Convert Kilonewtons per Cubic Metre to tf/m³
1 kilonewton per cubic metre (kN/m³) = 0.1019716213 tonnes-force per cubic metre (tf/m³). 1 tf/m³ = 9.80665 kN/m³. Example: 15 kN/m³ = 15 × 0.1019716213 = 1.529574319 tf/m³.
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1 kN/m³ = 0.1019716213 tf/m³
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilonewton per cubic metre to tonne-force per cubic metre converter to paste a column from Excel.
How to Convert Kilonewton per Cubic Metre to Tonne-force per Cubic Metre
- 1 kN/m³ = 0.1019716213 tf/m³
- 1 tf/m³ = 9.80665 kN/m³
- Example: convert 15 kN/m³ to tf/m³: 15 kN/m³ = 15 × 0.1019716213 tf/m³ = 1.529574319 tf/m³
Formula
tf/m³ = kN/m³ × 0.1019716212978
or tf/m³ = kN/m³ ÷ 9.80665
Derivation from SI units:
- 1 kN/m³ = 1000 N/m³.
- 1 tf/m³ = 1000 kgf/m³ = 9806.65 N/m³.
- 1 kN/m³ = 1000 N/m³ ÷ 9806.65 N/m³ per tf/m³ = 0.1019716212978 tf/m³
Both units are defined exactly, so the factor is exact. Kilonewton per Cubic Metre definition: kilonewton per cubic metre; Tonne-force per Cubic Metre definition: tonne-force per cubic metre.
Worked examples
- A reading of 18 kN/m³ converts to 1.835489183 tf/m³.
18 kN/m³ × 0.1019716213 = 1.835489183 tf/m³ - A value of 23 kN/m³ is 2.34534729 tf/m³.
23 kN/m³ × 0.1019716213 = 2.34534729 tf/m³
Kilonewton per Cubic Metre to Tonne-force per Cubic Metre conversion table
| Kilonewtons per Cubic Metre (kN/m³) | Tonnes-force per Cubic Metre (tf/m³) |
|---|---|
| 9.81 kN/m³ | 1.000341605 tf/m³ |
| 10 kN/m³ | 1.019716213 tf/m³ |
| 16 kN/m³ | 1.631545941 tf/m³ |
| 18 kN/m³ | 1.835489183 tf/m³ |
| 19 kN/m³ | 1.937460805 tf/m³ |
| 20 kN/m³ | 2.039432426 tf/m³ |
| 23 kN/m³ | 2.34534729 tf/m³ |
| 24 kN/m³ | 2.447318911 tf/m³ |
| 25 kN/m³ | 2.549290532 tf/m³ |
| 78.5 kN/m³ | 8.004772272 tf/m³ |
Where it's used
Kilonewtons per Cubic Metre are used for soil unit weight in effective-stress and bearing-capacity problems, while tonnes-force per cubic metre appear in older Indian soil-mechanics texts. Both measure specific weight (unit weight) γ = ρg, so the conversion is a fixed factor.
Kilonewton per Cubic Metre to other unit weight units
| Conversion | 1 kN/m³ equals |
|---|---|
| kilonewton per cubic metre to tonne-force per cubic metre | 0.1019716213 tf/m³ |
| kilonewton per cubic metre to pcf | 6.365880354 lbf/ft³ |
| kilonewton per cubic metre to newton per cubic metre | 1000 N/m³ |
| kilonewton per cubic metre to kilogram-force per cubic metre | 101.9716213 kgf/m³ |
| kilonewton per cubic metre to gram-force per cubic centimetre | 0.1019716213 gf/cm³ |
| kilonewton per cubic metre to pound-force per cubic inch | 0.003683958538 lbf/in³ |
Frequently asked questions
How many tonnes-force per cubic metre are in 1 kilonewton per cubic metre?
1 kN/m³ = 0.1019716213 tf/m³.
How do I convert kilonewtons per cubic metre to tonnes-force per cubic metre?
Multiply the value in kN/m³ by 0.1019716213, or divide it by 9.80665. For example, 15 kN/m³ × 0.1019716213 = 1.529574319 tf/m³.
Is the kN/m³ to tf/m³ conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units) and Table 8 (non-SI units accepted for use with the SI).
- 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). Convert Kilonewtons per Cubic Metre to tf/m³. Retrieved October 29, 2026, from https://scientificconverters.com/specific-weight/kilonewtons-per-cubic-meter-to-tonnes-force-per-cubic-meter/
IEEE
Scientific Converters, "Convert Kilonewtons per Cubic Metre to tf/m³," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/specific-weight/kilonewtons-per-cubic-meter-to-tonnes-force-per-cubic-meter/