Whether you're filling a tank, estimating materials for a pour, or tackling a geometry assignment, the right shape calculator is here. The Sphere Volume Calculator, Cylinder Volume Calculator, and Rectangular Tank Volume Calculator cover everyday needs, while the Pyramid Volume Calculator and Tube Volume Calculator handle less-standard forms.
Browse the most-popular list or open the Trending tab to see what other visitors are working on. Every calculator is free, needs no account, and works on any device.
- Volume Calculator
- Area Calculator
- Perimeter Calculator
- Surface Area Calculator
- Circle Calculator
- Rectangle Calculator
- Triangle Calculator
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Swimming Pool Gallons Calculator for Any Shape (Surface Area × Depth)Estimate the water volume in gallons of a kidney-shaped or irregular swimming pool from its surface area and average depth. Free and instant.
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Tank Volume CalculatorCalculate the volume and capacity of horizontal or vertical cylindrical tanks in cubic meters, liters, and US gallons from diameter and length.
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Volume Conversion CalculatorConvert volume between liters, milliliters, US gallons, quarts, pints, cups, and fluid ounces instantly. Uses US customary units for liquid measures.
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Conical Frustum Volume CalculatorCalculate the volume of a conical frustum with this Conical Frustum Volume Calculator. Input top radius, bottom radius, and height for accurate results. Ideal for geometry and engineering applications.
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Hemisphere Volume CalculatorCalculate hemisphere volume easily with this free online tool. Input the radius to instantly determine the volume of a hemisphere. Accurate results for spherical segments.
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Acre-Feet to Gallons CalculatorConvert acre-feet to US gallons instantly. Enter acre-feet and get the exact gallon volume using 1 acre-foot = 325,851 gallons.
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Cubic Feet Calculator (Volume & Cost for Multiple 3D Shapes)Calculate volume in cubic feet for boxes, rooms, tanks, cylinders, spheres and more. Convert to cubic inches, yards, meters, gallons, liters and total cost.
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Pool Volume CalculatorCalculate the volume of a rectangular swimming pool in US gallons from length, width, and depth. Includes liters, surface area, and average depth.
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Concrete Slab CalculatorCalculate concrete needed for a slab in cubic yards and cubic feet, plus how many 40, 50, 60 or 80 lb bags to buy. Free estimator.
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Liters to Gallons ConverterConvert liters to gallons instantly. Get both US liquid gallons and UK imperial gallons from any volume in liters, with the exact formula shown.
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Paint Volume & Coverage CalculatorCalculate how many gallons of paint you need based on wall area, number of coats, and coverage per gallon. Free, fast paint estimator.
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Engine Displacement Volume CalculatorCalculate total engine displacement from bore, stroke and cylinder count. Get results in cc, liters and cubic inches instantly with this free tool.
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Weight to Volume CalculatorConvert weight (mass) to volume using density. Enter grams, kg, lb or oz plus density to get volume in mL, liters and cm³ instantly.
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Round Pool Volume CalculatorCalculate the water volume of a round (circular) swimming pool in US gallons and cubic feet from its diameter and average depth.
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Raised Garden Bed Soil CalculatorCalculate how much soil you need for a raised garden bed in cubic feet, cubic yards, and number of bags. Enter length, width, and depth.
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Fill Dirt CalculatorCalculate how much fill dirt you need in cubic yards and tons. Enter length, width and depth to estimate volume, weight and cost for your project.
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Rectangular Pool Gallons CalculatorCalculate how many gallons of water your rectangular swimming pool holds using length, width, and average depth. Free, instant pool volume calculator.
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Water Tank Capacity CalculatorCalculate water tank capacity in liters for rectangular or cylindrical tanks. Enter dimensions in meters to get volume, liters and US gallons instantly.
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Shipping Box Volumetric Weight CalculatorCalculate the volumetric (dimensional) weight and volume of a shipping box from its length, width, height and the carrier dimensional divisor (5000, 6000 or 4000).
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Box Volume CalculatorCalculate the volume of a rectangular box from length, width and height. Get results in cubic inches, cubic feet, liters and US gallons instantly.
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Bucket Volume CalculatorCalculate the volume of a tapered bucket from its top diameter, bottom diameter and height. Get results in liters, US gallons and UK gallons instantly.
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Hot Tub Volume CalculatorCalculate how many gallons of water your hot tub holds. Enter the shape and dimensions to estimate volume in gallons, liters and cubic feet.
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Horizontal Cylindrical Tank Volume CalculatorCalculate the liquid volume in a horizontal cylindrical tank for any fill height. Get partial-fill volume, fill %, liters and US gallons instantly.
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Oval (Stadium) Tank Volume CalculatorCalculate the volume of an oval (stadium / capsule cross-section) tank from its width, height and length. Get liters, cm³ and US gallons instantly.
Frequently asked questions
What kinds of volume problems can I solve here?
This collection covers all the common 3-D shapes — spheres, cylinders, pyramids, cubes, rectangular solids, and tanks, among others. Whether you need the capacity of a water tank, the volume of a shipping container, or a geometric solid for a coursework problem, there is a dedicated calculator ready to use.
How accurate are the volume results?
Every calculator uses the standard geometric formula for its shape, tested against known reference values. Results are reliable for most everyday uses, but for construction, manufacturing, or any safety-critical work, verify your figures against the governing standard and have a qualified engineer review the calculations.
Is there a fee, or do I need an account?
No fee and no account — all volume calculators are completely free. Just open the tool, enter your measurements, and get your result instantly. No registration or subscription is required at any point.
Does the site save or share the measurements I enter?
Nothing you enter is stored or transmitted. All calculations run entirely in your browser, so your measurements stay on your device and are never sent to any server or shared with third parties.
Which volume calculators are the most popular?
The list on this page is sorted by actual visitor usage, so the most-used tools appear first. Open the Trending tab to see what is active right now, or check Recently Added for the newest tools in the collection.
