How to calculate the volume of water in the aquarium


How to calculate aquarium volume :: aquarium volume calculator :: Equipment and accessories

Tip 1: How to calculate the volume of the aquarium

Volume of your aquarium - This is the starting point for a dozen calculations. The type and quantity of fish and plants, the filter and heater characteristics, the dosage of medicines and fertilizers necessary for the successful functioning of your home ecosystem depend on the volume. How often beginner aquarists are guided by the figure indicated in the factory characteristics of the reservoir and are mistaken, sometimes irreparably for their pets. If you want to turn your aquarium into a real underwater kingdom, you will have to start with mathematics.

You will need

  • - roulette
  • - pencil and paper
  • - calculator


1. If your tank is a parallelogram, you need to measure its width, depth and length from the outside and record these values.

2. Now you have to calculate the internal dimensions. To do this, measure the thickness of the tank wall, multiply by two and subtract the resulting figure from each measurement. For example, wall thickness aquarium 0.5 centimeters. You need to subtract a centimeter from the outer length to find the inner length.

3. Translate centimeters to meters and calculate the volume aquariumusing internal measurements. Multiply the length by the width and height, and you get the volume in cubic meters.

4. Now convert cubic meters to liters. In one cubic meter one thousand liters.

5. Take a standard 50 liter aquarium with a wall thickness of 0.5 centimeters and the following external dimensions of 54x27x35 centimeters. Its internal dimensions will be equal to 53x26x34 centimeters. We subtracted 1 centimeter from each measurement, the wall thickness aquariummultiplied by two. Its volume in cubic meters will be 0.54 x 0.26 x 0.35 = 0.0491 centimeters or 49 liters.

6. It would seem that the difference of 1 liter is not so significant, but this volume corresponds to the amount of water poured into the aquarium to the very edges and only if there is nothing else in the tank. If we do not add water to the edge aquarium at 3 centimeters, then it is still 0.5 liters less water. How do we know this? Multiplying the bottom area by the height from the water surface to the edge aquarium, that is, 0.54 x 0.29 x 0.03 and converting the resulting figure - 0.0042 - from cubic centimeters to liters.

7. Now you can take about a liter of water per volume occupied by the filter and heater. And somewhere in 0.5 liters of snags or other decorative ornaments. And do not forget the algae. But there is still ground! 2 centimeters of basalt crumb will take about 0.8 liters of the total volume. Thus, your 50-liter aquarium actually holds about 47 liters. And the larger the aquarium, the more noticeable the difference between the declared volume and the real one.

Tip 2: How to calculate the volume of the aquarium

An aquarium in a house is not only very beautiful. It has been proven that observing the underwater life calms the nerves, improves mood and puts thoughts in order. But in order that the underwater life not only looks harmonious, but also does not cause inconvenience to underwater inhabitants, it is necessary to create comfortable conditions for them, namely, to choose the right size. aquarium.

You will need

  • calculator or the ability to count in the mind, aquarium scenery and soil, fish


1. First, think carefully about which fish you plan to place in the aquarium. It should not be very closely, otherwise internal wars are inevitable and, as a result, the death of tenants. And this is not what you want to put the aquarium. Therefore, it is necessary to know how much internal space this or that individual requires. As a rule, a peaceful small fish of medium size (5-8 cm) requires 10-15 liters. Accordingly, the larger the fish and the more aggressive it is, the more space it needs to get along peacefully with its neighbors.

2. Decide which interior decorations you want to place, which plants in which soil you plant.
We must not forget that the scenery, plants and soil occupy a certain amount of internal space of the aquarium. The thickness of the soil layer depends on the size of its particles and ranges from 3 to 8 centimeters. That is, the larger the particles, the thicker the soil should be in the aquarium. The background can also be voluminous (although more often it is not), so do not forget to take this into account.

3. Taking into account all the selected positions, calculate the volume of aquarium you need. As a rule, the volume is already indicated in the stores, and with the purchase you will know for sure whether this or that aquarium will suit you. But if you do not know exactly the volume of this particular aquarium, it can be calculated by the formula. To do this, multiply the length, depth and height of the aquarium in centimeters. We get the volume in centimeters cubic. This value must be multiplied by 0.001 to get liters. By choosing the right aquarium, you can create a beautiful corner in your own home and ensure a joyful happy life for its inhabitants.

Related videos

Related videos


If you want to achieve perfect accuracy in calculations, it is worth remembering that the proportion of basalt crumb, quartz, river sand is different.

Helpful advice

In the network there are a large number of links to various aquarium calculators online. They allow you to calculate the volume of your aquarium and the weight of the soil necessary for its proper functioning.

