This converter turns pounds per cubic foot into kilograms per cubic meter instantly, using the exact factor 1 pound per cubic foot = 16.01846337 kilograms per cubic meter. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
The US construction unit for concrete, soil and timber density. The SI unit of density; air is about 1.2 kg/m³.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
pounds per cubic foot- The amount you are converting, measured in pounds per cubic foot
16.01846337- The exact number of kilograms per cubic meter in one pound per cubic foot
kilograms per cubic meter- The converted result
How it works, step by step
- Enter the number of pounds per cubic foot you want to convert.
- The value is multiplied by 16.01846337, the exact conversion factor.
- The result is displayed in kilograms per cubic meter, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 pounds per cubic foot
Multiply 5 by 16.018463. That gives 80.0923 kilograms per cubic meter. A quick sanity check: one pound per cubic foot is larger than one kilogram per cubic meter, so the number should get bigger — and it does.
Converting 72 pounds per cubic foot
72 × 16.018463 = 1,153.33 kilograms per cubic meter. Working backwards, 1,153.33 ÷ 16.018463 returns 72 pounds per cubic foot, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many kilograms per cubic meter are in one pound per cubic foot?
Exactly 16.01846337. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert pounds per cubic foot to kilograms per cubic meter?
Kilograms Per Cubic Meter = pounds per cubic foot × 16.01846337. To reverse it, divide instead: pounds per cubic foot = kilograms per cubic meter ÷ 16.01846337, which is the same as multiplying by 0.06242796058.
Is the pound per cubic foot bigger than the kilogram per cubic meter?
Yes. One pound per cubic foot equals 16.0185 kilograms per cubic meter, so it is the larger unit.
Why does my answer differ slightly from other lb-ft3 to kg-m3 converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a pound per cubic foot?
The US construction unit for concrete, soil and timber density.
What is a kilogram per cubic meter?
The SI unit of density; air is about 1.2 kg/m³.
Pounds Per Cubic Foot to kilograms per cubic meter reference table
| Pounds Per Cubic Foot | Kilograms Per Cubic Meter |
|---|---|
| 0.5 lb/ft³ | 8.0092 kg/m³ |
| 1 lb/ft³ | 16.0185 kg/m³ |
| 2 lb/ft³ | 32.0369 kg/m³ |
| 3 lb/ft³ | 48.0554 kg/m³ |
| 5 lb/ft³ | 80.0923 kg/m³ |
| 10 lb/ft³ | 160.1846 kg/m³ |
| 15 lb/ft³ | 240.277 kg/m³ |
| 20 lb/ft³ | 320.3693 kg/m³ |
| 25 lb/ft³ | 400.4616 kg/m³ |
| 50 lb/ft³ | 800.9232 kg/m³ |
| 75 lb/ft³ | 1,201.38 kg/m³ |
| 100 lb/ft³ | 1,601.85 kg/m³ |
| 250 lb/ft³ | 4,004.62 kg/m³ |
| 500 lb/ft³ | 8,009.23 kg/m³ |
| 1000 lb/ft³ | 16,018.46 kg/m³ |
Exact factor: 1 pound per cubic foot = 16.01846337 kilograms per cubic meter. Values rounded for display.