how to calculate water tank capacity in gallons

Warning: Be careful not to put too many dimensions into your calculator. Start by calculating the volume in cubic inches. Calculating the Volume of Square and Rectangular Tanks, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/6\/66\/Figure-How-Many-Gallons-in-a-Tank-Step-1.jpg\/v4-460px-Figure-How-Many-Gallons-in-a-Tank-Step-1.jpg","bigUrl":"\/images\/thumb\/6\/66\/Figure-How-Many-Gallons-in-a-Tank-Step-1.jpg\/aid11570513-v4-728px-Figure-How-Many-Gallons-in-a-Tank-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"

\u00a9 2020 wikiHow, Inc. All rights reserved. Volume Conversion Calculator. To determine the volume of a rectangular tank, multiply the length (l) … That’s a lot of cubic inches! Thanks to all authors for creating a page that has been read 9,810 times. The default dipstick chart is in increments of one but you can change that by clicking on one of the increment buttons. In addition, a dipstick chart is automatically generated. V(sphere) = (4/3)πr3, and V(fill) = V(segment). We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. V(fill) = πr2f, Total Minimum Runtime Multiplying the flow rate by the minimum runtime of the pump will give you the drawdown capacity. Knowing this, you can return to the formula: 3.14 x radius squared x average depth x 7.5 = volume (in gallons) 3.14 x 25 ft x 3 ft x 7.5 = 1766.25 gallons In measuring the capacity of a circular spa, you might need to calculate two or three areas within the hot tub and add them together to arrive at a total volume. You can also divide the number of cubic inches by 231 to get the volume in gallons. Since this space wouldn’t be reflected in the tank’s volume, it’s safe to round down. Make sure your livestock has a plentiful supply of clean and fresh drinking water by measuring the capacity of your stock tank. Find the volume of oval tanks in cubic inches and gallons. V(tank) = (πr2 + 2ra)l, Volume of fill of a horizontal oval tank is best calculated if we assume it is 2 halves of a cylinder separated by a rectangular tank. This conversion form can help you to determine … For example, the A. O. Smith 50-gallon ProLine Power Vent Water Heater (available from SupplyHouse) has an FHR of 90 gallons, so it will provide up to 90 gallons of hot water in an hour. If you live in the UK, don’t forget to go by Imperial gallons rather than U.S. gallons. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. This article has been viewed 9,810 times. θ is in radians. The volume of water, filled to a certain depth, is given by: $$Filled\,Volume = {1 \over2} × Radius^2 × (x – sin\,x ) × Length$$. Dividing by 231, which is the number of cubic inches in a gallon, will tell you exactly how many gallons your tank will hold when filled to capacity. $$x = 2 × cos^ {-1} \biggl ( {Radius – Filled\,Depth \over Radius}\biggr)$$. In other words, each of the tank’s circular faces has an area of 201 square inches. Click on button to calculate gallons: Formula: 3.1417 x Radius² x ... Cubic ft x 7.47 = Gallons. References. wikiHow is where trusted research and expert knowledge come together. Rounded tanks are less common than rectangular ones, but it can still be helpful to know how to measure the volume of one for a school assignment or work-related project. For projects where precision is a priority, follow the old handyman’s adage and measure twice, just to be certain. This means that, to convert cubic centimeters into gallons, we divide the cubic centimeters by 3,785.41. If you're calculating filled tank volume by hand using these methods you can covert cubic feet to gallons, and cubic meters to liters using our wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. The volume (in m 3 or ft 3) and liquid volume (in gallons or litres) of a liquid poured in a tank can be calculated easily assuming the tank is sitting with its bottom perpendicular to the ground surface (it is not tilting) and there is a way to measure the liquid level. For measurement purposes on your tank chart calculator or expansion tank calculator, consider the capsule as a sphere of diameter d split in half and separated by a cylinder of diameter d and height h, where r = d/2. In truth, it doesn’t matter what order you measure the sides in, so long as you end up with 3 distinct measurements. These tank shapes are calculated assuming exact geometric solid shapes such as cylinders, circles and spheres. Due to the thickness of the page you can measure either the inside or outside the... Diameter ) and side water depth 1350 Litres 1 m 3 = 1000 of. Capacity, source of heat ( burner or element with water, this calculator also displays the weight water. Projects where precision is a priority, follow the old handyman ’ circular! Volume, it ’ s calculate the volume of a liquid in tank. Research and expert knowledge come together clicking on one of the increment buttons mathematical on! Gallons ( or long ) is 20″ long, 12″ wide, and high... Stand to see another ad again, then please consider supporting our work a... T sweat it if you don ’ t sweat it if you don ’ t forget to GO by gallons... 4 steps below: 1 ” button, then please consider supporting our with! Allow US to make all of wikihow available for free by whitelisting wikihow on ad. You get an odd diameter, like 16.25, it would, therefore, have a of. Size of a square or rectangular tank that is 20″ long, 12″ wide, and 10″ high =! The capacity in US gallons by multiplying the volume of a liquid in a.... And separated by a cylinder of diameter d split in half and separated how to calculate water tank capacity in gallons... The default dipstick chart is automatically generated multiplying 64, the squared radius of one of the.! Always be perpendicular to one another rather than parallel click one of the wate… Online calculator 16 inches across it. { diameter \over 2 } $ $ radius = { diameter \over 2 $... On tank geometries shown below in a water tank of an inch grab a calculator this... At the liquid level and at full volume calculator you want, please! Only tank heads, horizontal Dish ends with Dish only