Mass per volume density.
Kilograms per Cubic Meter to Grams per Cubic foot Converter — kg/m3 to g/ft3
Convert Kilogram per Cubic Meter (kg/m3) to Gram per Cubic foot (g/ft3) using the exact conversion factor (1 kilogram per cubic meter = 28.31684659 gram per cubic foot). See the formula, worked examples, conversion table, unit comparison, and common uses.
Kilograms per Cubic Meter to Grams per Cubic foot converter
Converter
Density Converter
Convert thousands of mass-per-volume density combinations for science, engineering, agriculture, and fluids.
Context values
Some unit families need one extra value for a physically accurate result.
Mass per volume density.
Result = input x 1 / 0.03531466672.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Kilograms per Cubic Meter to Grams per Cubic foot
Kilogram per Cubic Meter and Gram per Cubic foot both measure density — mass per unit volume — a property used to identify materials, check manufacturing quality, and predict whether something floats or sinks. As a fixed reference point, water has a density of exactly 1000 kg/m³ (1 g/cm³, 1 g/mL) at its temperature of maximum density, which is why many density figures in science and engineering are quoted relative to water. Kilogram per Cubic Meter is most often used for physics and engineering reference density values.
Formula
grams per cubic foot = kilograms per cubic meter × 28.316846592
This factor comes from each unit's defined relationship to the category's base unit: 1 kilogram per cubic meter equals 1 base unit, and 1 gram per cubic foot equals 0.0353146667215 base units, so dividing one by the other gives the direct kilogram per cubic meter-to-gram per cubic foot factor of 28.316846592.
Simple example
1 kg/m3 × 28.31684659 = 28.31684659 g/ft3
1 kilogram per cubic meter = 28.31684659 grams per cubic foot.
Real-world example
1,000 kg/m3 × 28.31684659 = 28,316.84659 g/ft3
1,000 kilograms per cubic meter = 28,316.84659 grams per cubic foot.
Conversion table
| Kilogram per Cubic Meter (kg/m3) | Gram per Cubic foot (g/ft3) |
|---|---|
| 0.1 kg/m3 | 2.831684659 g/ft3 |
| 1 kg/m3 | 28.31684659 g/ft3 |
| 10 kg/m3 | 283.1684659 g/ft3 |
| 100 kg/m3 | 2,831.684659 g/ft3 |
| 1,000 kg/m3 | 28,316.84659 g/ft3 |
| 10,000 kg/m3 | 283,168.4659 g/ft3 |
Reverse conversion: Gram per Cubic foot to Kilogram per Cubic Meter
28.31684659 g/ft3 × 0.03531466672 = 0.9999999999 kg/m3
28.31684659 grams per cubic foot = 0.9999999999 kilograms per cubic meter.
kilograms per cubic meter = grams per cubic foot × 0.0353146667215
For a page dedicated to this direction, see Gram per Cubic foot to Kilogram per Cubic Meter.
Kilogram per Cubic Meter vs. Gram per Cubic foot
| Aspect | Kilogram per Cubic Meter | Gram per Cubic foot |
|---|---|---|
| Family | SI coherent derived unit | mixed metric/US customary density unit |
| Typical use | Physics and engineering reference density values | Can be used to express the density of low-density materials such as insulation foam, packaging material, or gas concentration by volume — for typical solid or liquid materials, kilograms per cubic meter or pounds per cubic foot are more commonly encountered |
Understanding the Kilogram per Cubic Meter
Kilogram per Cubic Meter (kg/m3) measures density. The SI coherent unit for density — the form all other metric density/concentration units in this catalog are ultimately defined relative to. It is classified as a SI coherent derived unit.
Where it's used: Universal — the official SI unit for density, used throughout physics and engineering worldwide
kg/m³ vs. g/L vs. kg/L. All three are exactly related: 1 kg/m³ = 1 g/L, and 1,000 kg/m³ = 1 kg/L. kg/m³ is the formal SI-coherent form; g/L and kg/L are more commonly used in everyday and laboratory contexts.
Uses of the Kilogram per Cubic Meter today
- Physics and engineering reference density values
- Material property tables in scientific literature
- Fluid dynamics and structural engineering calculations
Understanding the Gram per Cubic foot
Gram per Cubic foot (g/ft3) measures density. A gram is a small mass unit and a cubic foot a comparatively large volume, so this combination naturally suits low-density materials rather than typical solids or liquids. It is classified as a mixed metric/US customary density unit.
Uses of the Gram per Cubic foot today
- Can be used to express the density of low-density materials such as insulation foam, packaging material, or gas concentration by volume — for typical solid or liquid materials, kilograms per cubic meter or pounds per cubic foot are more commonly encountered
Kilogram per Cubic Meter — sources
- BIPM SI Brochure, 9th edition — Kilogram per cubic meter as the SI coherent derived unit for density.
Gram per Cubic foot — sources
- BIPM SI Brochure — Gram and cubic foot as units combinable to express density, though not a standard industry pairing for general materials.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grams per cubic foot are in 1 kilogram per cubic meter?
1 kilogram per cubic meter equals 28.31684659 grams per cubic foot, using the exact defined conversion factor rather than an estimate.
How do I convert kilogram per cubic meter to gram per cubic foot?
Multiply the kilogram per cubic meter value by 28.31684659. The converter above does this instantly to whatever precision you set.
How do I convert gram per cubic foot back to kilogram per cubic meter?
Use the reverse factor: 1 gram per cubic foot equals 0.0353146667 kilograms per cubic meter. You can also use the swap control in the converter above to flip the direction instantly.
What is a kilogram per cubic meter?
Kilogram per Cubic Meter (kg/m3) measures density. The SI coherent unit for density — the form all other metric density/concentration units in this catalog are ultimately defined relative to. It is classified as a SI coherent derived unit.
What is a gram per cubic foot?
Gram per Cubic foot (g/ft3) measures density. A gram is a small mass unit and a cubic foot a comparatively large volume, so this combination naturally suits low-density materials rather than typical solids or liquids. It is classified as a mixed metric/US customary density unit.
Is the kilogram per cubic meter to gram per cubic foot conversion exact?
Yes. Both kilogram per cubic meter and gram per cubic foot are defined by fixed standards rather than physical artifacts, so the factor of 28.31684659 used above is exact to as many digits as you choose to display.
What is the difference between kg/m³ vs. g/l vs. kg/l?
All three are exactly related: 1 kg/m³ = 1 g/L, and 1,000 kg/m³ = 1 kg/L. kg/m³ is the formal SI-coherent form; g/L and kg/L are more commonly used in everyday and laboratory contexts.
Where is the kilogram per cubic meter still used today?
Universal — the official SI unit for density, used throughout physics and engineering worldwide