Aquarium Volume Calculator: Gallons, Litres Easy Calculator

Whether you’re a seasoned aquarium enthusiast or a beginner setting up your first tank, understanding the volume of your aquarium is a fundamental aspect of successful fishkeeping.

Determining the volume of your aquarium may initially sound like a daunting task, but fear not! With the help of this user-friendly calculator, you’ll be able to effortlessly calculate the volume of your tank in gallons or litres. No complex mathematical equations or confusing formulas—just a few simple measurements and inputs to provide you with an accurate estimate of your aquarium’s volume.

Why Should You Know Your Aquarium’s Volume

So, why is it important to know the volume of your aquarium?

First and foremost, it directly impacts the well-being of your fish and other inhabitants. Different species have specific space requirements and thrive in particular water volumes. By understanding the volume of your tank, you can ensure that you’re providing enough swimming and hiding space for your aquatic friends, preventing overcrowding and reducing stress.

Another critical aspect of aquarium care is maintaining optimal water quality. Knowing the exact volume of your tank is essential for precise dosing of water treatments, conditioners, and additives.

The volume of your aquarium also plays a vital role in determining the filter capacity and flow rate required for effective filtration. Matching the filtration system to the tank’s volume is necessary to maintain optimal water circulation, remove waste, and keep the water parameters stable.

Volume Calculators for Various Tank Shapes

Aquariums come in all shapes. The most common ones are rectangular or square in shape. We have included a calculator for all the standard shapes, followed by an explanation of how the volume is calculated in each case

Rectangular Tank Volume Calculator

To calculate the volume of a rectangular aquarium, you need to know its length, width, and height. The formula to calculate the volume of a rectangular object is:

Volume = length × width × height

Here’s how you can calculate the volume of a rectangular aquarium in both litres and gallons:

To calculate the volume of a rectangular aquarium using centimetres as the standard unit, you can follow these steps:

1. Obtain the tank dimensions: Find the values for the aquarium’s length, width, and height, measured in centimetres.
2. Calculate the volume in cubic centimetres: Multiply the length, width, and height together to obtain the aquarium’s volume in cubic centimetres.
   • Volume (cubic centimetres) = length X width X height
3. Convert the volume to litres: Divide the volume in cubic centimetres by 1000. This conversion factor is used to convert cubic centimetres to litres.
   • Volume (litres) = Volume (cubic centimetres) / 1000
4. Convert the volume to gallons: Divide the volume in litres by 3.78541. This conversion factor is used to convert litres to gallons.
   • Volume (gallons) = Volume (litres) / 3.78541

Throughout these steps, maintain consistent unit conversions to ensure accurate calculations and results.

Square Tank Volume Calculator

To calculate the volume of a square aquarium using centimetres as the standard unit, you can follow these steps:

1. Obtain the side length: Measure the value of the length of any side of the square aquarium in centimetres. It doesn’t matter which side.
2. Calculate the volume in cubic centimetres: Since it’s a square aquarium, the length, width, and height are the same, which is the side length. Multiply the side length by itself three times to obtain the aquarium’s volume in cubic centimetres.
   • Volume (cubic centimetres) = side length × side length × side length
3. Convert the volume to litres: Divide the volume in cubic centimetres by 1000.
   • Volume (litres) = Volume (cubic centimetres) / 1000
4. Convert the volume to gallons: Divide the volume in litres by 3.78541. This conversion factor is used to convert litres to gallons.
   • Volume (gallons) = Volume (litres) / 3.78541

Handle the unit conversions consistently throughout the calculations to ensure accurate results.

Hexagonal Tank Volume Calculator

Hexagonal aquariums are quite rare, but if you have one, you can use the following calculator to determine its volume.

