Kilogram per cubic meter to Pound per cubic foot Conversion Table
| Kilogram per cubic meter (kg/m3) | Pound per cubic foot (lb/ft3) | Reference Benchmark | Formula Step |
|---|---|---|---|
| 1.225 kg/m³ | 0.0765 lb/ft³ | Dry atmospheric air at standard temperature and pressure | 1.225 × 0.062428 = 0.0765 lb/ft³ |
| 120 kg/m³ | 7.491 lb/ft³ | Aviation balsa wood lightweight core material | 120 × 0.062428 = 7.491 lb/ft³ |
| 240 kg/m³ | 14.983 lb/ft³ | Natural cork stopper insulation material | 240 × 0.062428 = 14.983 lb/ft³ |
| 534 kg/m³ | 33.337 lb/ft³ | Elemental metallic lithium solid | 534 × 0.062428 = 33.337 lb/ft³ |
| 680 kg/m³ | 42.451 lb/ft³ | Automotive gasoline motor fuel blend | 680 × 0.062428 = 42.451 lb/ft³ |
| 800 kg/m³ | 49.942 lb/ft³ | Industrial denatured ethyl alcohol | 800 × 0.062428 = 49.942 lb/ft³ |
| 917 kg/m³ | 57.246 lb/ft³ | Freshwater ice crystal density at 0°C | 917 × 0.062428 = 57.246 lb/ft³ |
| 998 kg/m³ | 62.303 lb/ft³ | Liquid water density at ambient 20°C | 998 × 0.062428 = 62.303 lb/ft³ |
| 1,000 kg/m³ | 62.428 lb/ft³ | Pure liquid water density baseline at 4°C | 1,000 × 0.062428 = 62.428 lb/ft³ |
| 1,260 kg/m³ | 78.659 lb/ft³ | Pharmaceutical grade vegetable glycerin | 1,260 × 0.062428 = 78.659 lb/ft³ |
| 2,400 kg/m³ | 149.827 lb/ft³ | Standard reinforced structural building concrete | 2,400 × 0.062428 = 149.827 lb/ft³ |
| 2,700 kg/m³ | 168.556 lb/ft³ | Commercial aerospace aluminum alloy 6061 | 2,700 × 0.062428 = 168.556 lb/ft³ |
| 7,850 kg/m³ | 490.06 lb/ft³ | Structural carbon construction steel | 7,850 × 0.062428 = 490.06 lb/ft³ |
| 8,960 kg/m³ | 559.355 lb/ft³ | Pure electrical grade copper cathode | 8,960 × 0.062428 = 559.355 lb/ft³ |
| 11,340 kg/m³ | 707.933 lb/ft³ | Refined elemental lead radiation shield | 11,340 × 0.062428 = 707.933 lb/ft³ |
| 19,320 kg/m³ | 1,206.108 lb/ft³ | Refined 24-karat monetary bullion gold | 19,320 × 0.062428 = 1,206.108 lb/ft³ |
Kilogram per cubic meter to Pound per cubic foot Formula & Unit Definitions
The exact ratio originates from the international yard and pound treaty: 1 pound is legally defined as 0.45359237 kg, and 1 cubic foot equals exactly (0.3048 m)³ = 0.028316846592 m³. Dividing volume by mass yields 0.028316846592 / 0.45359237 ≈ 0.0624279605 lb/ft³ per 1 kg/m³. Therefore, multiplying any density in kg/m³ by 0.0624279605 converts it to lb/ft³.
Quick Estimation: To convert kg/m³ to lb/ft³ mentally, divide by 16 (or multiply by 6 and divide by 100). For example, structural concrete at 2,400 kg/m³ divided by 16 gives exactly 150 lb/ft³.
Kilogram per cubic meter (kg/m3)
Source Unit- Coherent SI base derived density unit (kg·m⁻³) standard throughout international science.
- Measures mass enclosed in a large 1 m × 1 m × 1 m volume space.
- Standard metric baseline where pure liquid water equals 1,000 kg/m³ at 4°C.
Pounds per Cubic Foot (lb/ft³)
Target Unit- Standard imperial density unit in US civil engineering, soil mechanics, and structural design.
- Measures gravitational weight force or mass contained within a 1 cubic foot space.
- Directly determines dead weight of structural concrete, masonry, and foundation backfill.
Frequently Asked Questions
Q.What is the exact formula for kg/m³ to lb/ft³?
Density (lb/ft³) = Density (kg/m³) × 0.0624279605. For the reverse conversion from lb/ft³ to kg/m³, multiply by 16.0184634.
Q.What is the physical difference between Kilogram per cubic meter and Pound per cubic foot?
Kilogram per cubic meter is the coherent SI base derived density unit used worldwide in physics and engineering, while Pound per cubic foot is the standard imperial density unit in US civil building codes.
Q.What is the quick mental rule for converting kg/m³ to lb/ft³?
Divide the kg/m³ value by 16. For example, 1,000 kg/m³ divided by 16 is approximately 62.5 lb/ft³, which is within 0.1% of the exact 62.428 lb/ft³ value.