Volumetric Flow Rate Conversion Calculator

This calculator helps you convert volumetric flow rates between different common units. Volumetric flow rate is the measure of the volume of fluid that passes through a given surface per unit of time. It's a crucial parameter in many engineering and scientific applications, including fluid mechanics, chemical engineering, and environmental science.

Understanding Volumetric Flow Rate

Volumetric flow rate (often denoted as Q) quantifies the volume of fluid that passes through a specific area in a unit of time. It's distinct from mass flow rate, which measures the mass of fluid per unit of time. Key applications include:

• Water and Wastewater Systems: Measuring the flow in pipes, channels, and treatment plants.
• Industrial Processes: Controlling the delivery of liquids or gases in manufacturing.
• HVAC Systems: Calculating air or refrigerant flow.
• Automotive: Measuring fuel injection rates or exhaust flow.

The standard SI unit for volumetric flow rate is cubic meters per second (m³/s). However, various other units are commonly used depending on the industry and region, such as liters per minute (L/min), US gallons per minute (GPM), and cubic feet per minute (CFM).

function convertFlowRate() { var inputValue = parseFloat(document.getElementById("inputValue").value); var inputUnit = document.getElementById("inputUnit").value; var outputUnit = document.getElementById("outputUnit").value; var resultDiv = document.getElementById("result"); if (isNaN(inputValue)) { resultDiv.innerHTML = "Please enter a valid number for the value."; return; } var valueIn_m3_per_s; // Convert input value to a base unit (m³/s) switch (inputUnit) { case "m3_per_s": valueIn_m3_per_s = inputValue; break; case "l_per_s": valueIn_m3_per_s = inputValue / 1000; break; case "l_per_min": valueIn_m3_per_s = inputValue / 1000 / 60; break; case "m3_per_min": valueIn_m3_per_s = inputValue / 60; break; case "gpm_us": // 1 US Gallon = 0.00378541 m³ // 1 Minute = 60 seconds valueIn_m3_per_s = inputValue * 0.00378541 / 60; break; case "gpm_imp": // 1 Imperial Gallon = 0.00454609 m³ valueIn_m3_per_s = inputValue * 0.00454609 / 60; break; case "cfm": // 1 Cubic Foot = 0.0283168 m³ valueIn_m3_per_s = inputValue * 0.0283168 / 60; break; case "ml_per_s": valueIn_m3_per_s = inputValue / 1000000; break; default: resultDiv.innerHTML = "Invalid input unit selected."; return; } var convertedValue; // Convert from base unit (m³/s) to the desired output unit switch (outputUnit) { case "m3_per_s": convertedValue = valueIn_m3_per_s; break; case "l_per_s": convertedValue = valueIn_m3_per_s * 1000; break; case "l_per_min": convertedValue = valueIn_m3_per_s * 1000 * 60; break; case "m3_per_min": convertedValue = valueIn_m3_per_s * 60; break; case "gpm_us": // 1 m³ = 264.172 US Gallons convertedValue = valueIn_m3_per_s * 264.172 * 60; break; case "gpm_imp": // 1 m³ = 219.969 Imperial Gallons convertedValue = valueIn_m3_per_s * 219.969 * 60; break; case "cfm": // 1 m³ = 35.3147 Cubic Feet convertedValue = valueIn_m3_per_s * 35.3147 * 60; break; case "ml_per_s": convertedValue = valueIn_m3_per_s * 1000000; break; default: resultDiv.innerHTML = "Invalid output unit selected."; return; } resultDiv.innerHTML = inputValue + " " + inputUnit + " = " + convertedValue.toFixed(6) + " " + outputUnit; }