What is an aquarium calculator?

Sooner or later, many aquarists visit the idea of ​​replacing their home pond with a more spacious one, or a more interesting and original one. There may be several options here: buy ready-made, order from a professional master or do it yourself. For those who like to experiment and "work with their hands," it is very important to think over everything in advance and calculate that the self-made aquarium will last a long time, and not fall apart in a day, creating a lot of problems for the owner. To help the craftsmen was created aquarium calculator. Let's understand what it is and why it is needed.

Calculator: what is, for what, what are

Calculators are called electronic computing devices, replacing mechanical and performing operations on numbers and algebraic formulas.

Among them are specialized, performing calculations in one very narrow sphere. This is also an aquarium calculator. What can be calculated with it:

  • glass thickness;
  • water volume;
  • soil volume and mass;
  • amount of fertilizer;
  • lighting power;
  • heater power;
  • carbon dioxide content;
  • fish landing density.

There are calculators for rectangular, cubic, angular, panoramic, cylinder aquariums.

Why glass thickness is important for aquarium

This indicator is in the first place for a reason. After determining the dimensions of the aquarium, the next step is to select the glass of the "correct" thickness.

  • Too thin can not be: it will burst, the water will flood the neighbors, and all the fish will die.
  • Too thick does not make sense either: it will make the structure heavier, reduce transparency and “hit the price”, because glass is about a third of the cost of an aquarium.
Yes, and the glasses themselves come in different brands and from various materials (acrylic, silicate, special hot, etc.). And for everyone there is a standard thickness.

How to calculate the thickness of the glass for the aquarium

Usually for making

  • 5-30-liter aquariums take 4mm glass;
  • 30-80-liter - 5 mm;
  • 80-150-liter - 6 mm;
  • 150-220-liter - 8 mm;
  • 220-300-liter - 1 cm.

However, if the aquarium is non-standard (high, narrow, irregular shape), then this rule needs to be amended.

The quality of the glass is also affected. For example, you cannot use old window or display windows. They have sags, blotches of bubbles, fatty film on the surface, and can also be damaged by welding and just age.

If you plan to make an aquarium that looks like a store, then you can simply measure the thickness of the glasses and add 1-2 mm. If there are no analogues in the store, then special formulas for calculating the strength of glasses will help. Required data on the height, width, depth of the aquarium and the strength of the glass.

The disadvantages of these formulas are: any errors lead to strange results, and the tensile strength of the glass is often unknown.

Calculation of glass thickness for aquarium: a table that can help

It is not necessary to create difficulties for yourself from scratch. Experts have long calculated the thickness of the usual glass for the aquarium and tabulated the results in the table. Here is a well-reviewed table with many reviews, you can take note:

Stiffeners and screeds increase the strength of the aquarium. These are strips of glass about 2.5 cm wide, additionally glued from above flat to the front and rear walls, relieving tension and cleaning deflections from them. For long aquariums, they are simply necessary.

It is not necessary to use this particular plate, there are many others, both general and separate for the bottom and walls.

The most "advanced" option is to calculate the thickness of the glasses on an aquarium calculator. This is not only very convenient, but also correct! After all, not all ordinary aquarists can understand the accumulation of complex formulas that go beyond the average knowledge, and even calculate everything on paper, not to mention “in mind”.

The developers note that the calculation is made with substantial reserves. And if suddenly as a result you get zero, then it is recommended to contact the experts with this question.

Aquarium calculator significantly simplifies life - entered the data, pressed the button, got the result! And in conclusion we say: no matter how you use it, do not be lazy to double-check the results, because it is better to spend more time on calculations and checking than on repairs and rework.

How many fish can you keep in an aquarium?

To know the correct answer to this question is no less important than to have information about the care and the creation of optimal conditions for your underwater pets. On the one hand, everyone would like to fill their aquarium with various fish as much as possible; on the other hand, overpopulation cannot be allowed, which is fraught with not only limiting the scope for swimming, but also diseases and death of inhabitants. In this article we will try to figure out how to find a reasonable compromise and not to "overload" your aquarium.

How not to do

It is often found advice to choose the number of fish, starting from the volume or number of liters of tank in which they will live. The following is usually taken as an axiom: for one fish, the optimal amount is 5 liters of water. Accordingly, in a 100-liter aquarium, you can put 20 fish, etc.

Or even more interesting: 1 liter (or gallon) of water should be 1 cm (or inch) the length of the fish. One of the professional aquarists was conducted speculative experiment, which completely refuted the correctness of this formula. He mentally took a 100-liter classic aquarium and began to try on different fish.

