Planet Density Calculator
Result
Calculated result
3.9184620279
Based on the values entered.
↗ Space
Estimate average planetary density from mass and radius relative to Earth.
Formula
Density = 5.514 × Mass ratio ÷ Radius ratio³
- Average density scales with mass divided by radius cubed. Earth’s mean density is taken as about 5.514 g/cm³.
- The main inputs are Mass, Radius. Enter them in the units and format shown in the calculator.
- Use the units, labels and assumptions shown beside each input so the formula is applied consistently.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Planet Density
Inputs
- Mass: 0.107 Earth masses
- Radius: 0.532 Earth radii
Mars-like values of 0.107 Earth masses and 0.532 Earth radii give about 3.92 g/cm³.
Sample result: Calculating…
Frequently asked questions
What does this calculator estimate?
It estimates bulk mean density from mass and radius.
Is this an exact mission-planning tool?
No. It is an educational calculator based on the stated constants and simplified assumptions.
How accurate is the result?
It assumes a spherical body and uses Earth as the reference, which is appropriate for broad astronomical comparison.
What does the Planet Density calculate?
Estimate average planetary density from mass and radius relative to Earth.
Which values should I enter?
Enter Mass, Radius using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Density = 5.514 × Mass ratio ÷ Radius ratio³.