Center of Mass Calculator
Enter point masses and coordinates to find their combined center of mass.
Center:
A QUICK WALKTHROUGH
How to use this tool
- Choose 2D or 3D and enter up to 20 point masses.
- Use consistent mass and distance units for every row.
- Calculate the weighted coordinate averages.
Point-mass model
The calculation uses discrete point masses and weighted averages. It does not model continuous bodies or provide engineering safety conclusions.
Valid entries
Enter up to 20 points with a positive finite mass and finite coordinates. The 3D mode uses z coordinates; in 2D, z is not part of the result.
GOOD TO KNOW
Common questions
Can I mix units?
No. Use consistent mass and coordinate units across all rows.
Does this handle a solid object?
No. It calculates discrete point masses, not the center of a continuous body.
Are my values uploaded?
No. The calculation runs locally in your browser.