  • First, neon (3 cm) - it turned out that 33 pieces will be too small, they will have to look for in such a volume.
  • Then there was a golden fish (10 cm). From ten individuals of this breed there will be so much waste, that it is necessary to “rake them with a shovel”, and even powerful filters will have a hard time dealing with this problem.
  • Further there was an astronotus (25 cm). According to the formula, we can contain four giants in 100 liters, but in real life it is unrealistic to grow even two in such conditions.
  • And finally there was a protopterus (1 m). You can, of course, try to “shove” it into a vessel of a given volume, but will such an existence be comfortable? Unlikely.
So such simplified tips and advice are more harmful than useful. For they absolutely do not take into account neither the size nor the characteristics of specific fish.

And from them, unfortunately, you do not know that schooling fish can be settled in more compact groups, that “loners” need space, and fighting breeds are better kept separate. They do not say anything about repackaging a particular layer of water, and each fish prefers its own layer of water (upper, middle or lower). And about much more. What do you need to consider to make the right calculations?

Factors determining the number of fish in an aquarium

  • Let's start with the physico-chemical parameters of water (acidity, the amount of nitrogen compounds, O2 saturation and temperature).

The most important limiting factor is the content of oxygen in the water. Plants and technical means (as additional sources of this gas) make it possible to increase the density of fish landing.

To determine its limit is simple: if the fish try to spend most of the time near the surface, convulsively swallowing the air (with high-quality aeration!), Then you have overpopulation.

At the same time, it is also necessary to check the temperature of the water, since when it rises, oxygen dissolves worse in water.

  • The next factor is the number, size, weight, age, food activity and growth rate of the fish.

The larger the individual, the more discharge from it. They, as well as food residues, decompose and release toxic ammonia. If there are too many fish, then he simply will not have time to recycle and will poison the aquarium. The permissible number of fish can be identified by conducting chemical tests of water for nitrogen, ammonia, ammonium, nitrite, nitrate and good results by analyzing the results.

  • It is important whether there is soil in the aquarium, what quality it is and in what quantity.
  • Do live plants and what kind they are.
  • Is filtering equipment used and which; how often the aquarium is serviced (water is replaced, the ground is cleaned, etc.).
  • How often and in what quantities the food is given, what quality and chemical composition it has, what percentage of fish they eat. There are other, but not so important factors.

Methods for optimal filling of the aquarium

In aquarism there are several options for determining the optimal filling of the reservoir. The simplest, but also the most controversial is called the rule "3.5 cm by 5 liters of water", where 3.5 cm is the total length of all the fish. Here are your pitfalls:

  • You need to know in advance the final size of an adult.
  • It is necessary to take into account the size and shape of fish. Large full inhabitants produce much more waste, which means they need more water than they are elongated and slender.
  • You need to take into account only the actual amount of water, minus occupied by soil, plants and other accessories, which is a minus about 15 percent.

The basis of the following method is the determination of the surface area of ​​the water. (To find it, you need to multiply the width and length of the aquarium.) The larger it is, the more intense the oxygen exchange and the greater the number of fish that can be planted in a tank. For large fish, a ratio of 3 cm body to 150 cm² of surface is considered optimal, for elongated ones - to 90 cm². The method is especially good for aquariums of complex shape. Although here the calculations are also approximate and you always need to leave a certain margin.

Some more important requirements

  • Use the rule "1 cm by 1 l" only for small, thin, non-aggressive and unpretentious fish.
  • The greater the length and height of the body of the fish, the greater the volume of water she needs. For example, a 20-centimeter discus requires at least 40 liters of water.
  • Thick and slimy fish need more water. For example, a 25 cm goldfish needs at least 30 liters.
  • Small aquariums are only suitable for small fish.
  • The more aggressive the fish, the more volume it needs.
  • Schooling fish is best kept in large aquariums.
  • In a densely planted aquarium with good filtration can live more fish.
  • Select the inhabitants should be so that evenly populate all layers. One can find out who is who by a simplified scheme: the mouth is turned upwards - the upper layer is directed along the middle line - the middle layer, looking down - the bottom rock.

