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Convert Pounds per Cubic Inch to Pounds per Cubic Foot

lb/in³ to lb/ft³ · density conversion

lb/in³
lb/ft³
Result
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↔ Convert Pounds per Cubic Foot to Pounds per Cubic Inch instead

What are pounds per cubic inch and pounds per cubic foot?

Pounds per cubic inch is a dense-material unit used for metals and machined parts. Pounds per cubic foot is the imperial density unit used in US construction; water is about 62.4 lb/ft³. For reference: water is 1,000 kg/m³ (1 g/cm³), and steel is about 7,850 kg/m³.

How to convert pounds per cubic inch to pounds per cubic foot

1 lb/in³ = 1,728 lb/ft³. To convert, multiply the number of pounds per cubic inch by 1,728. For example, 5 lb/in³ = 8,640 lb/ft³, and 20 lb/in³ = 34,560 lb/ft³. To go the other way, multiply pounds per cubic foot by 0.000578704 (since 1 lb/ft³ = 0.000578704 lb/in³).

Pounds per Cubic Inch to Pounds per Cubic Foot conversion table

Pounds per Cubic Inch (lb/in³)Pounds per Cubic Foot (lb/ft³)
1 1,728
100 172,800
500 864,000
1,000 1,728,000
2,000 3,456,000
5,000 8,640,000
7,850 13,564,800

FAQ

What is 1 lb/in³ in lb/ft³?

1 lb/in³ = 1,728 lb/ft³. To convert any amount, multiply the number of pounds per cubic inch by 1,728.

How do I convert pounds per cubic foot back to pounds per cubic inch?

Go the other way: 1 lb/ft³ = 0.000578704 lb/in³, so multiply pounds per cubic foot by 0.000578704 to get pounds per cubic inch.

Is a pounds per cubic inch bigger than a pounds per cubic foot?

Yes — 1 lb/in³ is the larger unit, equal to 1,728 lb/ft³.

Are these density conversions exact?

They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.

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