Skip to content
ToolQivo

Flow Rate Converter

Convert GPM, L/min, m³/h, CFM and cfs — and time how long a fill takes.

Converters Reviews Free · no sign-up
Result
—

Quick Tool Overview

The Flow Rate Converter translates volumetric flow between litres per second, per minute and per hour, cubic metres, US and imperial gallons, CFM, cfs and oil barrels per day, and times how long a flow takes to fill a volume.

What it does
Converts volumetric flow between 17 units
You give it
A flow rate and its unit
You get back
The result, daily and yearly volume, and a unit table
Best for
Pumps, fans, plumbing, irrigation and HVAC
Converters Free, unlimited use No sign-up Runs in your browser

About the Flow Rate Converter

Flow rates are quoted in a surprising number of units: pumps in cubic metres per hour or US gallons per minute, fans and ducts in cubic feet per minute, showers and taps in litres per minute, rivers in cubic feet per second and water utilities in million gallons per day.

This converter handles seventeen of them, keeping US and imperial gallons apart — the difference is twenty percent, and mixing them up is the classic mistake. Enter a flow, pick the units and read the answer plus the full table. Give it a volume and it also tells you how long that flow takes to fill it, and how much it moves in a day and in a year.

Key features of the Flow Rate Converter

US and UK gallons apart

US and imperial gallons per minute are separate units, avoiding the 20 percent mix-up.

Air and water units

CFM and m³/h for ventilation sit next to GPM and L/min for water.

Fill-time calculator

Enter a volume in litres to see how long the flow takes to fill it.

Daily and yearly totals

The flow is also expressed as litres per day and cubic metres per year.

Utility-scale units

Million gallons per day and barrels per day cover water works and oil flows.

How to use the Flow Rate Converter

  1. 1

    Enter the flow rate

    Type the value from the pump curve, fan label or meter.

  2. 2

    Pick the units

    Choose the source and target units — US and UK gallons are listed separately.

  3. 3

    Add a volume if you like

    Enter litres to see how long the flow takes to fill a tank, bath or pool.

  4. 4

    Copy any value

    The table shows the flow in every unit; click to copy.

Frequently asked questions

Multiply US gallons per minute by 3.785411784. For imperial gallons per minute multiply by 4.54609 instead.

Reviews of the Flow Rate Converter

What people who use the Flow Rate Converter think of it. Reviews come from visitors and are posted as written.

No ratings yet

Yours would be the first.

  • 5 0 reviews rated 5 stars
  • 4 0 reviews rated 4 stars
  • 3 0 reviews rated 3 stars
  • 2 0 reviews rated 2 stars
  • 1 0 reviews rated 1 star

Write a review

Used this tool? Your rating helps the next person decide.

Your rating

Plain text only — links, email addresses and HTML are not accepted. Your name and review are shown publicly; nothing else is collected. See the privacy policy.

0 reviews

Newest first

No reviews yet

Be the first to rate the Flow Rate Converter. It takes half a minute and no account.

Write the first review

More converters