Density Calculator – Mass, Volume And Material Densities
This density calculator brings together several small physics tools into one page. You can calculate density from mass and volume, solve for mass or volume, convert density units, explore typical material densities and estimate the density of real-world objects based on their shape and weight.
Core Density Formulas
Density is defined as mass per unit volume. In symbols:
ρ = m ÷ V
From this relationship, you can rearrange to solve for mass or volume:
- Density ρ = m ÷ V
- Mass m = ρ × V
- Volume V = m ÷ ρ
The calculator uses kilograms and cubic metres internally, then converts to common units such as g/cm³, g/mL, lb/ft³ and lb/gal for convenience.
Using The Mass, Volume And Converter Tabs
The first three tabs are quick solvers for lab work, material ordering or tank sizing. They let you move between mass, volume and density without re-deriving formulas each time. The converter tab lets you translate between unit systems, for example from g/cm³ to kg/m³ or lb/ft³ when comparing datasheets from different regions.
Material Densities And Shape-Based Estimates
The material lookup tab gives typical densities for everyday substances such as water, seawater, metals, concrete, glass and wood. These numbers are approximate but useful when you need a quick estimate or want to sanity-check a measurement.
The shape tab calculates the volume of simple geometries such as cubes, blocks, cylinders and spheres from their dimensions, then combines that with measured mass to estimate density. This is useful when you have a physical sample but no datasheet.
Related Measurement Tools
When you work with density, you often also care about weight, volume and flow rate. You can pair this page with a Weight Converter or a Fuel Cost Calculator when you move from abstract material properties to real-world storage, transport and energy questions.
Density Calculator
Frequently Asked Questions
Clear explanations about density units, material variations, and how temperature and pressure affect density.
Most materials expand slightly when heated and contract when cooled, which changes their volume. Gases are especially sensitive to both temperature and pressure. Since density is mass divided by volume, any change in volume at constant mass changes the density. Reference density tables usually include the conditions under which the values were measured.
A cubic centimetre (cm³) has the same volume as a millilitre (mL). For liquids and many solids, 1 g/cm³ is exactly equal to 1 g/mL. The calculator treats these units as equivalent and shows both values in the converter tab for clarity.
No single density value can represent every alloy, mixture or moisture level. The values in the material lookup tool are rounded averages based on common references. For precise scientific or engineering work, use detailed datasheets or handbooks specific to your material and operating conditions.
Yes. This calculator is ideal for quick calculations in classrooms, labs, workshops and hobby projects. It helps users develop intuition about how mass, volume and density relate while keeping unit conversions consistent and error-free.