Volumetric flow rate (Q) is the volume of fluid that passes through a given surface per unit time. It's measured in units like m³/s (SI), L/min, gal/min (GPM), or ft³/s (CFS). The formula is Q = A × v, where A is cross-sectional area and v is fluid velocity. It's essential in piping design, pump selection, and process engineering.
Flow Converter
Convert between volumetric flow rate units including m³/s, L/min, gal/min, ft³/h and more with scientific precision.
Conversion Formula
1 m³/s = 1000 L/s
Common Conversions
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How to Use Fluid Tools Converter
Our fluid tools converter is engineered for precision in fluid mechanics, chemical engineering, and process engineering applications. Follow these steps to get accurate conversions instantly.
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Select a Category Choose from 7 fluid categories using the sidebar (desktop) or dropdown (mobile).
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Choose Source Unit Pick the unit you want to convert from in the first dropdown.
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Choose Target Unit Select the unit you want to convert to in the second dropdown.
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Enter Value Type your number — the result appears instantly as you type.
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Swap Units Click the swap button to instantly reverse the conversion direction.
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View Formula The exact conversion formula is displayed below for verification.
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Frequently Asked Questions
Volumetric flow measures volume per unit time (m³/s), while mass flow measures mass per unit time (kg/s). They're related by density: mass flow = volumetric flow × density. Mass flow is preferred in chemical engineering because it's independent of temperature and pressure changes, unlike volumetric flow which varies with these conditions.
Molar flow rate measures the number of moles of substance passing through a surface per unit time (mol/s). It's used in chemical engineering, reaction kinetics, and stoichiometry calculations. Molar flow is essential for balancing chemical equations, designing reactors, and calculating reaction rates. Common units include mol/s, kmol/h, and lbmol/min.
Dynamic viscosity (μ) measures a fluid's internal resistance to flow, expressed in Pa·s or centipoise (cP). Kinematic viscosity (ν) is dynamic viscosity divided by density (ν = μ/ρ), expressed in m²/s or centistokes (cSt). Dynamic viscosity is an absolute property, while kinematic viscosity accounts for how density affects flow behavior. Water at 20°C has μ ≈ 1 mPa·s and ν ≈ 1 cSt.
A poise (P) is the CGS unit of dynamic viscosity, equal to 0.1 Pa·s. A centipoise (cP) is 1/100 of a poise, equal to 1 mPa·s. Water at 20°C has a viscosity of approximately 1 cP. The centipoise is widely used in industry because it provides convenient numbers for common fluids. Honey has ~2000 cP, motor oil ~100-500 cP.
Surface tension is the force per unit length acting at the surface of a liquid, caused by molecular cohesion. It's measured in N/m (SI), mN/m, dyn/cm (CGS), or lbf/ft. Water at 20°C has surface tension of ~72.8 mN/m. Surface tension affects capillary action, droplet formation, and wetting behavior.
Permeability measures how easily fluids flow through porous materials like rock, soil, or filters. A Darcy (D) is the standard unit, named after Henry Darcy. One Darcy ≈ 9.86923 × 10⁻¹³ m². In petroleum engineering, millidarcy (mD) is commonly used. Sandstone typically has 10-1000 mD permeability, while shale has <0.01 mD.
To convert between flow rate units, use the base unit (m³/s) as an intermediary. For example: 1 m³/s = 1000 L/s = 60,000 L/min = 15,850 gal/min = 35.31 ft³/s. Our converter handles all these conversions automatically. Simply select your source and target units, enter the value, and get instant results.
Yes, the ASLI FORM Fluid Tools Converter is 100% free forever. There are no registration requirements, no usage limits, no subscription fees, and no hidden charges. We do not display advertisements and we do not collect any personal data. Our mission is to provide a premium tool that everyone can use without barriers.
Yes. Once the page loads, all calculations happen locally in your browser. There is no server-side processing, no API calls, and no internet dependency for conversions. This makes the tool perfect for field work, remote locations, laboratories, and anywhere connectivity is limited or unavailable.
For liquids, viscosity decreases as temperature increases (water at 0°C: 1.79 mPa·s, at 100°C: 0.28 mPa·s). For gases, viscosity increases with temperature. This relationship is described by equations like the Arrhenius equation for liquids and Sutherland's formula for gases. Our converter handles unit conversions; temperature effects require separate calculations.
Absolutely. Our converter is designed with a mobile-first responsive approach and works perfectly on every device — from basic keypad phones to 4K desktop displays. The interface adapts intelligently: desktops get a sidebar, tablets get a collapsible sidebar, and mobile devices get optimized dropdowns. Touch interactions and scroll snapping are optimized for mobile.
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