Unit Weight Converter (kN/m³, pcf, kgf/m³)
Unit Weight Converter (kN/m³, pcf, kgf/m³): convert between 7 unit weight units, for example 1 lbf/ft³ = 0.1570874638 kN/m³.
From unit
To unit
1 lbf/ft³ = 0.1570874638 kN/m³
| Unit | Value |
|---|---|
| pound-force per cubic foot to newton per cubic metre | 157.0874638 N/m³ |
| pound-force per cubic foot to kilonewton per cubic metre | 0.1570874638 kN/m³ |
| pound-force per cubic foot to kilogram-force per cubic metre | 16.01846337 kgf/m³ |
| pound-force per cubic foot to tonne-force per cubic metre | 0.01601846337 tf/m³ |
| pound-force per cubic foot to gram-force per cubic centimetre | 0.01601846337 gf/cm³ |
| pound-force per cubic foot (lbf/ft³) | 1 lbf/ft³ |
| pound-force per cubic foot to pound-force per cubic inch | 0.0005787037037 lbf/in³ |
Convert unit weight (specific weight γ) between kN/m³, N/m³, pcf (lbf/ft³), kgf/m³, tf/m³ and gf/cm³. 1 pcf = 0.157087 kN/m³, so water at 62.4 pcf is 9.80 kN/m³. Unit weight is density × g.
Typical unit weights
Water 9.81 kN/m³ (62.4 pcf), dry sand 16–18 kN/m³, saturated clay 18–20 kN/m³, plain concrete 24 kN/m³, reinforced concrete 25 kN/m³ (IS 875 Part 1), brick masonry 19–20 kN/m³ and steel 78.5 kN/m³ (490 pcf).
Unit weight is not density
Density ρ is mass per volume (kg/m³); unit weight γ = ρg is weight per volume (kN/m³). A soil of density 1900 kg/m³ has γ = 1900 × 9.81 = 18.64 kN/m³. In gravitational units the numbers match: 1900 kgf/m³.
Unit Weight unit definitions
- kilonewton per cubic metre (kN/m³)
- Kilonewtons per cubic metre are the standard unit of unit weight in soil mechanics and structural design: water 9.81 kN/m³, soils 16–21 kN/m³, plain concrete 24 kN/m³ and reinforced concrete 25 kN/m³ (IS 875 Part 1).
- pound-force per cubic foot (lbf/ft³)
- Pounds-force per cubic foot (pcf) are the US unit of unit weight: water 62.4 pcf, typical soils 100–130 pcf, normal-weight concrete 145–150 pcf and steel 490 pcf.
- newton per cubic metre (N/m³)
- Specific weight, or unit weight, is weight per unit volume, γ = ρg. In SI it is in N/m³: water is 9810 N/m³ and concrete about 24,000 N/m³.
- 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.
- kilogram-force per cubic metre (kgf/m³)
- The kilogram-force per cubic metre is the gravitational unit of unit weight; numerically it equals density in kg/m³, which is why older texts give water as 1000 kgf/m³.
- gram-force per cubic centimetre (gf/cm³)
- The gram-force per cubic centimetre is the CGS gravitational unit of unit weight, numerically equal to specific gravity.
Show 1 more units
- pound-force per cubic inch (lbf/in³)
- Pounds-force per cubic inch suit dense materials: steel is 0.284 lbf/in³ and water 0.0361 lbf/in³.
Popular unit weight conversions
- kilonewton per cubic metre to kilogram-force per cubic metre
- kilonewton per cubic metre to pcf
- tonne-force per cubic metre to kilonewton per cubic metre
- pcf to kilonewton per cubic metre
Show all 42 unit weight conversions
From newtons per cubic metre
- newton per cubic metre to kilonewton per cubic metre
- newton per cubic metre to kilogram-force per cubic metre
- newton per cubic metre to tonne-force per cubic metre
- newton per cubic metre to gram-force per cubic centimetre
- newton per cubic metre to pcf
- newton per cubic metre to pound-force per cubic inch
From kilonewtons per cubic metre
- kilonewton per cubic metre to newton per cubic metre
- kilonewton per cubic metre to kilogram-force per cubic metre
- kilonewton per cubic metre to tonne-force per cubic metre
- kilonewton per cubic metre to gram-force per cubic centimetre
- kilonewton per cubic metre to pcf
- kilonewton per cubic metre to pound-force per cubic inch
From kilograms-force per cubic metre
- kilogram-force per cubic metre to newton per cubic metre
- kilogram-force per cubic metre to kilonewton per cubic metre
- kilogram-force per cubic metre to tonne-force per cubic metre
- kilogram-force per cubic metre to gram-force per cubic centimetre
- kilogram-force per cubic metre to pcf
- kilogram-force per cubic metre to pound-force per cubic inch
From tonnes-force per cubic metre
- tonne-force per cubic metre to newton per cubic metre
- tonne-force per cubic metre to kilonewton per cubic metre
- tonne-force per cubic metre to kilogram-force per cubic metre
- tonne-force per cubic metre to gram-force per cubic centimetre
- tonne-force per cubic metre to pcf
- tonne-force per cubic metre to pound-force per cubic inch
From grams-force per cubic centimetre
- gram-force per cubic centimetre to newton per cubic metre
- gram-force per cubic centimetre to kilonewton per cubic metre
- gram-force per cubic centimetre to kilogram-force per cubic metre
- gram-force per cubic centimetre to tonne-force per cubic metre
- gram-force per cubic centimetre to pcf
- gram-force per cubic centimetre to pound-force per cubic inch
From pounds-force per cubic foot
From pounds-force per cubic inch
- pound-force per cubic inch to newton per cubic metre
- pound-force per cubic inch to kilonewton per cubic metre
- pound-force per cubic inch to kilogram-force per cubic metre
- pound-force per cubic inch to tonne-force per cubic metre
- pound-force per cubic inch to gram-force per cubic centimetre
- pound-force per cubic inch to pcf
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Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures.
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology.
Last reviewed: .