Liters per second (L/s)
Liters per minute (L/min)
Liters per hour (L/h)
Cubic meters per hour (m³/h)
Gallons per minute (GPM)
Seconds
Minutes
Hours
Days
Calculation Result
function calculateTotalVolume() {
var flow = parseFloat(document.getElementById('flowRate').value);
var fUnit = document.getElementById('flowUnit').value;
var time = parseFloat(document.getElementById('timeValue').value);
var tUnit = document.getElementById('timeUnit').value;
if (isNaN(flow) || isNaN(time)) {
alert('Please enter valid numeric values for flow rate and time.');
return;
}
// Convert Flow to Liters per Second (L/s)
var flowLPS = 0;
if (fUnit === 'lps') flowLPS = flow;
else if (fUnit === 'lpm') flowLPS = flow / 60;
else if (fUnit === 'lph') flowLPS = flow / 3600;
else if (fUnit === 'm3h') flowLPS = (flow * 1000) / 3600;
else if (fUnit === 'gpm') flowLPS = (flow * 3.78541) / 60;
// Convert Time to Seconds
var timeSec = 0;
if (tUnit === 'sec') timeSec = time;
else if (tUnit === 'min') timeSec = time * 60;
else if (tUnit === 'hr') timeSec = time * 3600;
else if (tUnit === 'day') timeSec = time * 86400;
// Calculate Total Volume in Liters
var totalLiters = flowLPS * timeSec;
// Conversions
var totalGallons = totalLiters * 0.264172;
var totalM3 = totalLiters / 1000;
var totalFt3 = totalLiters * 0.0353147;
// Display results
document.getElementById('volumeResultBox').style.display = 'block';
document.getElementById('mainResultValue').innerHTML = totalLiters.toLocaleString(undefined, {maximumFractionDigits: 4}) + ' Liters';
document.getElementById('volLiters').innerHTML = '' + totalLiters.toLocaleString(undefined, {maximumFractionDigits: 4}) + ' L';
document.getElementById('volGallons').innerHTML = '' + totalGallons.toLocaleString(undefined, {maximumFractionDigits: 4}) + ' Gallons (US)';
document.getElementById('volM3').innerHTML = '' + totalM3.toLocaleString(undefined, {maximumFractionDigits: 6}) + ' m³';
document.getElementById('volFt3').innerHTML = '' + totalFt3.toLocaleString(undefined, {maximumFractionDigits: 4}) + ' ft³';
}
Understanding the Relationship Between Flow Rate and Volume
Calculating the total volume of fluid passing through a system is a fundamental task in engineering, plumbing, and irrigation. Whether you are filling a swimming pool, monitoring a chemical dosing system, or calculating water usage for a commercial facility, the formula remains consistent.
The Basic Formula
The total volume (V) is the product of the flow rate (Q) and the elapsed time (t):
Volume = Flow Rate × Time
Practical Examples
Example 1: If a garden hose has a flow rate of 10 Liters per minute (L/min) and you leave it running for 20 minutes, the total volume is 10 × 20 = 200 Liters.
Example 2: An industrial pump moves 5 Cubic Meters per hour (m³/h). In 4 hours, it will move 20 m³ of liquid.
Example 3: A slow leak drips at 0.5 Gallons per minute (GPM). Over a full day (1,440 minutes), that leak wastes 720 gallons of water.
Important Conversion Factors
When performing these calculations manually, ensure your units match. Here are common conversions used in our calculator:
Unit
Conversion
1 Cubic Meter (m³)
1,000 Liters
1 US Gallon
3.78541 Liters
1 Cubic Foot (ft³)
28.3168 Liters
Why Accuracy Matters
In municipal water treatment or chemical processing, even a small error in calculating volume from flow rate can lead to overfilling tanks or incorrect chemical concentrations. Utilizing a flow-to-volume calculator ensures that conversions between metric and imperial units are handled precisely, reducing the risk of manual calculation errors.