Geometry & Shapes
Cylinder Calculator
Cylinder — it uses volume = πr²h and surface area = 2πr(r + h). This page runs that same calculation on your numbers, in your browser: no signup, no uploads, nothing stored.
Enter your radius and height and Cylinder Calculator works out the volume and surface area with standard volume and surface-area formulas — fast, free and private, with no sign-up or uploads.
About this calculator
It uses volume = πr²h and surface area = 2πr(r + h). It matters whenever a shape has to be measured, cut, covered or compared and the geometry has to be right first. Here is the calculation on real numbers: A cylinder with radius 3 and height 5: volume = π × 3² × 5 = 141.37 . For your own figures, use the calculator above — same method, your inputs, computed on-device.
How to use
- Enter the base radius.
- Enter the height.
- Press Calculate to measure the cylinder.
- Read the volume and the lateral and total surface areas.
Why use Cylinder Calculator
Fast
Calculations run in your browser. No round trip to a server.
Private
Your inputs never leave your device. Nothing is uploaded.
Free
No signup, no paywall, no ads-in-results, no watermarks.
Accurate
Uses standard formulas for quick educational estimates; check critical results before relying on them.
Mobile-ready
Optimised for phones, tablets, and desktops alike.
Transparent
Honest disclaimers wherever browser limits or regional rules apply.
Common uses
Use it when sizing a tank or container
Use it for material-volume estimates
Use it for packaging and box design
Use it when teaching solid geometry
Use it for filling or pouring volumes
Cylinder in engineering and design work
Technical notes
Cylinder Calculator uses volume = πr²h and surface area = 2πr(r + h).
Results assume exact, idealised shapes; real-world measurement error is not included.
All arithmetic runs in your browser using double-precision floating point, so extreme inputs may show tiny rounding differences.
FAQ
How is cylinder volume calculated?
Volume is the base area times the height: πr²h.
What is the difference between lateral and total surface area?
Lateral surface is just the curved side; total surface also adds the two circular ends.
What units should I use?
Use any single length unit consistently; volume comes out in that unit cubed and area in that unit squared.
Does the Cylinder Calculator send my data to a server?
No. The Cylinder Calculator runs entirely in your browser, so nothing you enter is uploaded, stored, or shared.
Worked example
A cylinder with radius 3 and height 5: volume = π × 3² × 5 = 141.37.