Density Calculator – Calculate Mass per Unit Volume
Find the density of any object or substance by entering mass and volume. This calculator converts between units automatically and shows specific gravity for quick comparison with water.
Object Properties
Density Results
Enter mass and volume to calculate density
Common Material Densities
Liquids:
- Water: 1.00 g/cm³
- Seawater: 1.03 g/cm³
- Gasoline: 0.74 g/cm³
- Mercury: 13.5 g/cm³
- Olive oil: 0.92 g/cm³
Solids:
- Aluminum: 2.70 g/cm³
- Steel: 7.85 g/cm³
- Copper: 8.96 g/cm³
- Gold: 19.3 g/cm³
- Wood (oak): 0.75 g/cm³
How to Calculate Density
Measure Mass
Weigh the object using a scale in grams, kilograms, or pounds.
Measure Volume
Find volume by dimensions or water displacement method.
Divide Mass by Volume
Calculator divides mass by volume to get density automatically.
Features
✓Multiple Units
Support for grams, kilograms, pounds, ounces, and various volume units.
✓Specific Gravity
Shows density relative to water for quick float/sink判断.
✓Auto Conversion
Automatically converts all inputs to standard g/cm³ output.
✓Material Category
Classifies result as light, similar to water, or dense material.
Frequently Asked Questions
What is density?
Density measures how much mass is packed into a given volume. It tells you how heavy something is for its size. Water has a density of 1 g/cm³.
Why do some objects float?
Objects with density less than 1 g/cm³ float in water. Objects denser than water sink. This is why wood floats but metal sinks.
How do I find volume of irregular objects?
Use water displacement: submerge the object in a graduated cylinder and measure how much the water level rises. That increase equals the object's volume.
What is specific gravity?
Specific gravity is density relative to water. A specific gravity of 2 means the material is twice as dense as water. It has no units.
Does temperature affect density?
Yes, most materials expand when heated, decreasing density. Water is densest at 4°C. This calculator assumes room temperature conditions.