Total Time & Flow Rate to Total Volume Calculator

This tool will calculate the volume of a fluid flowed over a set period of time at a specified volumetric flow rate. 

Introduction

This Total Volume Calculator helps users, technicians, and students quickly determine the total volume of a fluid transferred over a given period of time when the flow rate is known. By entering a flow rate (such as gallons per minute or liters per second) and a time duration (such as minutes or hours), the calculator automatically computes the total volume in the desired units.

This tool is widely used in piping, water distribution, chemical processing, oil & gas, and HVAC applications, where knowing the volume transferred is essential for system design, material balance, and operational efficiency.

Total Time & Flow Rate to Total Volume Calculator

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How the Calculator Works

The calculation is based on the fundamental volumetric flow rate formula:

                                                 Q = V / t

Symbols

  • Q = Volume flow rate
  • V = Volume transferred
  • t = Time

Example Calculation

Suppose water flows at a rate of 50 liters per minute (L/min) for 2 hours.

  1. Convert time: 2 hours = 120 minutes

  2. Multiply: V = 50 × 120 = 6000 liters

  3. Convert to cubic meters: 6000 ÷ 1000 = 6 m³

So, a pump delivering 50 L/min over 2 hours will transfer 6 cubic meters of water.

Supported Units

This calculator supports multiple flow rate and volume units, including:

  • Flow rate units: L/min, L/s, m³/hr, gal/min (US & UK), ft³/min

  • Time units: seconds, minutes, hours, days

  • Volume units: liters, cubic meters, gallons, cubic feet

Applications of Flow Rate to Volume Conversion

  • Water Supply Systems – Estimate how much water is supplied over time
  • Pumping Calculations – Determine tank filling or emptying time
  • Process Engineering – Track batch volumes in chemical plants
  • Oil & Gas – Calculate crude oil or gas transferred in pipelines
  • HVAC Systems – Measure chilled water or air volume flow over time