Specific fish - specific liters

Some practicing authors share their experiences and tell which species, in what quantities and aquariums they feel great (with the condition of normal filtration and regular maintenance). Here are some such tips:

  • Small fish (up to 4 cm: neon, cardinal, rasbor, guppy) can be kept in aquariums from 10 liters with a density of landing of 1 l per 1 fish.
  • Small (up to 6 cm: pecillia, ternation, hasemania, rhodostomus, minor, barbus, guppy) in a 20-liter planting density of 1.5 liters per 1 fish.
  • Small peaceful ones (up to 10 cm: swordtail, mollies, congo barbs, cross and black apistogram) in aquariums not less than 150 l. Density 3-10 liters per 1 fish. And for schooling water you need less, and for singles - from 5 liters per piece.
  • Medium peaceful (up to 20 cm: angelfish, golden, gourami, danio malabarian) in an aquarium from 200 l. The rules are hard to call, many exceptions. It all depends on the fish, its mass, behavior, habits. The greater the volume, the more you can increase the density of landing.
  • Small cichlids up to 10 cm need 40 liters for a pair.
  • Malawian cichlids: an aquarium of 150 liters, where 1 fish accounts for no more than 10 liters. Such overpopulation is even necessary, it reduces their aggression.
  • Large fish (up to 30 cm: akara, astronotus, cichlazoma) are placed in a pair of 250 liters or ten in 500 liters.
  • Discus fish need an aquarium of 200 liters and at least 50 liters for 1 fish.
  • Very large ones (arvana, snakeheads, clarium catfish) are best settled in aquariums at least 1.5 m in length. For 500 l 1-2 fish.
  • Soma and fights. They are bottom, they can not be taken into account in the total. The larger the aquarium, the larger the breed can be planted. "Sucker" one, "digging" no more than 5.
  • Labyrinth. One cock will be enough 0.5-2 liters. Gourami - 20 liters per pair.

What can be drawn from all this? And such that the recommendations need to listen, but not blindly follow the rules, the more outdated. Each aquarium is unique and an individual approach is needed.We hope that our information will help you to correctly solve the problem "how many fish can you keep in an aquarium"

How to calculate the volume in liters :: how to calculate the number of liters in the tank :: Natural Sciences

How to calculate the volume in liters

Any liquid container, such as a can or water bottle, has a certain amount that is measured in liters. However, there are cases when the volume is known in cubic meters. In this case, you need to be able to translate meters into liters.

The question "And yet! What appeared first?" Egg or chicken? "" - 12 answers


1. There are several ways to calculate volume in liters. If you encounter a liquid that is packaged in a bottle, then there is always this volume indicated in liters. However, there are containers on which the volume is indicated in cubic meters. From primary school it is known that in 1 m ^ 3 = 1000 l. Accordingly, if you need to find the volume of any capacity in liters, you must multiply the specified value in cubic meters by 1/1000: a (l) = b (m ^ 3) * 0.001. Thus, you can calculate the volume in liters for a given volume, measured in m ^ 3. This is a simple translation from one SI unit of measurement to another. However, if you do not yet know the volume, you will need to first find it in meters, and then translate into liters.

2. Suppose you know only the mass of the liquid in the container. With the help of a simple formula, which is known from the school physics course, one can find the volume. The formula itself looks like this: p = m / V, where m is the mass of the liquid, p is the density of the liquid. You can find the density of the liquid based on the tabular data. In all physics textbooks, the densities of liquids are given, including water, oil, kerosene, mercury, etc. Accordingly, the volume is equal to: V = m / p (m ^ 3). Further, also according to the scheme, V (l) = V (m ^ 3) * 0.001.

3. If you know neither volume nor tare mass, but it is a clear stereometric figure, for example, a cylinder, the volume can be found in two stages: first you need to carry out experimental measurements, and then - algebraic calculations. To do this, you need to measure the radius of the base of the cylindrical container and its height. The volume of such a container will be equal to: V = πR ^ 2 * H, where R is the radius of the base of the container, H is the height (m ^ 3). Similarly, V (l) = V (m ^ 3) * 0.001.

There is an aquarium, and how to determine how many liters it?

Sivolobov Sergey

and you count :))))
V = S * h
S = a * b
in other words - multiply the length and width of the aquarium, and multiply by the height,
if you measure in centimeters - you will receive in cubic centimeters
1 liter = 1 cubic decimeter

Sergey Gaidin

simple ruler. or a similar measuring instrument:
length * width * height = cubic centimeters. see cubic / 1000 = liters
This, of course, if he parallelepiped. if round - then the bottle is easier


You can find out the exact displacement of the accident only after a primer, filter, heater, sprayer, caverns / grooves / grottoes, etc., are placed there. That's when you need to count liters, how much is really included. And already from this volume of water to make a start further at settling by small fishes and plants. For example, I have a volume of a small aquarium according to documents of 23 liters, but in reality I pour about 18 liters of water there. So I should be guided when settling it, not with the volume that goes according to the calculations of width and height, or which is written in the passport, but should assume that I have an 18-liter aquarium. And I have to rely on fish for 18 liters, and in no way will I choke on 23 ...