Conversion Encyclopedia

Flow Rate

Flow Rate Converters

Convert between volumetric flow rate units including L/s, L/min, L/h, m³/s, m³/h, gpm (US & UK), cfm, and cfs using exact time-base relationships.

Conversion paths

Choose a conversion family

Start with the unit system or conversion direction that matches your task. Every published family below leads to its available calculators and reference pages.

SI, imperial, and HVAC flow mirror pairs

Every direction below is a dedicated page so each flow conversion has a direct mirror link.

L/s to L/min L/min to L/s L/s to L/h L/h to L/s L/s to m³/s m³/s to L/s L/s to m³/h m³/h to L/s L/s to gpm gpm to L/s L/s to gpm-uk gpm-uk to L/s L/s to cfm cfm to L/s L/s to cfs cfs to L/s L/min to L/h L/h to L/min L/min to m³/s m³/s to L/min L/min to m³/h m³/h to L/min L/min to gpm gpm to L/min L/min to gpm-uk gpm-uk to L/min L/min to cfm cfm to L/min L/min to cfs cfs to L/min L/h to m³/s m³/s to L/h L/h to m³/h m³/h to L/h L/h to gpm gpm to L/h L/h to gpm-uk gpm-uk to L/h L/h to cfm cfm to L/h L/h to cfs cfs to L/h m³/s to m³/h m³/h to m³/s m³/s to gpm gpm to m³/s m³/s to gpm-uk gpm-uk to m³/s m³/s to cfm cfm to m³/s m³/s to cfs cfs to m³/s m³/h to gpm gpm to m³/h m³/h to gpm-uk gpm-uk to m³/h m³/h to cfm cfm to m³/h m³/h to cfs cfs to m³/h gpm to gpm-uk gpm-uk to gpm gpm to cfm cfm to gpm gpm to cfs cfs to gpm gpm-uk to cfm cfm to gpm-uk gpm-uk to cfs cfs to gpm-uk cfm to cfs cfs to cfm

Scope & Verification

This hub groups related converter families so you can move from the category level to exact routes with one clear basis per page.

  • Families are split so exact-factor, profile-based, density-based, and estimate-style pages do not collapse into one generic answer.
  • Leaf pages keep calculator, common values, FAQ, and reverse routes aligned to the same assumption.
  • Methodology and verification pages document how those assumptions are chosen and checked.
Methodology How We Verify Editorial Policy

Public interfaces

Machine access

Conversions in this hub are represented by the canonical flow-rate family and its registered source and target units.

Its 72 published directions use the same canonical engine through the website, JSON API, OpenAPI and WebMCP.

API & Agent documentation

Explanation

Volumetric flow rate is volume per unit time. This hub normalizes factors through liters per second (L/s), applies exact time-base scaling across per-second, per-minute, and per-hour units, and preserves the US vs UK gallon distinction through fixed definitions. For clarity, conversions are grouped into SI-only, cross-system, and imperial-only pairs.

The Flow Rate hub maps related converter families into directional routes with consistent assumptions.

Open a family hub to reach leaf pages with direct answers, calculator output, and reverse links built on the same constants.

Questions & answers

Frequently Asked Questions

What is the SI unit of volumetric flow rate?

The SI base expression is cubic meters per second (m³/s).

How are L/s and m³/s related?

Exactly: 1 m³ = 1000 L, so 1 m³/s = 1000 L/s.

Why are US gpm and UK gpm different?

They are based on different gallon definitions: 1 US gallon = 3.785411784 L, while 1 UK gallon = 4.54609 L.

How are cfm and cfs related?

They are the same cubic-foot volume with different time bases, so 1 cfs equals exactly 60 cfm.

Are flow rate conversions multiplicative?

Yes. Flow rate families use multiplicative factors with no additive offsets.

How do I switch direction?

Use the switch button to navigate directly to the mirror page for the reverse conversion.

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