kg/m³ to Tonnes per Cubic Meter Converter
Convert kilograms per cubic meter to tonnes per cubic meter — divide by a thousand. Results update as you type; exact factors shown.
One kilogram per cubic meter is 0.001 tonne per cubic meter — see the exact factor, not a rounded rule of thumb.
How the kg/m³ to tonnes per cubic meter converter works
Density converts through kg/m³. 1 g/cm³ = 1 kg/L = 1,000 kg/m³ (water at 4 °C). 1 lb/ft³ = 16.0185 kg/m³ and 1 lb/US gal = 119.83 kg/m³. Concrete is about 2,400 kg/m³, steel 7,850 kg/m³, petrol about 740 kg/m³.
The US uses customary units (US gallon, short ton, °F) in daily life; NIST SP 811 gives the exact SI factors.
Common density conversions
| From | To | Units |
|---|---|---|
| 100 kg/m³ | 0.1 t/m³ | kilogram per cubic meter to tonne per cubic meter |
| 500 kg/m³ | 0.5 t/m³ | kilogram per cubic meter to tonne per cubic meter |
| 917 kg/m³ | 0.917 t/m³ | kilogram per cubic meter to tonne per cubic meter |
| 1,000 kg/m³ | 1 t/m³ | kilogram per cubic meter to tonne per cubic meter |
| 1,025 kg/m³ | 1.025 t/m³ | kilogram per cubic meter to tonne per cubic meter |
| 1,600 kg/m³ | 1.6 t/m³ | kilogram per cubic meter to tonne per cubic meter |
| 2,000 kg/m³ | 2 t/m³ | kilogram per cubic meter to tonne per cubic meter |
| 2,400 kg/m³ | 2.4 t/m³ | kilogram per cubic meter to tonne per cubic meter |
| 2,700 kg/m³ | 2.7 t/m³ | kilogram per cubic meter to tonne per cubic meter |
| 7,850 kg/m³ | 7.85 t/m³ | kilogram per cubic meter to tonne per cubic meter |
| 11,340 kg/m³ | 11.34 t/m³ | kilogram per cubic meter to tonne per cubic meter |
| 19,300 kg/m³ | 19.3 t/m³ | kilogram per cubic meter to tonne per cubic meter |
Units in this converter and their exact factors
| Unit | Symbol | One unit in kilogram per cubic meters |
|---|---|---|
| kilogram per cubic meter | kg/m³ | 1 kilogram per cubic meter |
| gram per cubic centimeter | g/cm³ | 1,000 kilogram per cubic meter |
| gram per milliliter | g/mL | 1,000 kilogram per cubic meter |
| kilogram per liter | kg/L | 1,000 kilogram per cubic meter |
| pound per cubic foot | lb/ft³ | 16.018463374 kilogram per cubic meter |
| pound per cubic inch | lb/in³ | 27,679.9047102 kilogram per cubic meter |
| pound per US gallon | lb/US gal | 119.826427317 kilogram per cubic meter |
| ounce per cubic inch | oz/in³ | 1,729.99404 kilogram per cubic meter |
| tonne per cubic meter | t/m³ | 1,000 kilogram per cubic meter |
FAQFrequently asked questions about density conversion
How many kg/m³ in a t/m³?
Exactly 1,000.
What is 1,000 kg/m³?
One tonne per cubic meter — water.
What is concrete?
2,400 kg/m³, or 2.4 t/m³.
When would I use tonnes per cubic meter?
Bulk materials ordered by volume and weighed by the tonne — gravel, soil, concrete.
What is gravel?
About 1,600 kg/m³ loose, so 1.6 t/m³.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Institute of Standards and Technology (NIST) — United States's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.