Formula
I=½mass ×radius² about the cylinder symmetry axis.
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Uniform solid cylinder about its central longitudinal axis. Not a general body/axis solver or an area moment of inertia.
Example Calculation
Example inputs
- Mass: 10 kg
- Cylinder radius: 0.2 m
Mass = 10; Cylinder radius = 0.2. Primary result: 0.2.
Frequently asked questions
How do I use this calculator?
Enter mass, cylinder radius. The result updates automatically. Use Reset to restore the example values.
What method does it use?
I=½mass ×radius² about the cylinder symmetry axis.. Uniform solid cylinder about its central longitudinal axis. Not a general body/axis solver or an area moment of inertia.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.