To calculate the volume of a hexagonal aquarium using centimetres as the standard unit, you can follow these steps:

1. Obtain the side length and height: Find out the values for the length of any one of the sides and the overall height of the hexagonal aquarium, measured in centimetres.
2. Calculate the volume in cubic centimetres: The formula to calculate the volume of a hexagonal prism (the 3D shape of a hexagonal aquarium) is given by:
   • Volume (cubic centimetres) = (3 X (√3 / 2)) X side length X side length X height.
   • Here, “√” denotes the square root.
3. Convert the volume to litres: Divide the volume in cubic centimetres by 1000. This conversion factor is used to convert cubic centimetres to litres.
   • Volume (litres) = Volume (cubic centimetres) / 1000
4. Convert the volume to gallons: Divide the volume in litres by 3.78541. This conversion factor is used to convert litres to gallons.
   • Volume (gallons) = Volume (litres) / 3.78541
     

Cylindrical Tanks

To calculate the volume of a cylindrical aquarium using centimetres as the standard unit, you can follow these steps:

1. Obtain the measurements: Figure out the necessary measurements for the cylindrical aquarium. You will need the radius (r) and height (h) of the cylinder, measured in centimetres.
2. Calculate the volume in cubic centimetres: The formula to calculate the volume of a cylinder is given by:
   • Volume (cubic centimetres) = π X radius^2 X height.
   • Here, “π” represents the mathematical constant pi (approximately 3.14159).
   • Multiply the square of the radius by the height, and then multiply that by pi to obtain the volume in cubic centimetres.
3. Convert the volume to litres: Divide the volume in cubic centimetres by 1000.
   • Volume (litres) = Volume (cubic centimetres) / 1000
4. Convert the volume to gallons: Divide the volume in litres by 3.78541. This conversion factor is used to convert litres to gallons.
   • Volume (gallons) = Volume (litres) / 3.78541

Using Indirect Methods To Measure Volume Of Irregularly Shaped Aquariums

When dealing with irregularly shaped aquariums, accurately measuring their volume can be challenging. However, there are indirect methods you can use to determine the volume without relying on complex mathematical calculations. Two commonly used methods are:

Bucket or Container Method

This method involves using a bucket or container with a known volume to fill the aquarium and measure the number of buckets required. Here’s how you can use this method:

• Fill the bucket or container with a known volume, such as 1 litre or 1 gallon.
• Slowly pour the water from the bucket into the aquarium, keeping track of the number of times you need to refill the bucket.
• Count the total number of times you emptied and refilled the bucket.
• Multiply the number of times by the known volume of the bucket to estimate the total volume of the aquarium.

While this method can give you a rough estimate of the aquarium’s volume, it may not be entirely accurate due to variations in pouring and potential water displacement. It can also become quite tiring, especially if you have a large tank.

Water Flow Metre Method:
Another indirect method involves using a water flow metre to measure the amount of water required to fill the aquarium. Here’s how you can use this method:

• Connect a water flow metre to your water source and ensure it is calibrated correctly.
• Place the flow metre in the aquarium’s fill line or use it to measure the flow rate while filling the tank.
• Measure the time it takes to fill the aquarium completely.
• Multiply the flow rate by the filling time to obtain an estimate of the aquarium’s volume.

This method provides a more accurate estimation of the aquarium’s volume as it directly measures the amount of water required to fill the tank. It is also a lot more convenient. However, it requires additional equipment and setup.

Gallons to Litres Conversion:

Here is how you can do the calculations manually

1 gallon = 3.78541 litres

To convert gallons to litres, multiply the number of gallons by 3.79. For example, if you have 5 gallons, the conversion would be:

5 X 3.79 = 18.95 litres

To convert litres to gallons, divide the number of litres by 3.79. For example, if you have 20 litres, the conversion would be:

20 / 3.79 = 5.28 gallons

Common conversions for popular tank sizes

Here’s a chart listing popular aquarium volumes in gallons and their corresponding values in litres:

Please note that this chart provides approximate values based on the conversion factor of 1 gallon equals 3.78541 litres.

