Texas Commission on Environmental Quality (TCEQ). Class C Water License Exam

How does one convert million gallons per day (MGD) to gallons per minute (GPM)?

1. Multiply by 60

2. Divide by 60

3. Add 10

4. Subtract 10

The correct answer is: Multiply by 60

To convert million gallons per day (MGD) to gallons per minute (GPM), you need to understand the relationship between these units of measurement. 1 million gallons is equal to 1,000,000 gallons. There are 1,440 minutes in a day (24 hours x 60 minutes). Therefore, to convert MGD to GPM, you take the volume in million gallons and first convert it to gallons by multiplying by 1,000,000. Then, since you want the flow rate in a minute rather than a day, you divide that number by 1,440 (the total minutes in a day). However, when simply converting from MGD to GPM, you can simplify the process by recognizing that since you are working with million gallons, you just need essentially to perform the conversion based on the measurement period. So, for every million gallons per day, you multiply by 1,000,000, and then since you're looking for gallons per minute, you multiply the million gallons by 1 and then by 60 (since there are 60 minutes in an hour times 24 hours a day totals 1,440 minutes altogether). Thus, the conversion from million gallons per day to gallons