Free Flow Rate Converter – Convert L/s, GPM, m³/h & CFM

What a Flow Rate Converter Does and How It Works

A flow rate converter re-expresses how much volume passes a point in a given time in a different unit without changing the actual flow. Volumetric flow is volume divided by time, so its units always pair a volume with a period, such as litres per second. The Helperzy version covers the units plumbers, HVAC installers, and engineers meet daily: litres per second, per minute, and per hour on the metric side, cubic metres per second and per hour for larger systems, US gallons per minute for water in North America, and cubic feet per minute for air handling. It exists because a pump might be rated in gallons per minute while a pipe calculation needs litres per second, and mismatched units lead to undersized or oversized systems. The method is simple: your input is first converted into a base unit, the litre per second, and then scaled to every other unit using fixed ratios. The handy ones are 1 litre per minute = 1 divided by 60 litres per second, 1 litre per hour = 1 divided by 3600 litres per second, 1 cubic metre per second = 1000 litres per second, 1 cubic metre per hour = 1 divided by 3.6 litres per second, 1 US gallon per minute = 0.0630902 litres per second, and 1 cubic foot per minute = 0.4719474 litres per second. The per-minute and per-hour divisions by sixty and thirty-six hundred come from the time units. Routing everything through the litre per second keeps the chain consistent, so gallons per minute to litres per second and cubic metres per hour back again always agree. Here is a worked example. A tap that fills a bucket at 60 litres per minute is flowing at exactly 1 litre per second, because you divide by sixty. If a pump is rated at 10 US gallons per minute and you want litres per second for a European pipe-sizing chart, multiply 10 by 0.0630902 to get 0.631 litres per second, or about 37.9 litres per minute. An air handler pushing 500 cubic feet per minute becomes 500 times 0.4719474, or roughly 236 litres per second. Type 60 into the litres-per-minute box and the tool shows 1 litre per second, 3.6 cubic metres per hour, and 15.85 gallons per minute at once, so you can match whatever the equipment specification uses. Real tasks show up across water and air systems. A plumber might convert a shower's flow between litres per minute and gallons per minute to check it meets a spec, an HVAC technician might convert a fan rating from cubic feet per minute to cubic metres per hour to compare European and American equipment, and a gardener might size an irrigation pump quoted in litres per hour against a hose rated in litres per minute. Aquarium keepers checking a filter's turnover, engineers sizing a pipe so the velocity stays safe, and pool owners matching a pump to a filter all lean on the same lookup. The stakes are practical, because a flow that is too low starves a system while one that is too high causes noise, wear, or pressure loss, so matching the right figure in the right unit matters. A few cautions help. This tool handles volumetric flow, the volume of fluid per unit time, not mass flow, which depends on density and is a separate quantity; do not mix the two. Keep the US gallon in mind for the gallons-per-minute figure, since a UK gallon is larger and would give a different factor. Remember that cubic feet per minute for air assumes a stated air condition, because gases compress, so a CFM figure can shift with pressure and temperature in precise engineering work. Always double-check whether a rating is per minute or per hour before converting, as a stray factor of sixty is the most common slip here. Everything runs locally in your browser using standard factors, so it stays fast, keeps working offline once the page has loaded, and never uploads, logs, or stores any value you enter.

Flow Rate Converter Formula & Method

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