Tips On Accurately Measuring An Aquarium’s Dimensions

Accurately measuring an aquarium’s dimensions is crucial for calculating volume, determining appropriate tank sizes, and fitting equipment. Here are some tips to help you measure an aquarium accurately:

• Use a reliable measuring tool: Choose a measuring tape or ruler that provides accurate measurements. Make sure the measuring tool is straight and not bent or stretched.
• Measure the inside dimensions: For accurate volume calculations, measure the inside dimensions of the aquarium, including the length, width, and height.
• Measure in the correct units: Use consistent units throughout your measurements. If you’re using inches, stick to inches for all dimensions. Similarly, if you’re using centimetres, use centimetres for all measurements. Avoid mixing different units.
• Measure to the nearest decimal place: Try to measure as precisely as possible. Use a measuring tool that allows you to measure to at least one decimal place (e.g., 0.1 centimetre or 0.1 inch).
• Account for curved or irregular surfaces: If you’re measuring a curved or irregularly shaped aquarium, use a flexible measuring tape or a string to follow the contours of the surface. Take multiple measurements at different points and calculate an average to ensure a reasonable level of accuracy.
• Double-check your measurements: It’s a good practice to double-check your measurements to minimise errors. Measure each dimension at least twice to confirm consistency.
• Consider the thickness of the glass or acrylic: If you’re measuring the external dimensions of an aquarium, remember to account for the thickness of the glass or acrylic when calculating the internal dimensions. Subtract the thickness from each corresponding dimension.

Follow these tips to ensure accurate measurements of an aquarium’s dimensions, which will contribute to better decision-making and efficient management of your aquarium.

Water Depth and Substrate Considerations When Measuring Volume

When measuring the volume of an aquarium, consider the water depth and substrate considerations. Here are some tips to consider:

• Measure the water depth accurately: The water depth plays a significant role in determining the volume of the aquarium. Measure the depth of the water from the highest point to the lowest point in a straight line. Avoid measuring over any decorations, substrate, or uneven surfaces.
• Consider substrate displacement: If your aquarium has a substrate (gravel, sand, etc.), it occupies space within the tank that affects the total volume. When measuring the water depth, account for the height of the substrate. Measure from the bottom of the tank to the water surface, including the substrate height.
• Subtract substrate volume: To calculate the volume of water only, you need to subtract the volume occupied by the substrate. Measure the length, width, and height of the substrate layer and calculate its volume separately. Then, subtract this volume from the total volume of the aquarium.
• Account for irregularities: If your substrate has variations in depth or contours, take multiple measurements at different points to account for these irregularities. Calculate an average depth to ensure a more accurate volume measurement.
• Consider water displacement: When measuring the volume of water, take into account any objects or decorations that displace water. For example, if you have large rocks or ornaments in the tank, they will displace water and reduce the total volume. Make sure to measure the water depth without including these objects.

Sump Tanks and External Filters:

To calculate the volume of an aquarium that includes a sump tank and external filters, you need to consider the volumes of each component separately and then add them together. Here’s how you can calculate it:

Aquarium Volume

Measure the dimensions of your main aquarium

Calculate the volume using the calculator or manually, as explained previously

Sump Tank Volume

                Measure the dimensions of your sump tank

                Similarly, calculate the volume of the sump tank.

External Filter Volume

If your external filter has a specific volume listed, use that value. Otherwise, you can estimate it based on its dimensions, similar to how you calculated the aquarium and sump tank volumes.

Once you have obtained the volumes of the aquarium, sump tank, and external filter, you can add them together to get the system’s total volume.

Aquarium Volume Conversion Chart

Here’s an aquarium volume chart that lists popular dimensions for aquariums, along with their corresponding volumes in litres and gallons:

Please note that the above values are approximate and may vary slightly depending on the aquarium’s exact measurements.

Frequently Asked Questions:

Why is it important to know the volume of my aquarium?

Knowing the volume of your aquarium is essential for various reasons. It helps you determine the appropriate number of fish, calculate the amount of water conditioner or medication needed, and properly size equipment such as filters and heaters.

Can I use the Aquarium Volume Calculator for irregularly shaped aquariums with complex layouts?

Our calculator works best for standard-shaped aquariums. It may be challenging to calculate the volume accurately for irregularly shaped aquariums or those with complex layouts. In such cases, it is advisable to use the indirect method.

Conclusion

Understanding the volume of your aquarium is crucial for several reasons. It helps you determine appropriate stocking levels, calculate the necessary amount of water conditioner or medication, and select suitable equipment such as filters and heaters.

The Aquarium Volume Calculator provided here offers a convenient and straightforward way to calculate the volume of various aquarium shapes, including rectangular, square, cylindrical, and hexagonal tanks. We also have included a helpful chart that lists dimensions and their corresponding volumes.