Tonne-force per Cubic Metre (tf/m³)
The tonne-force per cubic metre (often written t/m³) gives unit weight numerically equal to specific gravity: water 1 t/m³, soil about 1.8–2.0 t/m³.
Symbol: tf/m³ (ASCII: tf/m3)
Quantity: specific weight (unit weight) γ = ρg
SI relation: 1 tf/m³ = 9806.65 N/m³ (exact)
Derivation: 1 tf/m³ = 1000 kgf/m³ = 9806.65 N/m³.
Exact: yes, by definition
Same quantity as gram-force per cubic centimetre (gf/cm³) : the factor between them is exactly 1.
Typical uses
- Older Indian soil-mechanics texts
- Geotechnical reports in MKS units
Convert tonnes-force per cubic metre to other units
| Conversion | 1 tf/m³ equals | Reverse |
|---|---|---|
| tonne-force per cubic metre to kilonewton per cubic metre | 9.80665 kN/m³ | kilonewton per cubic metre to tonne-force per cubic metre |
| tonne-force per cubic metre to pcf | 62.42796058 lbf/ft³ | pcf to tonne-force per cubic metre |
| tonne-force per cubic metre to newton per cubic metre | 9806.65 N/m³ | newton per cubic metre to tonne-force per cubic metre |
| tonne-force per cubic metre to kilogram-force per cubic metre | 1000 kgf/m³ | kilogram-force per cubic metre to tonne-force per cubic metre |
| tonne-force per cubic metre to gram-force per cubic centimetre | 1 gf/cm³ | gram-force per cubic centimetre to tonne-force per cubic metre |
| tonne-force per cubic metre to pound-force per cubic inch | 0.036127292 lbf/in³ | pound-force per cubic inch to tonne-force per cubic metre |
Open the Unit Weight Converter (kN/m³, pcf, kgf/m³) to convert any value between all units.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "kilogram-force".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Tonne-force per Cubic Metre (tf/m³). Retrieved October 29, 2026, from https://scientificconverters.com/units/tonne-force-per-cubic-meter/
IEEE
Scientific Converters, "Tonne-force per Cubic Metre (tf/m³)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/units/tonne-force-per-cubic-meter/