Free Density Calculator
Solve for density, mass or volume with common metric and imperial units.
What is the Density Calculator?
Solve for density, mass or volume with common metric and imperial units.
Density is mass divided by volume. The calculator rearranges it to find mass as density times volume, or volume as mass divided by density, after converting units.
Quick, reliable engineering arithmetic saves time on site and in the workshop. These tools show their working so you can check the result.
How to use the Density Calculator
Using the density calculator takes a minute or two. Your entries are saved in this browser, so you can come back later and carry on.
Step 1
Enter your values, choosing the units you are working in.
Step 2
Read the result and the supporting numbers shown beneath it.
Step 3
Check the result against a second method or a reference table before you rely on it.
Tips for better results
Use consistent, correct units, and note density changes with temperature. Specific gravity is density relative to water at about 1,000 kg/m³.
Keep units consistent from start to finish.
These tools are for estimates. Safety critical designs need a qualified engineer.
Privacy and where your data goes
Everything you type into the density calculator stays on your own device. Zapxa does not receive your numbers or documents. If you clear your browser data, your saved entries will be removed, so download a PDF of anything you want to keep.
Frequently asked questions
What is specific gravity?
The ratio of a material's density to that of water, about 1,000 kg/m³. Values above 1 sink in water.
How do I convert g/cm³ to kg/m³?
Multiply by 1,000, so 2.5 g/cm³ is 2,500 kg/m³.
Is the density calculator free?
Yes. It is free to use with no signup, no watermark and no usage limits.
Is my data private?
Yes. Your inputs are processed in your browser and saved only in its local storage. They are not uploaded to our servers.
Does it work on mobile?
Yes. Zapxa works on phones, tablets and desktops. Use the print button or download a PDF to keep a copy.
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