Liters-per-Minute Calculator
Free online Liters-per-Minute Calculator that runs directly in your browser.
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1Enter data
Enter content, paste text or load a file from disk. -
2Click the button
The tool will immediately process your data in the browser. -
3Get the result
Copy the finished text or save the file to your device.
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Liters Per Minute Calculator
Professional liquid flow and pump efficiency converters.
Input parameters
Waiting for data
Enter the parameters on the left and click "Calculate result" to see the detailed flow report.
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Other tools you may find usefulLiters per minute (l/min) calculator - flow and pump efficiency converter
There are two types of situations: either you already have the flow specified (e.g. from the pump nameplate), or you only have the volume and time (e.g. filling the tank in 45 minutes). This calculator covers both scenarios and immediately shows the result in the most commonly used units: l/min, l/s, m³/h and GPM - without fussing and without manual conversions.
free online without registration result immediately pumps and installations l/min ⇄ m³/h ⇄ GPM
Flow (i.e. the amount of liquid that "flows" through the system over time) is one of those parameters that can ruin the entire project, if you count them wrong. Poorly selectedpump capacityis a classic: either it "does not demand" and the installation works sluggishly, or it is oversized and problems with pressure, noise, energy consumption or valve throttling begin. That is why theflow converterin a practical form is so useful: you enter the data and the calculator gives you a coherent set of units that are actually used on the construction site, in the service and in the documentation.
What can you calculate with this calculator?
Mode 1: "I know the flow"
You select the unit in which you have input data (e.g.l/min, l/s, m³/horGPM) and enter the value. This is the most common case when you read parameters from a data sheet, nameplate or flow meter.
The calculator will convert everything into a common base and show you the full set of results - so you don't have to make several separate calculations or wonder if you've made a mistake multiplying by 60.
Mode 2: "Volume / time"
Perfect for "real-life" tests: you fill a known volume (bucket, barrel, IBC tank) and measure the time. You entervolume(liters, m³ or gallons) andtime(seconds, minutes or hours), and the calculator calculates the average flow.
This is also a great way to quickly check whether the pump actually achieves what the manufacturer promises - because practice can be... more interesting than the catalogue.
How to read the results so that they make sense in practice
This calculator shows several units at the same time, because different industries like different "languages". Plumbing and service often stick tol/min, automation and dosing like to work atl/s, and pumps, industrial and HVAC installations are often described inm³/h. In addition, there isGPM(US gallons per minute), which appears in English-language materials, especially with pumps and equipment from the US market.
In short: the units are different, but they describe the same thing. And the faster you can compare them, the less risk you have of buying something that "almost fits." That's why the calculator immediately shows the full package:l/min, l/s, m³/h, l/hand a few additional metrics that are surprisingly useful when planning the operation of the installation.
Compare models by efficiency, without guessing whether "3.6 m³/h" is a lot or a little in l/min. You'll do it in 10 seconds.
You can quickly calculate how much water actually "goes" per minute and per day - when watering, filling and powering the installation.
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