Density Converter

Convert density between kg/m³, g/cm³, g/mL, kg/L, lb/ft³, lb/in³, lb/US gal, oz/in³, and slug/ft³ for materials, chemistry, and engineering work.

Share this calculator

Density converter Convert material density between metric, imperial, and reference engineering units for chemistry, materials, and process work.

Common presets

Temperature can change density

Liquids and gases often shift density with temperature and pressure. Use this converter to translate a stated density value, not to predict a new density from changing conditions.

Mass per volume only

This page converts density units only. It does not calculate buoyancy, concentration, mass from volume, or volume from mass.

Enter a density Provide a non-negative density to compare the supported unit systems.

Also in General Science

Concentration Converter PPM to mg/L Converter Solution Concentration Converter

Materials & Fluids

Density converter: kg/m³, g/cm³, lb/ft³, lb/gal, and engineering density units explained

A density converter rewrites the same material density in the unit your laboratory note, engineering table, process sheet, or product data expects. Materials references move between SI and imperial forms frequently, so direct translation helps prevent avoidable reporting errors.

What density measures

Density is mass per unit volume. It tells you how much matter is packed into a given space, which is why it is useful in chemistry, materials science, fluid handling, and quality control.

The quantity does not change when you rewrite it from kg/m³ to g/cm³ or lb/ft³. Only the reporting scale changes.

ρ = m / V

Defines density as mass divided by volume.

1 g/cm³ = 1,000 kg/m³

Links a common laboratory density unit to the SI base form.

1 kg/L = 1 g/mL

Shows the equivalence between common metric liquid-density expressions.

Why conditions matter

Density is not always a fixed constant. Temperature, pressure, salinity, and composition can all change the value, especially for liquids and gases.

That means a converter should only translate the density you already have. It cannot predict how a material density changes when the conditions change.

Density and specific gravity are related, not identical

Specific gravity compares a material density with a reference density, often water. Density itself still needs units such as kg/m³ or lb/ft³.

Use this page to move between density units directly. If a datasheet gives specific gravity instead, convert that reference relationship separately before treating it as a density figure.

Further reading

Frequently asked questions

What is the difference between density and specific gravity?

Density is mass per unit volume and always has units. Specific gravity is a unitless ratio that compares a density with a reference material, often water.

 Why does water density change with temperature?

Temperature changes how closely molecules pack together, which changes mass per unit volume. That is why a stated density value should be tied to the conditions when it matters.

 Is 1 g/mL the same as 1 kg/L?

Yes. Those two metric expressions are equivalent because a millilitre and a cubic centimetre match, and a kilogram is 1,000 grams.

 Can I use this page to calculate mass from volume?

Not by itself. This converter translates density units only. You would still need a separate mass, volume, or buoyancy calculation once the density is in the units you want.

Related

More from nearby categories

These related calculators come from the same leaf category, nearby sibling categories, or the same top-level topic.

Solution Concentration Converter

Convert solution strength between g/L, mg/L, µg/L, kg/L, g/mL, mg/mL, % w/v, and oz/gal for formulation and lab-prep work.

Open calculator

Concentration Converter

Convert dilute-solution concentration between mg/L, g/L, µg/L, ppm, ppb, ppt, and % w/v for lab reporting, water quality, and formulation checks.

Open calculator

PPM to mg/L Converter

Convert ppm and mg/L for dilute aqueous solutions, with related ppb, µg/L, g/L, and percent outputs for water-quality workflows.

Open calculator

Acceleration Converter

Convert signed linear acceleration between m/s², cm/s², mm/s², ft/s², in/s², g, Gal, and km/h/s for engineering, transport, and physics work.

Open calculator

Privacy choices

If you allow analytics, we may use Google Analytics and Microsoft Clarity to better understand how the site is used. Analytics remain off unless you accept.