Cylinder Volume Calculator

Last updated: 2026-08-24

Cylinder Volume Calculator — This calculator computes the volume of a cylinder in liters and gallons using radius and height inputs, with an interactive 3D preview.

Inputs

Result

Enter values and press Calculate

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How to Use This Calculator

This cylinder volume calculator gives you fast, accurate results in liters and gallons. It’s perfect for students, engineers, DIY enthusiasts, and anyone needing to measure cylindrical containers. To use it, simply enter the radius and height of your cylinder in centimeters, then click “Calculate”. The interactive 3D preview updates in real time, helping you visualize the shape and dimensions. The result shows volume in both metric (liters) and imperial (US gallons) units. This tool eliminates manual math errors and saves time.

Formula and Methodology

The volume of a cylinder is calculated using the classic geometric formula: V = π × r² × h. Here, r is the radius of the circular base, and h is the height. The result is in cubic centimeters (cm³) because we use cm inputs. To convert to liters, we divide by 1000 (since 1 liter = 1000 cm³). To convert to US gallons, we multiply liters by 0.264172. The calculator handles all these steps automatically, ensuring correct conversions. The same formula works for any cylinder – from a soda can to a water tank – as long as you measure consistently in cm.

Practical Examples

Example 1: A can with radius 3 cm and height 12 cm. Volume = π × 3² × 12 = π × 9 × 12 ≈ 339.29 cm³. That is 0.339 liters (or 0.0896 gallons). Example 2: A large drum with radius 25 cm and height 80 cm. Volume = π × 625 × 80 ≈ 157,080 cm³ = 157.08 liters = 41.5 gallons. Our calculator gives you these numbers instantly. Example 3: A pipe with radius 1.5 cm and height 200 cm (2 meters). Volume = π × 2.25 × 200 ≈ 1,413.72 cm³ = 1.414 liters = 0.373 gallons. Use these examples to check your understanding.

Tips and Best Practices

Always measure the radius (half the diameter) – not the diameter itself. Use the same unit for both dimensions; cm is easiest because the conversion to liters is straightforward (1 liter = 1000 cm³). If you measure in inches, multiply each by 2.54 before entering. For irregular cylinders or partially filled ones, this calculation gives the full capacity. If you need only a portion, multiply the result by the fill fraction. Check the 3D preview to confirm your numbers look reasonable. Remember that our calculator rounds to two decimal places for display, but the internal calculation uses full precision. For scientific work, verify with independent math to avoid rounding errors.

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FAQ

How do I find the volume of a cylinder?

Use the formula V = π × r² × h, where r is the radius and h is the height. Our calculator does this instantly and also converts to liters and gallons.

Can I use inches instead of cm?

Yes, but you must convert to cm first (1 inch = 2.54 cm) or adjust the result. The calculator expects all inputs in centimeters.

What is the difference between liter and gallon?

1 US gallon = 3.78541 liters. The calculator uses US gallons. For imperial gallons, multiply liters by 0.219969.