How Many Gallons Does a Laundry Sink Hold?

One of the common questions asked when purchasing a laundry sink is how many gallons does it hold. When searching for the ideal size and style of the sink to install in your laundry room, it is essential to know the capacity in gallons of the sink. This is because the capacity affects the ability of the sink to perform certain cleaning and washing tasks. Moreover, it determines how effective the laundry sink will be in the long run. Check out the rest of the article below for more information.

How many gallons does a laundry sink hold? The number of gallons a laundry sink can hold will have to depend on its size. Average sinks can be able to hold at least three gallons of water. To determine the gallon capacity of the laundry sink, you should multiply the length by the width and the depth of the sink bowl. Divide the answer by 231 which is the cubic volume by inches in a gallon.

What is the capacity of the sink? How much water does the sink hold in liters? How many gallons can a standard sink hold? Make sure that you determine how much water a laundry sink can hold before purchasing. You will find this beneficial especially if you are doing a large volume of laundry.

How many gallons does a laundry sink hold
Image by 2427999 from Pixabay

How Many Gallons is a Standard Sink?

An average kitchen sink can hold 15 to 20 gallons depending on its size. You can find out how many gallons a sink can hold by the size of the sink itself. Three compartment sinks can measure 18 by 18 inches and can hold 14 gallons per compartment. Sinks can measure 24 by 24 inches can hold 25 gallons.

What is the Capacity of a Sink?

The capacity of the sink will have to depend on its size. To determine the gallon capacity of a sink, you need to multiply the length by width by depth. The length is the measurement of the bowl from left to right. Width is measured from the back of the sink to the front. The depth is measured from the bottom of the bowl to the top.

How Much Water Does a Sink Hold in Liters?

A sink can hold around 15 to 18 liters of water. The capacity of the sink is usually not measured by the manufacturer and is also not listed as one of the measurements on the specifications. On the other hand, there is a way to find out the exact capacity of the sink. Bear in mind that measuring the capacity is the same as measuring volume where a container holds water or another liquid. Because sinks hold water, you need to measure the volume so that you can have an ideal capacity measurement. You can use this measurement to compare the capacity of various sinks.

How to Measure a Sink Capacity?

To measure the capacity of the sink, you need to multiply the bowl by its width, depth, and length. When it comes to comparing the capacity of the laundry sink, bear in mind that you are unlikely to fill the sink to the very edge. Thus, subtract a couple of inches from the sink height measurement so that you can have a realistic measurement. Take note that the width and length of the rimmed sink are not the same as the bowl dimensions. Make sure to always use the sink bowl measurement and not the overall dimensions so that you can determine the exact capacity of the sink.

Large Capacity Vs. Small Capacity

Large capacity sinks can hold more laundry and water but require more countertop space. On the other hand, small capacity sinks save space but can hold less capacity for water and laundry. Large capacity sinks will weigh more when full so they will pull down on the countertop and place more pressure and weight on the cabinetry. This is true most especially in under-mount sinks that are mounted under the countertop. Hence, large capacity sinks need strong and sold countertops surfaces to perform properly.

What Size is a Laundry Sink?

Laundry sinks usually measure ten inches to 25 inches deep. They are available in rectangle or square shapes which put every inch of the basin to work. Take note that laundry sinks are exposed to a lot of activity so you should not skimp on the size. Purchasing a sink with a basin that measures 15 inches deep provides a lot of space for soaking large items. You can even wash your pets in a deep basin laundry sink. You can also check out this article that we have written titled, what sizes do utility sinks come in? We have shared the different sizes of utility sinks that you can choose from.

How Do You Calculate a Volume of the Sink?          

To calculate the volume of the sink, multiply the depth of the bowl by its width and multiply that by the length of the sink. Make sure to use the measurement of the sink bowl and not the overall sink dimensions.

How Do You Measure a Utility Sink?

To measure a utility sink, place the straightedge ruler across the top of the sink. With the use of a tape measure, measure the deepest part of the sink basin to the bottom edge of the ruler. When measuring under-mount sinks, also measure the height from the sink to the countertop.

How Do I Know What Size of Sink to Buy?

Make sure to measure the laundry sink so that you can get the right size that will perfectly suit your laundry room. Also, measure the size of the sinkhole. This will give you an idea of the size of the new sink that you need to purchase.

Measure the Depth of the Sink

Use a ruler to measure the depth of the sink correctly. Place the ruler across the bottom of the sink. See to it that the new sink is not shallow or deeper as compared to the old one that you have installed in your laundry room.

Measure the Sink’s Length

The length of the sink starts from the place which is a bit higher than the area where the sink has a curve. Stretch the measuring tape to the same spot near the bottom to get the exact length of the sink basin.

Measure the Width of the Sink

To measure the width of the sink, position the tape slightly higher than the bottom of the sink. Stretch the tape across it from the back to the front to the same place on the other side.

Measure the Top Part Width of the Sink

Take note that the top part of the sink is usually wider than its lower part so need to get the exact measurement. You need to do this especially if you have a top-mount or drop-in type of sink. Turn the sink upside down and measure the flush to the edge of the lip. Also, measure the opening of the cabinet from side to side. To determine the actual size, place the ruler across the top left to the top right corner.

Measure the Countertop Hole

Determine the correct measurement of the countertop by placing the tape across the hole. Hold one end of the tape of the bottom and measure it to the other end. Place the taper from right to left of the hole to measure the width and length of the countertop.

Measure the Cabinet Opening

Some sinks are attached to the cabinet. If you have this kind of sink, you need to measure further than the sink itself. Go under the countertop and measure the top part of the left to the top right corner. See to it that you have the exact measurement so that it will fit perfectly. We have also written this article that discusses is a washing machine can drain into a sump pump. You can check out the article for more information about the topic.

✅ Video – How to Install a Utility Sink

Home Repair Tutor shared the video below on YouTube. It discusses how to install a utility sink. This tutorial shows how to install a utility sink in your home in under 15 minutes. Watch the video below for step-by-step instructions.

Why Do You Need a Sink in the Laundry Room?

Installing a sink in your laundry room will allow you to conveniently perform hand washing. Moreover, it serves many purposes like cleaning shoes, watering houseplants, and even washing your pets. Ordinary sinks will work just fine, but you can also install a utility sink.

Easily Deal with Messy Cleanups

A laundry sink is beneficial when you want to wash dirty clothes and shoes. Since you do not want to clean muddy shoes in your kitchen or bathroom sink, it is good to have a laundry sink where you can easily deal with messy cleanups. Laundry sinks are easy to clean as well. Choose a sink that is made from durable materials like ceramic so that it will not stain or easily chip.

Hand Washing Clothes

Some clothes require to be washed by hands. Hand washing clothes can be challenging if you do not have a laundry sink in your house. By having a laundry sink, you can easily soak stained clothes. You can even dye discolored clothes in the sink.

Watering Houseplants

You probably use a small watering can or jug to water indoor houseplants. You can make the task easier by carrying the plant pots to the laundry sink for watering. Laundry sinks are also useful in cleaning the surface where the plants are kept.

Washing Pets

Laundry sinks provide a convenient place to wash your pets, especially during the winter season. You can give your pet a nice bath in your sink without messing with the rest of the house.


In this article, we have learned how many gallons a laundry sink holds. You can easily determine how many gallons a laundry sink can hold by its size. You can use a simple method of multiplying the length, width, and depth of the sink to find out its gallon, liters, or volume capacity. Finding out how many gallons your laundry sink can hold will determine how effective it will be in the long run. Hence, it is one of the things that you need to check out when you purchase a laundry sink. Thank you for reading!

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