Do you need to convert cubic feet per second (Cfs) to million gallons per day (Mgd)? Convert it using our following tool. Enter cubic feet per second and instantly find the equivalent in million gallons per day.
What Is Cfs to Mgd Conversion?
Before we get into the calculator, it’s essential to understand what Cfs and Mgd represent.

Cfs (Cubic Feet per Second): This is a measure of flow rate, describing how many cubic feet of water pass a point in one second. It’s commonly used in hydrology and engineering to measure river and stream flows.

Mgd (Million Gallons per Day): This is another flow rate measurement, used mainly in water treatment and supply systems. It tells us how many million gallons of water pass a point in one day.
How To Use the Calculator
This calculator has two modes: Basic and Advanced. Here’s how you can use each mode to perform your calculations.
1. Basic Calculator
The Basic Calculator allows you to convert a single value from Cfs to Mgd or vice versa.
 Enter “Cubic Feet Per Second (Cfs)”: Input the flow rate in Cfs. For example, you can enter 10.
 Calculate “Mgd (Million Gallons Per Day)”: Click the “Calculate” button, and the calculator will automatically convert the Cfs to Mgd.
Alternatively, you can enter the Mgd value and leave the Cfs field empty to get the equivalent Cfs.
2. Advanced Calculator
The Advanced Calculator is designed to calculate the total Mgd over a specified number of days.
 Enter “Cfs (Cubic Feet Per Second)”: Input the flow rate in Cfs. For example, input 15.
 Enter “Days”: Input the number of days over which you want to calculate the total Mgd. For instance, enter 7.
 Calculate “Total Mgd (Million Gallons Per Day)”: Click the “Calculate” button, and the calculator will show the total Mgd over the specified period.
Formula
Let’s break down the formula and the variables used in the calculator:
$$\text{Mgd}=\text{Cfs}\times 0.538171$$
Variable  Description 

Cfs  Cubic Feet per Second (flow rate) 
Mgd  Million Gallons per Day (flow rate) 
Days  Number of days over which the flow is measured 
How To Convert Cfs To Mgd
Let’s go through two examples to see how the conversion works.
Example 1: Basic Calculation
Convert Cfs to Mgd
Given:
 Cfs = 10
Calculation:
Multiply the Cfs by the conversion factor:
$$\text{Mgd}=10\times 0.538171=5.38171$$
So, 10 Cfs is equivalent to 5.38 Mgd.
Example 2: Advanced Calculation
Calculate Total Mgd Over Multiple Days
Given:
 Cfs = 15
 Days = 7
Calculation:
First, convert Cfs to Mgd:
$$\text{Mgd}=15\times 0.538171=8.072565$$
Then, multiply by the number of days:
$$\text{TotalMgd}=8.072565\times 7=56.508955$$
So, a flow of 15 Cfs over 7 days results in a total of 56.51 Mgd.
Final Words
I hope you liked the Cfs To Mgd Calculator. It is a handy tool for anyone working with water flow measurements. Please let us know if you have any question or suggestion about the tool.