Science & lab

Mass Calculator: Density, Volume & Weight

Calculate mass from density and volume. Searchable materials. Volume by shape.

Settings

Material Selection

Select a material to auto-fill density, or enter density manually.

Density (ฯ)

Volume (V)

Results

Select material or enter density and volume

Information hub

The core formula

1 unit volumeร—Density=Resulting mass

Weight on other worlds

Enter density & volume to see weights.

Material quick-facts

Select a material or enter density.

Weight vs mass

Mass (kg, g) is the amount of matterโ€”it stays the same everywhere. Weight (N, lbf) is the force of gravity on that mass. Same mass, different gravity: different weight.

Mass from Density & Volume

Multiply density by volume to get mass. Use the searchable material list to grab a density, or enter your own. You can either type a volume directly or let the calculator derive it from a shapeโ€”cylinder, sphere, cube, or box.

Core Concepts

The Formula

m=ฯร—Vm = \rho \times V. Density (ฯ) is fixed for a material; volume depends on size. Multiply them to get mass.

Material Library

Type to search water, steel, gold, aluminum, and more. Selecting one fills in density. Override it if your value differs.

Volume by Shape

Toggle "Calculate Volume by Shape" to enter dimensions. Cylinder: ฯ€r2h\pi r^2 h. Sphere: 43ฯ€r3\frac{4}{3}\pi r^3. Cube: sideยณ. Box: L ร— W ร— H.

Weight on Earth

Weight = mass ร— g (g โ‰ˆ 9.81 m/sยฒ). Results show Newtons and pound-force so you can compare with scales or lab work.

Mass Calculator: Density, Volume & Weight

Find mass from density and volumeโ€”or from shape dimensions. Searchable materials. Volume formulas for cylinder, sphere, cube, and rectangular prism. Results in kg, g, lb, oz, plus weight in N and lbf. No sign-up.

How to Calculate Mass from Density and Volume

Mass is density times volume: m=ฯร—Vm = \rho \times V. Water at 1000 kg/mยณ in one cubic meter gives 1000 kg of mass. Gold at 19,300 kg/mยณ in the same volume gives 19.3 tonnes. The searchable material library lets you pick water, steel, aluminum, or dozens of others to auto-fill density. You can still edit it. Volume can be entered directly in cmยณ, mยณ, liters, or gallons, or computed from shape dimensions.

Volume by Shape: Cylinder, Sphere, Cube, Prism

Turn on "Calculate Volume by Shape" to enter dimensions instead of volume. Cylinder: V=ฯ€r2hV = \pi r^2 h. Sphere: V=43ฯ€r3V = \frac{4}{3}\pi r^3. Cube: sideยณ. Rectangular prism: length ร— width ร— height. Use meters or centimeters; the calculator converts and multiplies by density to get mass.

Weight vs Mass and Weight on Other Planets

Mass is the amount of matter; weight is the force of gravity on it. On Earth, weight in Newtons is mass ร— 9.81; in pound-force it is roughly mass (kg) ร— 2.2. The same mass has different weights elsewhere: on the Moon about one-sixth of Earth, on Mars about 38%, on Jupiter about 2.5ร—. The Information Hub shows your mass converted to weight (N) on the Moon, Mars, and Jupiter.

Mass Calculator FAQ

How do I calculate mass from density and volume?

Use the formula m=ฯร—Vm = \rho \times V. For water (1000 kg/mยณ) in a 0.5 mยณ container, that's 500 kg. Pick a material from the dropdown to auto-fill density, or type it in yourself.

What is the formula for volume of a cylinder?

Cylinder volume uses V=ฯ€r2hV = \pi r^2 hโ€”radius squared times height. Turn on "Calculate Volume by Shape," choose Cylinder, then plug in r and h. The tool multiplies that by density to get mass.

What is the difference between weight and mass?

Mass is how much matter you have (kg or lb); it stays the same everywhere. Weight is the pull of gravity on that mass. On Earth, a 70 kg person weighs about 687 N or 154 lbf. Same person on the Moon: same mass, but roughly one-sixth the weight.

How do I find the weight on Mars or Jupiter?

Weight = mass ร— local gravity. Mars has about 0.38ร— Earth's g, Jupiter about 2.5ร—. Enter density and volume to get mass, then the Information Hub shows what that mass would "weigh" in Newtons on the Moon, Mars, and Jupiter.

Science & Lab Reference Note

Educational Use: These tools use standard scientific formulas and accepted constants. Results are intended for learning, homework, and general referenceโ€”not for regulated lab work, industrial processes, or clinical applications.

Verification Recommended: Real-world conditions (purity, temperature, pressure, humidity) affect outcomes. For research, manufacturing, or safety-critical work, confirm with a qualified professional or calibrated lab equipment.

Not Professional Advice: This site does not provide chemical, medical, or engineering advice. All calculations run locally in your browser; no data is stored or transmitted.

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