Density to Mass Calculator

Example data table

These examples help validate your unit choices and inputs.

Formula used

The calculator uses the standard relationship between density, volume, and mass:

• Density is mass per unit volume (for example, kg/m³).
• Volume is the space occupied (for example, m³ or L).
• Quantity multiplies the mass for repeated items.

How to use this calculator

1. Enter the density value for your material.
2. Select the correct density unit from the list.
3. Enter the volume of material you have.
4. Select the volume unit that matches your entry.
5. Choose the output mass unit you want to see.
6. Set quantity if you have multiple identical items.
7. Press Calculate mass to view the result above.
8. Use Download CSV or Download PDF for reporting.

Density to Mass Guide

1) What density tells you

Density measures how much mass fits inside a given volume. Common engineering work uses kg/m³, while lab work often uses g/cm³ or g/mL. Water is about 1000 kg/m³ (1.0 g/mL), steel is near 7850 kg/m³, and typical concrete is around 2400 kg/m³.

2) Core calculation with units

The calculator applies Mass = Density × Volume × Quantity. It converts your chosen density unit to kg/m³ and your chosen volume unit to m³, then multiplies. This avoids mistakes like mixing liters with kg/m³. Finally, it converts the mass into your selected output unit.

3) Useful density ranges

Liquids often fall between 700 and 1200 kg/m³. Gasoline is roughly 720–780 kg/m³, diesel is often 820–900 kg/m³, and seawater is commonly 1020–1030 kg/m³. Metals are denser: aluminum is about 2700 kg/m³ and copper is near 8960 kg/m³.

4) Volume input shortcuts

Choose a unit that matches your measuring tool. Buckets and tanks usually read liters or gallons, shop work may use cubic inches or cubic feet, and CAD volumes are commonly in m³. For reference, 1 L = 0.001 m³, and 1 ft³ ≈ 0.0283168 m³.

5) Multiple items using quantity

If you have repeated parts, set Quantity to scale the mass. For example, one steel block of 0.02 m³ is about 157 kg; ten identical blocks are about 1570 kg. This is convenient for packaging, batching, production planning, and logistics estimates.

6) Rounding and reporting

Use the decimal selector to match your precision. High-level estimates may need 1–2 decimals, while lab measurements may need 4–6. Exporting to CSV keeps a simple record of inputs and outputs, while the PDF export is helpful for sharing calculations with a team.

7) Quick sanity checks

After calculating, compare the “Quick checks” conversions. If the mass in grams looks off by a factor of 1000, the density unit may be wrong. If gallons produce unexpectedly large mass, confirm whether you used US or UK gallons and verify your density source.

8) Where this is used

Density-to-mass conversion is common in civil engineering (concrete pours), manufacturing (raw material orders), chemical processing (tank inventories), and shipping (weight limits). It also helps in education: changing only one input shows how mass scales linearly with density and volume.

FAQs

1) Can I use g/mL and g/cm³ interchangeably?

Yes. 1 mL equals 1 cm³, so g/mL and g/cm³ are numerically the same. Just make sure your material data sheet matches the temperature and mixture you are using.

2) Why does the calculator convert to kg/m³ and m³ first?

Using base units prevents unit-mixing errors. Once density is in kg/m³ and volume is in m³, the product is always kilograms. The calculator then converts that mass to your selected unit.

3) What if my density is given at a different temperature?

Use the density value that matches your temperature. Liquids and gases can change noticeably with temperature, while solids change less. If you only have one value, treat results as an estimate.

4) How do I estimate volume for irregular shapes?

Use displacement (for liquids), 3D model volume (for parts), or break the object into simple shapes and sum volumes. Then enter the total volume with the best-matching unit.

5) Does quantity change the density?

No. Quantity only multiplies the final mass. Density stays the same for identical items made from the same material, assuming consistent composition and no trapped air or void changes.

6) Why is my result different from a scale reading?

Densities vary by grade, moisture, porosity, and temperature. Volume measurements may also be approximate. For accurate work, measure both density and volume under your operating conditions.

7) Can I get mass in pounds or ounces?

Yes. Choose lb or oz in the output unit dropdown. The calculator computes kilograms internally and then converts, so the result stays consistent across all supported units.