Convert Kilograms-force per Cubic Metre to kN/m³

Formula

kN/m³ = kgf/m³ × 0.00980665

or kN/m³ = kgf/m³ ÷ 101.9716212978

Derivation from SI units:

• 1 kgf/m³ = 9.80665 N/m³.
• 1 kN/m³ = 1000 N/m³.
• 1 kgf/m³ = 9.80665 N/m³ ÷ 1000 N/m³ per kN/m³ = 0.00980665 kN/m³

Both units are defined exactly, so the factor is exact. Kilogram-force per Cubic Metre definition: kilogram-force per cubic metre; Kilonewton per Cubic Metre definition: kilonewton per cubic metre.

Worked examples

1. A reading of 1800 kgf/m³ converts to 17.65197 kN/m³.
   1800 kgf/m³ × 0.00980665 = 17.65197 kN/m³
2. A value of 2400 kgf/m³ is 23.53596 kN/m³.
   2400 kgf/m³ × 0.00980665 = 23.53596 kN/m³

Where it's used

Kilograms-force per Cubic Metre are used for older Indian and European design texts, while kilonewtons per cubic metre appear in soil unit weight in effective-stress and bearing-capacity problems. Both measure specific weight (unit weight) γ = ρg, so the conversion is a fixed factor.

Kilogram-force per Cubic Metre to other unit weight units

Frequently asked questions

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".
• 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).

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.