Super Boring Tools

Search tools

Find a tool by name or what it does.

Density Converter

Convert density between kg/m³, g/cm³, lb/ft³, lb/in³, and more.

Decimal places4
  • Kilograms per cubic metre
    kg/m³
    1,000
  • Grams per cubic centimetre
    g/cm³
    1
  • Grams per millilitre
    g/mL
    1
  • Kilograms per litre
    kg/L
    1
  • Pounds per cubic foot
    lb/ft³
    62.428
  • Pounds per cubic inch
    lb/in³
    0.0361
  • Ounces per US gallon
    oz/gal
    133.5265

How to convert density units

  1. Enter a value

    Type the density amount you want to convert into the value field.

  2. Pick the source unit

    Choose the unit your value is in, such as kg/m³, g/cm³, or lb/ft³.

  3. Read every conversion

    See the equivalent in all other density units update live as you type.

  4. Copy what you need

    Copy a single row or copy all conversions at once with the button below.

Why use this tool

Every unit at once

One value converts to kg/m³, g/cm³, g/mL, kg/L, lb/ft³, lb/in³, and oz per US gallon simultaneously.

Handles tiny and huge values

Results across a wide density range switch to compact scientific notation when they get too large or small to read.

Adjustable precision

Slide the decimal places from 0 to 8 to match the accuracy your work needs.

Copy one or all

Copy any single conversion or grab the whole list in one tap for pasting into notes or a spreadsheet.

Runs entirely on your device

Values are converted locally as you type. Nothing is uploaded or stored.

About this tool

The density converter turns any density value into every other common unit at the same time. Enter a value, pick its unit, and kg/m³, g/cm³, g/mL, kg/L, lb/ft³, lb/in³, and ounces per US gallon all appear together. Density is mass divided by volume, so it tells you how much a material weighs for a given space.

Every unit is defined relative to kilograms per cubic metre, the metric base unit for density. Your input is first converted to kg/m³, then divided into each target unit, so the whole set stays consistent. Grams per cubic centimetre, grams per millilitre, and kilograms per litre are numerically identical and all equal 1000 kg/m³, which is why pure water is about 1 g/cm³ and 1000 kg/m³ at the same time.

This is handy across chemistry, engineering, cooking, and manufacturing, where the same material may be quoted in metric or imperial density. Pounds per cubic foot is common for building materials, while pounds per cubic inch appears for metals. Very small and very large numbers are shown in scientific notation so results stay readable, and you control the number of decimal places.

Negative amounts are rejected and non-numeric input shows a short hint instead of a broken result. For related conversions, try the volume converter, the unit converter, or the energy converter.

Frequently asked questions

What is the density of water?
Pure water at about 4 degrees Celsius has a density near 1000 kg/m³, which equals 1 g/cm³, 1 g/mL, and 1 kg/L. That makes water a convenient reference point.
Why do g/cm³, g/mL, and kg/L show the same number?
Those three units are numerically equal. One cubic centimetre equals one millilitre, and the gram-per-cubic-centimetre and kilogram-per-litre scales line up, so a value like 1 reads the same in all three.
How do I convert lb/ft³ to kg/m³?
Multiply pounds per cubic foot by about 16.018 to get kilograms per cubic metre. This tool does it automatically and shows every other unit at the same time.
Can I convert negative density values?
No. Density here is treated as a magnitude, so negative inputs are rejected with a short hint. Enter zero or a positive number.
Is my input sent anywhere?
No. Every conversion happens on your device as you type. Nothing you enter is uploaded, logged, or stored.

Related tools