Density
Density is calculated by dividing an object's mass by its volume. A material with greater mass in the same space has a higher density.
Science and Measurement Tool
Density Calculator
Calculate density, mass, or volume using flexible measurement units. Enter any two known values, and the calculator will determine the missing value instantly.
Density Calculation Tool
Select what you want to calculate and enter two values.
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Understanding density
What Is Density?
Density describes how much mass is contained within a specific volume. It helps us compare how compact, heavy, or lightweight different materials are.
Mass
Mass represents the amount of matter in an object. Common mass units include kilograms, grams, pounds, and ounces.
Volume
Volume measures the space occupied by an object or substance. It can be measured in cubic meters, liters, milliliters, or cubic feet.
Mass
Density
Volume
Density Calculation Formulas
The formula can be rearranged depending on which value you need to calculate.
Density
Density = Mass ÷ Volume
Mass
Mass = Density × Volume
Volume
Volume = Mass ÷ Density
Simple instructions
How to Use the Density Calculator
The calculator handles unit conversions automatically, so you can use the measurements available to you.
Select a Calculation
Choose whether you want to calculate density, mass, or volume using the buttons at the top of the calculator.
Enter Known Values
Provide the two known measurements and select the correct unit for each value.
Calculate the Result
Select your preferred result unit and press the calculate button to view the answer and useful conversions.
Reference values
Common Material Density Examples
These are approximate values. Actual density may change because of temperature, pressure, purity, and material composition.
| Material | Approximate Density | Equivalent Value |
|---|---|---|
| Air at room temperature | 1.225 kg/m³ | 0.001225 g/cm³ |
| Fresh water | 1,000 kg/m³ | 1 g/cm³ |
| Ice | Approximately 917 kg/m³ | 0.917 g/cm³ |
| Aluminum | Approximately 2,700 kg/m³ | 2.7 g/cm³ |
| Iron | Approximately 7,870 kg/m³ | 7.87 g/cm³ |
| Copper | Approximately 8,960 kg/m³ | 8.96 g/cm³ |
| Gold | Approximately 19,320 kg/m³ | 19.32 g/cm³ |
Frequently asked questions
Density Calculator FAQs
Find answers to common questions about density, units, mass, volume, and calculation accuracy.
Density is calculated using the formula Density = Mass ÷ Volume. For example, an object with a mass of 10 kilograms and a volume of 2 cubic meters has a density of 5 kg/m³.
The SI unit of density is kilograms per cubic meter, written as kg/m³. Grams per cubic centimeter, or g/cm³, is also commonly used.
Multiply density by volume. The formula is Mass = Density × Volume. Make sure the selected units are compatible or use this calculator for automatic conversion.
Divide the mass by the density. The formula is Volume = Mass ÷ Density.
Yes. One milliliter is equal to one cubic centimeter, so 1 g/mL is equal to 1 g/cm³.
Yes. Many materials expand or contract when temperature changes. This affects their volume and can therefore change their density.
Most oils are less dense than water. A less-dense substance generally floats above a denser substance when the two do not mix.