Fluids converters
Flow Converter
Convert volumetric flow rates: m³/s, litres per minute, CFM, GPM and barrels per day.
Result
37.8541 L/min
10 gpm = 37.8541 L/min
All units for this value
| Unit | Symbol | Value |
|---|---|---|
| Cubic meter per second | m³/s | 0.000630902 |
| Cubic meter per minute | m³/min | 0.0378541 |
| Cubic meter per hour | m³/h | 2.27125 |
| Cubic meter per day | m³/day | 54.5099 |
| Liter per second | L/s | 0.630902 |
| Liter per minute | L/min | 37.8541 |
| Liter per hour | L/h | 2271.25 |
| Milliliter per second | mL/s | 630.902 |
| Cubic centimeter per minute | cm³/min | 37854.1 |
| Cubic foot per second | ft³/s | 0.0222801 |
| Cubic foot per minute (CFM) | ft³/min | 1.33681 |
| Cubic foot per hour | ft³/h | 80.2083 |
| Cubic inch per second | in³/s | 38.5 |
| Cubic inch per minute | in³/min | 2310 |
| US gallon per second | gal/s | 0.166667 |
| US gallon per minute (GPM) | gpm | 10 |
| US gallon per hour | gal/h | 600 |
| US gallon per day | gal/day | 14400 |
| UK gallon per minute | UK gpm | 8.32674 |
| UK gallon per hour | UK gal/h | 499.605 |
| Oil barrel per day | bbl/day | 342.857 |
| Oil barrel per hour | bbl/h | 14.2857 |
About this calculator
Flow rate measures how much volume of a fluid moves past a point over time, such as water through a pipe or fuel through a nozzle. This converter switches between metric units like liters per minute, US units like gallons per minute and cubic feet per minute, and oil-industry units like barrels per day.
How it works in plain English
Every flow unit here describes a volume divided by a time, so the converter anchors all of them to cubic meters per second and rescales your entered value through that common base. Metric volumes such as cubic meters, liters, and milliliters combine with time units from seconds up to days using straightforward factor-of-ten and factor-of-60 or factor-of-3600 steps.
US and Imperial volumes bring in the cubic foot (0.028316846592 m³), the cubic inch (1.6387064×10⁻⁵ m³), the US gallon (0.003785411784 m³), and the slightly larger UK gallon (0.00454609 m³), each of which needs its own conversion factor before it can be compared to a metric figure. Oil-industry flow is commonly reported in barrels per day, where one barrel equals 0.158987294928 m³, a figure that traces back to the standard 42-US-gallon oil barrel used across the industry.
Pick a from and to unit, enter a value, and the result updates immediately, with a full table showing that same flow rate across every supported unit at once. A precision control adjusts how many decimal places are displayed, and a swap button reverses the two selected units in a single click.
The formula
- value_in_target = value_in_source × (source factor to m³/s) ÷ (target factor to m³/s)
- 1 gallon(US)/min = 0.003785411784 ÷ 60 = 6.30902×10⁻⁵ m³/s
- 1 ft³/min (CFM) = 0.028316846592 ÷ 60 = 4.71947×10⁻⁴ m³/s
- 1 barrel/day = 0.158987294928 ÷ 86400 = 1.84003×10⁻⁶ m³/s
Worked example
Suppose a pump datasheet lists a flow rate of 50 gallons per minute and an engineer needs that expressed in liters per minute for a metric project specification. Multiplying 50 by the US gallon factor of 0.003785411784 m³ and converting through the common base gives about 189.27 liters per minute.
Entering 50 into the gallon-us-per-minute field with liter-per-minute selected as the target shows roughly 189.27 L/min right away. The full unit table also reports this same flow as approximately 0.003155 m³/s, 11.36 m³/h, and about 68.6 barrels per day, all calculated from that single entered figure without any further typing.
Common flow rate conversion factors
| Unit | Value in m³/s |
|---|---|
| 1 liter/minute | 0.00001667 |
| 1 ft³/min (CFM) | 0.000471947 |
| 1 gallon(US)/min (GPM) | 0.0000630902 |
| 1 gallon(UK)/min | 0.0000757682 |
| 1 m³/hour | 0.000277778 |
| 1 barrel(oil)/day | 0.00000184003 |
Standard unit definitions
Frequently asked questions
What is the difference between CFM and GPM?
CFM (cubic feet per minute) measures volume of gas or liquid in cubic feet moving each minute, commonly used for air handling and ventilation, while GPM (gallons per minute) measures volume in US gallons per minute, common in water and pump applications. Both describe a volumetric flow rate, just using different volume units, and this converter switches between them directly.
Why does barrel per day use the oil barrel and not another barrel size?
The barrel unit here is the standard oil barrel of 42 US gallons (0.158987294928 m³), which is the industry-standard figure used worldwide for crude oil and petroleum product volumes. Other industries occasionally use differently sized barrels, but this converter follows the widely recognized oil-industry definition.
Are US gallons and UK gallons the same size?
No, a US gallon (0.003785411784 m³) is smaller than a UK (Imperial) gallon (0.00454609 m³), so flow rates given in gallons per minute can differ noticeably depending on which gallon is meant. This converter lists them as separate units so a value in one is never mistaken for the other.
How does the converter handle different time periods like per hour versus per day?
Each unit's underlying factor already includes its time period, so a value in cubic meters per day is scaled by 1/86400 relative to cubic meters per second before conversion. This lets you convert directly between a per-second unit and a per-day unit without manually working out the number of seconds in a day.
Can I convert a flow rate from a pipe sizing chart that uses cubic meters per hour?
Yes. Select cubic-meter-per-hour as the from unit, choose whatever target unit you need such as liters per minute or gallons per minute, and enter the figure from the chart. The converter applies the exact time-scaling factor automatically so the result matches what the chart intends.
Related converters
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