Density Converter

ConversionEdited by Hemant Kumar and Anjita Rai, founders · How we checkUpdated Free · No sign-up

Quick answer: Choose a starting unit and a target unit, then enter a value. Common conversions: 1 g/cm³ = 62.42796 lb/ft³; 1 kg/m³ = 0.001 g/cm³; 1 kg/m³ = 0.001 kg/L. This converter covers 11 density units.

Use the Density Converter

Density formula and what each symbol means

target = value × (factor of starting unit ÷ factor of target unit), where each factor is the unit value in kg/m³.

Symbols used in the formula
SymbolMeaning
valueThe number you want to convert
factorThe unit’s size expressed in the base unit (kg/m³)

Density examples

g/cm³ to lb/ft³

10 g/cm³ = 624.2796 lb/ft³.

kg/m³ to g/cm³

10 kg/m³ = 0.01 g/cm³.

kg/m³ to kg/L

10 kg/m³ = 0.01 kg/L.

How to calculate Density step by step

  1. Choose the starting unit and the target unit.
  2. Enter your value.
  3. Read the converted value, plus the conversion factor in both directions.

Popular density conversions

How to read your Density result

Water at about 4 °C has a density of roughly 1,000 kg/m³, which is 1 g/cm³ or 1 kg/L. These units are numerically convenient: 1 g/cm³ = 1,000 kg/m³ = 1 kg/L.

UNITSYMBOLEQUALSVALUE OF 1 KG/M³
Kilogram per cubic meterkg/m³1 kg/m³ = 1 kg/m³1 kg/m³
Gram per cubic centimeterg/cm³1 g/cm³ = 1,000 kg/m³0.001 g/cm³
Kilogram per literkg/L1 kg/L = 1,000 kg/m³0.001 kg/L
Gram per milliliterg/mL1 g/mL = 1,000 kg/m³0.001 g/mL
Gram per literg/L1 g/L = 1 kg/m³1 g/L
Tonne per cubic metert/m³1 t/m³ = 1,000 kg/m³0.001 t/m³
Pound per cubic footlb/ft³1 lb/ft³ = 16.018463 kg/m³0.06242796 lb/ft³
Pound per cubic inchlb/in³1 lb/in³ = 27,679.905 kg/m³0.00003612729 lb/in³
Pound per US gallonlb/gal1 lb/gal = 119.82643 kg/m³0.008345404 lb/gal
Ounce per cubic inchoz/in³1 oz/in³ = 1,729.994 kg/m³0.0005780367 oz/in³
Slug per cubic footslug/ft³1 slug/ft³ = 515.37882 kg/m³0.00194032 slug/ft³

Common mistakes when calculating Density

  • Forgetting that 1 g/cm³ equals 1,000 kg/m³, not 100.
  • Using US gallons where imperial gallons are meant in lb/gal.
  • Cubing the length factor incorrectly in imperial conversions.

Density FAQ

What is the density of water?

About 1,000 kg/m³ (1 g/cm³) at roughly 4 °C.

How many kg/m³ are in a g/cm³?

1,000.

How many lb/ft³ are in a g/cm³?

About 62.428 lb/ft³.

What is the base unit for density?

This converter uses kilogram per cubic meter (kg/m³) as the common base unit: every value is first converted to it and then to the target unit.

How do I convert between two density units?

Choose the starting and target units, enter the value and read the result. By hand: convert to the base unit with the table, then divide by the target unit factor.

How many lb/ft³ are in 1 gram per cubic centimeter?

1 g/cm³ = 62.42796 lb/ft³.

How many g/cm³ are in 1 kilogram per cubic meter?

1 kg/m³ = 0.001 g/cm³.

How many kg/L are in 1 kilogram per cubic meter?

1 kg/m³ = 0.001 kg/L.

Which density units does this converter support?

It covers 11 units: kilogram per cubic meter (kg/m³), gram per cubic centimeter (g/cm³), kilogram per liter (kg/L), gram per milliliter (g/mL), gram per liter (g/L), tonne per cubic meter (t/m³), pound per cubic foot (lb/ft³), pound per cubic inch (lb/in³), Pound per US gallon (lb/gal), ounce per cubic inch (oz/in³), slug per cubic foot (slug/ft³).

How accurate is the density converter?

Results are calculated at full double precision and shown to about 8 significant figures. Round the answer to the precision of your original measurement; a result cannot be more accurate than the number you started with.

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Method, review and disclaimer

Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors