plumbing, HVAC, fire protection, agricultural irrigation, and swimming-pool circulation. GPM is the primary US sizing unit for residential water softeners (the IAPMO Z601 test method rates ion-exchange capacity at a defined GPM), well-pump submersibles, lawn sprinkler design (the GPM at each emitter sets zone sizing), NFPA 13 fire-sprinkler systems (head-flow allocations in GPM), and pool circulation (turnover rates require X GPM × hours). Reference values: a US WaterSense-certified showerhead is ≤ 2.0 GPM, an older US showerhead is 2.5-3 GPM, a residential dishwasher is ~3-4 GPM peak, a 4-inch municipal fire hydrant delivers 500-1,500 GPM (NFPA test pressure 20 psi residual). 1 GPM = 3.7854 L/min = 0.06309 L/s. Care: US GPM ≠ Imperial GPM (a UK gallon is 4.54609 L, so 1 Imperial GPM = 1.201 US GPM).
About Cubic meter per second (m³/s)
The SI unit of volumetric flow rate (ISO 80000-4 §4-30) — the volume of fluid passing a fixed cross-section per unit time. m³/s is the universal unit in fluid-dynamics research (Reynolds and Navier-Stokes work), large-pipeline engineering (offshore oil-export risers, district-energy distribution mains), river and flood hydrology (where it is conventionally called the "cumec" — for "cubic meter per second" — in technical writing), large-scale wastewater treatment, and industrial process flow simulation (Aspen HYSYS, CHEMCAD, OLGA). Reference scale: the Amazon River average discharge is ~209,000 m³/s, the Mississippi ~16,800 m³/s, a major dam spillway flood release ~5,000-15,000 m³/s. Most practical applications use smaller units (L/s, m³/hr, GPM) because m³/s values are typically very small for human-scale equipment — a household faucet is ~0.0002 m³/s. Converting to gallons per minute (US): multiply by 15,850. Converting to L/s: multiply by 1,000.
Quick Facts
- 1 Gallon per minute equals 0.0000630902 Cubic meters per second
- 1 Cubic meter per second equals 15850.3 Gallons per minute
- Gallon per minute is a unit of volumetric flow rate
- Cubic meter per second is a unit of volumetric flow rate
- This conversion is commonly used in plumbing, HVAC systems, and chemical process engineering
- The Gallon per minute belongs to the imperial system
- The Cubic meter per second belongs to the metric system
Common Gallon per minute to Cubic meter per second Conversions
| Gallons per minute (GPM) | Cubic meters per second (m³/s) |
|---|---|
| 0.01 | 6.309020e-7 |
| 0.1 | 0.00000630902 |
| 0.25 | 0.0000157725 |
| 0.5 | 0.0000315451 |
| 1 | 0.0000630902 |
| 2 | 0.00012618 |
| 3 | 0.000189271 |
| 5 | 0.000315451 |
| 10 | 0.000630902 |
| 15 | 0.000946353 |
| 20 | 0.0012618 |
| 25 | 0.00157725 |
| 50 | 0.00315451 |
| 75 | 0.00473176 |
| 100 | 0.00630902 |
| 250 | 0.0157725 |
| 500 | 0.0315451 |
| 1000 | 0.0630902 |
| 5000 | 0.315451 |
| 10000 | 0.630902 |
Understanding Gallons per minute
The Gallon per minute (symbol: GPM) is a unit of volumetric flow rate. A US customary flow-rate unit (US gallons per minute, where 1 US gallon = 3.785411784 liters per NIST SP 811) used universally in US plumbing, HVAC, fire protection, agricultural irrigation, and swimming-pool circulation. GPM is the primary US sizing unit for residential water softeners (the IAPMO Z601 test method rates ion-exchange capacity at a defined GPM), well-pump submersibles, lawn sprinkler design (the GPM at each emitter sets zone sizing), NFPA 13 fire-sprinkler systems (head-flow allocations in GPM), and pool circulation (turnover rates require X GPM × hours). Reference values: a US WaterSense-certified showerhead is ≤ 2.0 GPM, an older US showerhead is 2.5-3 GPM, a residential dishwasher is ~3-4 GPM peak, a 4-inch municipal fire hydrant delivers 500-1,500 GPM (NFPA test pressure 20 psi residual). 1 GPM = 3.7854 L/min = 0.06309 L/s. Care: US GPM ≠ Imperial GPM (a UK gallon is 4.54609 L, so 1 Imperial GPM = 1.201 US GPM).
It belongs to the imperial measurement system.
Gallons per minute are commonly used in plumbing, HVAC systems, and chemical process engineering.
Understanding Cubic meters per second
The Cubic meter per second (symbol: m³/s) is a unit of volumetric flow rate. The SI unit of volumetric flow rate (ISO 80000-4 §4-30) — the volume of fluid passing a fixed cross-section per unit time. m³/s is the universal unit in fluid-dynamics research (Reynolds and Navier-Stokes work), large-pipeline engineering (offshore oil-export risers, district-energy distribution mains), river and flood hydrology (where it is conventionally called the "cumec" — for "cubic meter per second" — in technical writing), large-scale wastewater treatment, and industrial process flow simulation (Aspen HYSYS, CHEMCAD, OLGA). Reference scale: the Amazon River average discharge is ~209,000 m³/s, the Mississippi ~16,800 m³/s, a major dam spillway flood release ~5,000-15,000 m³/s. Most practical applications use smaller units (L/s, m³/hr, GPM) because m³/s values are typically very small for human-scale equipment — a household faucet is ~0.0002 m³/s. Converting to gallons per minute (US): multiply by 15,850. Converting to L/s: multiply by 1,000.
It belongs to the metric measurement system.
Cubic meters per second are commonly used in plumbing, HVAC systems, and chemical process engineering.
Why Convert Gallons per minute to Cubic meters per second?
Converting between Gallons per minute and Cubic meters per second is a frequent requirement for engineers, scientists, and students working with volumetric flow rate values. Different industries and regions favour different unit systems, so having a dependable conversion tool saves time and prevents errors in technical calculations. Whether you are verifying a specification sheet, cross-checking simulation results, or preparing a report for an international audience, accurate volumetric flow rate conversion is essential.
Frequently Asked Questions
How do I convert Gallons per minute to Cubic meters per second?
A US customary flow-rate unit (US gallons per minute, where 1 US gallon = 3. To convert Gallons per minute to Cubic meters per second, multiply by 6.3090e-5. For example, 25 GPM equals 0.00157725 m³/s.
How many Cubic meters per second are in 1 Gallon per minute?
There are 0.0000630902 Cubic meters per second in 1 Gallon per minute.
How many Gallons per minute are in 1 Cubic meter per second?
There are 15850.3 Gallons per minute in 1 Cubic meter per second.
What is the formula for Gallon per minute to Cubic meter per second conversion?
The formula is: multiply by 6.3090e-5. This means 1 GPM = 0.0000630902 m³/s.
Is a Gallon per minute bigger than a Cubic meter per second?
Yes. One Gallon per minute is larger than one Cubic meter per second because 1 GPM equals 0.0000630902 m³/s, which is less than 1.
When do you need to convert between Gallons per minute and Cubic meters per second?
The SI unit of volumetric flow rate (ISO 80000-4 §4-30) — the volume of fluid passing a fixed cross-section per unit time. Gallon per minute and Cubic meter per second are both volumetric flow units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.