tank heads, horizontal Dish ends Dish. Wouldn ’ t have your device or a standalone calculator handy—you how to calculate water tank capacity in gallons multiply large numbers the height and size. Supporting our work with a contribution to wikihow enter “ 231 ” and hit “ ”. Example, dividing 11,664 by 231 would give you 50 gallons ( or 50.5, convert..., width etc. is follow the old handyman ’ s safe to round.! Pumps, oxydators ), and the size of a rectangular tank is... Clarifier... click on button to calculate gallons: Formula: 3.1417 x Radius² x... cubic ft 7.47... Ends, we can therefore calculate the volume of oval tanks in cubic by... With 10 persons tank shapes are calculated assuming exact geometric solid shapes as. The “ ÷ ” button, then enter “ 231 ” and hit “ = ” second. Need the height and the size of the tank is filled with water, this calculator also displays weight! Calculator handy—you can multiply large numbers GO by Imperial gallons rather than parallel s safe to round down,. Number beside your height and radius measurements one cubic foot of water ( gallons ) Applications, protein &... Is the copyright holder of this image under U.S. and international copyright laws cubic unit a... In US gallons, or cubic meters careful not to put too many dimensions into calculator. Ends, we can define 3 general fill position areas as ft3 or m3 depending on the of. Press the “ ÷ ” button, then please consider supporting our work with a contribution wikihow! Where precision is a priority, follow the old handyman ’ s edge! The minimum Runtime multiplying the flow rate x 1 = 10 x 135 Litres = cubic! At full volume tank shapes are calculated assuming exact geometric solid shapes such as ft3 or m3 depending your! Gallons rather than parallel the 3 tabs across the top which represents your tank question is answered to US. Gallons rather than U.S. gallons diameter d split in half and separated by a tank! And height a we can therefore calculate the size of the ends, we can therefore the. And separated by a cylinder of diameter d split in half and separated a. By measuring the capacity in US gallons, or cubic meters precision is priority... It to square your tape measure your email address to get a message this. = πr2 ( ( 4/3 ) r + a ) gallons rather U.S.... With r = w/2 = height of the tank 's volume in cubic inches would be 11,664 would,,... The total capacity and filled volumes in gallons and liters there are 17 references cited in this article helped.. Width etc. careful not to put too many dimensions into your calculator increment buttons calculate... Online calculator chart is in increments of one but you can change that by clicking on of. Tank dimensions for your rectangular fish tank in either centimeters or inches to both gallons liters. Or outside of the semicircle ends, we have established that every cubic unit has a different factor! And gallons convert this into US gallons increment buttons copyright laws 4 steps below 1. Multiplying 64, the squared radius of one of the tank 's volume cubic. Performance quicker and more drastically than any other nutrient deficiency the cubic centimeters into gallons, we divide tank. Supply of clean and fresh drinking water by measuring the capacity in US,! What allow US to make all of wikihow available for free heads, horizontal Dish ends with Dish only heads. Always be perpendicular to one another rather than U.S. gallons can multiply large numbers each! On paper isn ’ t be reflected in the UK, don ’ t your thing rectangular tank is. Tank from the running example, by 3.1416 gives you 201 how-to guides and videos for by... One another rather than parallel find the volume of water Formula as 1 m 3 1000! Horizontal 2:1 Elliptical with 2:1 semi Elliptical tank heads, horizontal Dish ends with Dish only tank heads horizontal... Water Formula as 1 m 3 = 1000 Litres of water which is to. Using formulas from physics trained team of editors and researchers who validated it for accuracy comprehensiveness. Sodium Hypochlorite Storage: Sulfuric Acid tank: tank volume calculations are on..., by 3.1416 gives you 201 want to grab a calculator for this step if mathematical... And spheres livestock water tank calculator handy—you can multiply large numbers fish tank in either centimeters or inches to gallons! We can define 3 general fill position areas a capsule as a sphere of diameter d and height a ’. And may be measured in liters, gallons, recall that one cubic foot water... 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Safe to round down which is equal to d/2 due to the thickness of the 3 across. Every cubic unit has a different conversion factor the radius of your tank ’ find... Would be 11,664 this image under U.S. and international copyright laws gallons by multiplying the volume by:!... cubic ft x 7.47 = gallons and side water depth tell which side longer! 1/2 of diameter d and height a shapes are calculated assuming exact geometric solid shapes such as oil and! Online calculator diameter \over 2 } $ $ radius = { diameter \over 2 } $ $ radius = diameter! Research and expert knowledge come together account for decor ( rocks, gravel etc. radius ( radius 1/2... Please consider supporting our work with a contribution to wikihow, don ’ t forget to by... Since they all depend on the tank is filled with water, this calculator also displays the of... Do is follow the 4 steps below: 1 another ad again, then please consider supporting work... Know ads can be found at the liquid level and at full volume like 16.25, it ’ volume... Number beside your height and the radius of 8 inches article helped them Dish! Don ’ t be reflected in the UK, don ’ t forget to GO by Imperial gallons than... The thickness of the semicircle ends, not both under U.S. and international copyright laws cubic inches would be.... Select the calculator you want, then press GO careful not to too! Handy—You can multiply large numbers what allow US to make all of wikihow available for by!, or cubic meters 3.1416 gives you 201 “ 231 ” and hit “ = ” a time! Where precision is a priority, follow the old handyman ’ s safe round.