Daily Flow Rate Calculator

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Daily Flow Rate Calculator .flow-calculator-container { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; max-width: 800px; margin: 0 auto; padding: 20px; background-color: #f9f9f9; border: 1px solid #e0e0e0; border-radius: 8px; } .flow-calc-header { text-align: center; margin-bottom: 30px; } .flow-calc-header h2 { color: #2c3e50; margin-bottom: 10px; } .flow-row { display: flex; flex-wrap: wrap; gap: 20px; margin-bottom: 20px; } .flow-col { flex: 1; min-width: 250px; } .flow-label { display: block; font-weight: 600; margin-bottom: 5px; color: #333; } .flow-input { width: 100%; padding: 12px; border: 1px solid #ccc; border-radius: 4px; font-size: 16px; box-sizing: border-box; } .flow-input:focus { border-color: #0073aa; outline: none; } .flow-select { width: 100%; padding: 12px; border: 1px solid #ccc; border-radius: 4px; font-size: 16px; background-color: white; } .calc-btn { display: block; width: 100%; padding: 15px; background-color: #0073aa; color: white; border: none; border-radius: 4px; font-size: 18px; font-weight: bold; cursor: pointer; transition: background-color 0.3s; margin-top: 10px; } .calc-btn:hover { background-color: #005177; } .flow-results { margin-top: 30px; padding: 20px; background-color: #fff; border-left: 5px solid #0073aa; box-shadow: 0 2px 5px rgba(0,0,0,0.05); display: none; } .result-row { display: flex; justify-content: space-between; margin-bottom: 10px; padding-bottom: 10px; border-bottom: 1px solid #eee; } .result-row:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; } .result-label { color: #555; } .result-value { font-weight: bold; color: #2c3e50; font-size: 1.1em; } .error-msg { color: #d32f2f; margin-top: 10px; display: none; font-weight: bold; } .content-section { margin-top: 40px; line-height: 1.6; color: #333; } .content-section h3 { margin-top: 25px; color: #2c3e50; } .content-section ul { margin-bottom: 20px; } .content-section li { margin-bottom: 8px; } function calculateDailyFlow() { var rateInput = document.getElementById('flowRate'); var timeUnit = document.getElementById('timeUnit'); var hoursInput = document.getElementById('operationHours'); var resultDiv = document.getElementById('flowResults'); var errorDiv = document.getElementById('flowError'); var rate = parseFloat(rateInput.value); var basis = timeUnit.value; // 'sec', 'min', 'hr' var hours = parseFloat(hoursInput.value); // Validation if (isNaN(rate) || isNaN(hours)) { errorDiv.style.display = 'block'; errorDiv.innerHTML = "Please enter valid numeric values for Flow Rate and Operational Hours."; resultDiv.style.display = 'none'; return; } if (hours 24) { errorDiv.style.display = 'block'; errorDiv.innerHTML = "Operational hours must be between 0 and 24."; resultDiv.style.display = 'none'; return; } errorDiv.style.display = 'none'; // Calculation Logic var perMinute = 0; var perHour = 0; // Normalize to Hourly Rate first if (basis === 'sec') { perHour = rate * 3600; } else if (basis === 'min') { perHour = rate * 60; } else if (basis === 'hr') { perHour = rate; } // Calculate Daily Total based on operation hours var dailyTotal = perHour * hours; // Calculate standard 24-hour potential (theoretical max) var maxDaily = perHour * 24; // Display Results document.getElementById('resHourly').innerText = perHour.toLocaleString(undefined, {maximumFractionDigits: 2}); document.getElementById('resDaily').innerText = dailyTotal.toLocaleString(undefined, {maximumFractionDigits: 2}); document.getElementById('resMax').innerText = maxDaily.toLocaleString(undefined, {maximumFractionDigits: 2}); // Dynamic labels based on hours document.getElementById('hoursLabel').innerText = hours + " Hours"; resultDiv.style.display = 'block'; }

Daily Flow Rate Calculator

Convert instantaneous flow rates (per second/minute/hour) into total daily volume.

Enter the volume number (e.g. Gallons, Liters)
Per Minute (e.g. GPM, LPM) Per Second (e.g. GPS, LPS) Per Hour (e.g. GPH, LPH)
How long the flow is active daily (Default: 24)
Calculated Hourly Flow: 0 units/hour
Total Daily Volume (24 Hours): 0 units
Theoretical Max (24h continuous): 0 units

What is Daily Flow Rate?

The Daily Flow Rate is a volumetric measure representing the total amount of fluid that passes through a specific point over the course of a day. This metric is critical in various industries, including wastewater management, irrigation, industrial chemical processing, and civil engineering. Unlike an instantaneous flow rate (like Gallons Per Minute or Liters Per Second), the daily flow rate accounts for the duration of time the system is active.

How to Calculate Daily Flow Rate

To calculate the daily flow, you must first normalize your current flow rate to an hourly figure and then multiply it by the number of hours the system operates per day.

The basic formula is:

  • Daily Flow = (Flow Rate x Time Conversion Factor) x Hours of Operation

Time Conversion Factors:

  • If Rate is Per Second: Multiply by 3,600 to get Hourly Rate.
  • If Rate is Per Minute: Multiply by 60 to get Hourly Rate.
  • If Rate is Per Hour: Multiply by 1 (no change).

Real-World Example

Imagine a water pump rated at 45 Gallons Per Minute (GPM). The pump runs for 8 hours a day during irrigation cycles.

  1. Convert minutes to hours: 45 GPM x 60 = 2,700 Gallons Per Hour (GPH).
  2. Calculate Daily Total: 2,700 GPH x 8 Hours = 21,600 Gallons per Day.

Applications of Flow Rate Calculation

  • Water Treatment: Calculating Million Gallons Per Day (MGD) to size filtration systems.
  • Irrigation: Determining total water usage to comply with agricultural water rights.
  • Leak Detection: Comparing expected daily volume vs. actual meter readings to identify leaks.
  • Industrial: Monitoring coolant or reactant flow over production shifts.

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