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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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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Volume of a Prism CalculatorCalculate the volume of any prism instantly using base area times height (V = B × h). Free, accurate calculator for triangular, rectangular and polygonal prisms.
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Air Volume of a Rectangular Room CalculatorCalculate the air volume of a rectangular room in cubic metres from its length, width and height. Free, instant, and great for HVAC and ventilation sizing.
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Rectangular Raised Garden Bed Soil CalculatorCalculate how much soil to fill a rectangular raised garden bed. Enter length, width and depth to get cubic feet, cubic yards, bags and liters.
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Moles to Gas Volume at STP CalculatorConvert moles of any ideal gas to volume at STP. Uses the molar volume of 22.414 L/mol. Fast, accurate chemistry calculator with worked examples.
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Topsoil Volume for a Rectangular Bed CalculatorCalculate how much topsoil you need for a rectangular garden bed. Enter length, width and depth in metres to get the volume in cubic metres and cubic yards.
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Rectangular Tank Volume in Liters CalculatorCalculate the volume of a rectangular tank in liters from its length, width, and height in centimeters. Also shows cubic cm and US gallons.
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Teaspoons to Milliliters ConverterConvert teaspoons (tsp) to milliliters (mL) instantly. Uses the US teaspoon factor 1 tsp = 4.92892159 mL for accurate cooking and dosing conversions.
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Tablespoons to Milliliters ConverterConvert tablespoons (tbsp) to milliliters (mL) instantly. Uses the US tablespoon = 14.7867648 mL standard. Fast, accurate cooking and recipe conversions.
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Cubic Yards to Cubic Meters CalculatorConvert cubic yards to cubic meters instantly. Enter yd³ to get m³ using the exact factor 1 yd³ = 0.764554858 m³. Fast, accurate volume converter.
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Cubic Meters to Cubic Yards CalculatorConvert cubic meters (m³) to cubic yards (yd³) instantly. Enter any volume in m³ and get the exact yd³ result using the 1.307950619 factor.
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Volume of a Cube CalculatorCalculate the volume of a cube instantly with V = a³. Enter the side length to get volume, surface area, and space diagonal in any units.
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Volume of a Sphere CalculatorCalculate the volume of a sphere from its radius using V = (4/3)·π·r³. Also returns diameter and surface area instantly.
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Volume of a Cylinder CalculatorCalculate the volume of a cylinder instantly using V = π·r²·h. Enter the radius and height to get volume, base area, and total surface area.
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Yards of Concrete for a Slab CalculatorCalculate how many cubic yards of concrete you need for a slab from length, width, and thickness, plus an optional waste allowance.
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Keg Volume CalculatorFind how many beers are in a keg. Enter keg size and serving ounces to get servings, gallons, fluid ounces, and liters instantly.
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Milliliters to Fluid Ounces ConverterConvert milliliters (mL) to US fluid ounces (fl oz) instantly. Enter a volume and get an accurate mL to oz conversion using the 29.5735 factor.
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Fluid Ounces to Milliliters ConverterConvert fluid ounces (fl oz) to milliliters (mL) instantly. Uses 1 US fl oz = 29.5735 mL. Fast, accurate oz to mL conversion for recipes and labels.
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Barrel Volume CalculatorCalculate the volume of a barrel, cask, or drum using the Kepler approximation. Enter height and the middle & end diameters to get liters and gallons.
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Rectangular Aquarium Volume in Gallons CalculatorCalculate the volume of a rectangular aquarium in US gallons from its length, width, and height in inches. Also shows cubic inches and liters.
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Circle to Sphere Volume CalculatorCalculate the volume of a sphere from its radius using V = (4/3)πr³. Also returns diameter and surface area instantly with full precision.
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Concrete Driveway Volume CalculatorCalculate concrete volume in cubic yards and feet for a driveway or slab from length, width and thickness, plus 80 lb and 60 lb bag counts.
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Excavation Volume CalculatorCalculate excavation volume in cubic yards, cubic feet, and cubic meters from length, width, and depth. Free dig volume estimator for trenches and foundations.
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Gravel Tons CalculatorEstimate how many tons of gravel you need from area and depth. Converts cubic yards to US tons using gravel density. Free, fast project calculator.
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.
