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Water Bill Calculator


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Water Bill Calculator helps you estimate how much you will likely pay for your water usage by considering factors like water consumption (in gallons) and local water pricing. This way, you can better plan and manage your water-related expenses.

Steps to Use Water Bill Calculator:

We’ve made it easy and straightforward to use this water usage calculator. Follow these simple steps to quickly calculate your water cost per gallon by state, such as:

What to Enter?

  • Insert the values: 
    • Enter the total amount of water you’ve consumed (in gallons)
    • Enter the price of water set by the service provider in your area

What will you Get?

  • Results: Total water bill you need to pay along with step-by-step calculations

Formula to Calculate Water Bill:

The formula that our water bill calculator uses to calculate your water bill per month is as follows:

$$ WB = GWU \times POW $$


  • WB – Water Bill ($)
  • GWU – Gallons of Water Used
  • POW – Price of Water ($/gallon)

How to Calculate Water Bill?

We recommend you use our free water bill calculator for instant calculations. But if you want to calculate it manually, then follow these simple steps to get an answer of how much is water bill per month costs you such as:


Imagine you receive your water bill, and you want to calculate how much it's going to cost you.

Gather Information: First, you need to find out how many gallons of water you've used during the billing period. You check your water meter or your bill, and it says you've used 8,000 gallons of water.

Know the Water Rate: Next, you need to know the price of water in your area. This can vary depending on where you live. Let's say the rate is $0.006 per gallon.

Use the Formula: Water Bill ($) = Gallons of Water Used * Price of Water ($/Gallon)

Now, put the values into the formula:

Water Bill ($) = 8,000 gallons * $0.006/gallon

Calculate: Now, multiply the number of gallons by per gallon price:

Water Bill = 8,000 gallons * $0.006/gallon = $48

So, your water bill for this billing period will be $48. This means you'll need to set aside $48 to cover your water expenses. This calculation helps you understand the cost of water per gallon and allows you to budget accordingly.

Average Water Bill Prices Per Month in 2023 (USD):

This chart provides a clear overview of how much average gallons of water per month residents use on a monthly basis across different states in 2023. So, let's have a look at this:

State Average Water Bill Price/Gallon Per Month in 2023 (USD/gallon) Average Water Bill Price Per Month in 2023 (USD)
Alabama 0.0077 $38.50
Alaska 0.0108 $54.00
Arizona 0.0099 $49.50
Arkansas 0.0074 $37.00
California 0.0170 $84.00
Colorado 0.0105 $52.50
Connecticut 0.0112 $56.00
Delaware 0.0110 $55.00
Florida 0.0090 $45.00
Georgia 0.0078 $39.00
Hawaii 0.0130 $65.00
Idaho 0.0096 $48.00
Illinois 0.0114 $57.00
Indiana 0.0088 $44.00
Iowa 0.0087 $43.50
Kansas 0.0084 $42.00
Kentucky 0.0076 $38.00
Louisiana 0.0072 $36.00
Maine 0.0124 $62.00
Maryland 0.0116 $58.00
Massachusetts 0.0120 $60.00
Michigan 0.0106 $53.00
Minnesota 0.0103 $51.50
Mississippi 0.0071 $35.50
Missouri 0.0089 $44.50
Montana 0.0094 $47.00
Nebraska 0.0092 $46.00
Nevada 0.0100 $50.00
New Hampshire 0.0122 $61.00
New Jersey 0.0144 $72.00
New Mexico 0.0085 $42.50
New York 0.0140 $70.00
North Carolina 0.0069 $34.50
North Dakota 0.0091 $45.50
Ohio 0.0109 $54.50
Oklahoma 0.0083 $41.50
Oregon 0.0097 $48.50
Pennsylvania 0.0118 $59.00
Rhode Island 0.0126 $63.00
South Carolina 0.0080 $40.00
South Dakota 0.0093 $46.50
Tennessee 0.0079 $39.50
Texas 0.0086 $43.00
Utah 0.0095 $47.50
Vermont 0.0070 $35.00
Virginia 0.0082 $41.00
Washington 0.0102 $51.00
West Virginia 0.0200 $100.00
Wisconsin 0.0070 $35.00
Wyoming 0.0107 $53.50


Why is My Water Bill So High?

There are a number of reasons why your water bill average cost may be high. Some of the most common reasons include:

  • Leaks: Leaks in your plumbing can waste a lot of water, which can lead to a high water bill.
  • Unnecessary water use: Running the faucet unnecessarily, taking long showers, or watering your lawn too often can all increase your water usage and bill.
  • High water rates: If you live in an area with high water rates, even a moderate amount of water usage can lead to a high bill.
  • Large family: If you have a large family, you are likely using more water than a smaller household.

How Could I Calculate My Water Consumption?

To calculate water consumption, you can use the following simple formula:

Water consumption = (Ending water meter reading - Starting water meter reading) * Gallons per cubic foot


  • Starting water meter reading is the number of cubic feet of water that were used before the period of time you are measuring.
  • Ending water meter reading is the number of cubic feet of water that was used after the period of time you are measuring.
  • Gallons per cubic foot is a conversion factor that tells you how many gallons of water are equal to one cubic foot of water.

For example, if your starting water meter reading is 100 cubic feet and your ending water meter reading is 120 cubic feet, and you know that there are 7.48 gallons per cubic foot, then your water consumption for that period of time would be:

Water consumption = (120 cubic feet - 100 cubic feet) * 7.48 gallons per cubic foot 

Water consumption = 20 * 7.48 = 149.6 gallons

How Can I Reduce My Water Bill?

Here are some tips on how to reduce your water bill:

  • Fix any leaks in your plumbing: Leaks can waste a lot of water, even when you're not actively using it. Check your faucets, toilets, and pipes for leaks regularly, and fix them immediately.
  • Take shorter showers: Showers account for a large portion of indoor water use. By reducing your shower time by just a few minutes, you can save a significant amount of water and money.
  • Water your lawn less often: Lawns don't need to be watered every day. In fact, overwatering can damage your lawn and lead to higher water bills. Only water your lawn when it needs it, and then water it properly.
  • Install water-efficient appliances: When you're shopping for new appliances, look for ones with the WaterSense label. WaterSense appliances are certified to use less water than standard models.
  • Make small changes to your daily routine: There are a number of small changes you can make to your daily routine to reduce your water usage. For example, turn off the faucet while you brush your teeth or shave, and take full loads of laundry and dishes whenever possible.

By following these tips, you can reduce your water bill and save money on your utilities.

References: Water tariff, Tariff structures, Tariff levels, Tariff adjustment processes

Alan Walker

Studies mathematics sciences, and Technology. Tech geek and a content writer. Wikipedia addict who wants to know everything. Loves traveling, nature, reading. Math and Technology have done their part, and now it's the time for us to get benefits.

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