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Density Calculator
Solve D = m ÷ V for density, mass, or volume with unit conversion.
Quick answer
How do you calculate density?
Divide mass by volume. An object with a mass of 200 g and a volume of 50 cm³ has a density of 200 ÷ 50 = 4 g/cm³ (4,000 kg/m³). Since that's more than water (1 g/cm³), it sinks.
D = m ÷ V • m = D × V • V = m ÷ D • 1 g/cm³ = 1,000 kg/m³
⚡ Answer updates as you type · Enter = calculate · Esc = reset
- D = m ÷ V = 200 ÷ 50 = 4 g/cm³
- 1 g/cm³ = 1,000 kg/m³ = 1 g/mL. Water is about 1 g/cm³ — anything denser sinks.
Solve the density formula D = m ÷ V for density, mass, or volume, with steps and kg/m³ conversion.
About this Density Calculator
The Density Calculator solves the density formula D = m ÷ V for density, mass, or volume. Enter the two values you know and get the third with steps, plus density in kg/m³ — perfect for chemistry and physics class.
What you'll need
- • What to find (density, mass, or volume)
- • The other two values
How it works
- 1. Choose what to find.
- 2. Enter the two known values.
- 3. Read the answer and units.
- 4. See the kg/m³ conversion.
- 5. Copy the steps.
Worked example
Aluminum (2.7 g/cm³) block of 10 cm³: mass = 2.7 × 10 = 27 g.
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Density Calculator FAQ
What is the Density Calculator?
The Density Calculator is a free online tool that helps you solve d = m ÷ v for density, mass, or volume with unit conversion.
How do I use the Density Calculator?
Open the Density Calculator, enter the requested values, and review the instant estimate on the page.
Is the Density Calculator free?
Yes. The Density Calculator is free to use on Fast Online Calculator and does not require an account.
What is the density of water?
About 1 g/cm³ (1 g/mL, or 1,000 kg/m³) at 4 °C.
Will it float?
Objects less dense than water (under 1 g/cm³) float; denser ones sink.
What units does density use?
Usually g/cm³ or g/mL in class, and kg/m³ in physics.
How do I find volume of an odd shape?
Use water displacement: the rise in water level in a graduated cylinder is the object's volume.
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