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Specific Properties

ft³/lbtoin³/lb

Convert cubic feet per pound (ft³/lb) to cubic inches per pound (in³/lb).

Factor1 ft³/lb = 1728 in³/lb

Converter

ft³/lb

Accepts numbers or expressions, e.g. 150 + 14.7

Result
1728in³/lb

Rendered to 6 significant figures.

Formula

Formula
in³/lb = ft³/lb × 1728

Multiply any value in cubic feet per pound by 1728 to obtain the value in cubic inches per pound.

Worked example

Convert 1 ft³/lb to in³/lb.

  1. 01Start with 1 ft³/lb.
  2. 02Multiply by the conversion factor: 1 × 1728 = 1728 in³/lb.
Result1 ft³/lb = 1728 in³/lb

Conversion table

ft³/lbin³/lb
11728
23456
58640
1017280
2034560
5086400
1001.7280e+5
2003.4560e+5
5008.6400e+5
10001.7280e+6

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from ft³/lb to in³/lb?
1 ft³/lb equals 1728 in³/lb. To convert, multiply the value in cubic feet per pound by 1728.
How do I convert 1 ft³/lb to in³/lb?
1 ft³/lb = 1728 in³/lb. For any value, multiply by 1728.
How do I convert in³/lb back to ft³/lb?
Divide by the same factor — or equivalently, multiply by 0.0005787037. So 1 in³/lb = 0.000578704 ft³/lb.
When would I need to convert cubic foot per pound to cubic inch per pound?
Specific-volume conversions between ft³/lb and in³/lb arise in steam-table lookups, compressible-flow analysis, and thermodynamic state-point work. Specific volume is the reciprocal of density and must not be confused with it — m³/kg and ft³/lb appear directly in property tables and equation-of-state solvers.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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