Capsule Calculator
Volume and surface area of a cylinder with hemisphere caps. Results update as you type.
Enter dimensions
Results
Enter your dimensions above and the results appear here.
About the Capsule Calculator
The capsule calculator is a free online tool: volume and surface area of a cylinder with hemisphere caps. Enter end radius (r) and cylinder height (h) and the results update instantly, alongside a labelled diagram so you always know which measurement goes where.
Choose your input unit (mm, cm, m, km, in, ft or yd) and optionally show the results in a different one: lengths, areas and volumes are converted correctly. Every answer shows the formula behind it, and the calculation runs in your browser, so nothing is uploaded.
Capsule Calculator example
End radius (r) = 2 cm
Cylinder height (h) = 6 cmVolume = 108.9085 cm³
Surface area = 125.6637 cm²
Overall length = 10 cm
Cylinder part volume = 75.3982 cm³
Caps volume (both) = 33.5103 cm³How to use the Capsule Calculator
- Pick the unit your measurements use. All dimensions must share the same unit.
- Enter end radius (r) and cylinder height (h). Focus a field to highlight the matching label on the diagram.
- Read the results as you type. The largest card is the main answer; the others are the related measurements.
- Copy a single value, copy everything, or share a link that keeps your inputs.
Capsule Calculator FAQ
What formulas does the capsule calculator use?
V = πr²h + ⁴⁄₃πr³; SA = 2πrh + 4πr²; Length = h + 2r.
Can I use different units?
Yes. Pick the input unit and, if you like, a different output unit. Area results are shown in squared units and volumes in cubed units.
Is this capsule calculator free and private?
Yes. It is free with no sign-up, and calculations happen on your device, so your numbers are never sent to a server.
More 3d solids
Cube CalculatorCuboid CalculatorSphere CalculatorHemisphere CalculatorCylinder Calculator