Grams per cubic centimeter to Pounds per US gallon Calculator

Direct answer

Multiply the entered grams per cubic centimeter value by 8.34540445208178 to express it in pounds per us gallon (lb/US gal). This converts gram per cubic centimeter (g/cm³) to pound per US gallon (lb/US gal) within the documented density family.

Variables and formula

• Grams per cubic centimeter (g/cm³): the source value measured in gram per cubic centimeter.
• Pounds per US gallon (lb/US gal): the same quantity expressed in pound per US gallon.
• Conversion factor: 8.34540445208178 pounds per us gallon per gram per cubic centimeter.

Pounds per US gallon = Grams per cubic centimeter × 8.34540445208178

The generator emits numeric factors with at most 15 significant digits. Calculator results keep up to 10 significant digits for display; this formatting does not increase the precision of the measurement.

Unit definitions and named variants

Source unit: gram per cubic centimeter (g/cm³). Because 1 g = 10^-3 kg and 1 cm³ = 10^-6 m³, 1 g/cm³ = 1000 kg/m³ exactly. Named variant used: Mass density; cubic centimetre denominator. Reference: Bureau International des Poids et Mesures: The International System of Units (SI), 9th edition, version 4.01; National Institute of Standards and Technology: NIST Guide to the SI, Appendix B.8: Factors for Units Listed Alphabetically.

Target unit: pound per US gallon (lb/US gal). This unit uses one avoirdupois pound per U.S. liquid gallon, where 1 U.S. gal = 231 in³ = 0.003785411784 m³ exactly. Named variant used: U.S. liquid gallon only; not the British Imperial gallon. Reference: National Institute of Standards and Technology: NIST Guide to the SI, Appendix B.8: Factors for Units Listed Alphabetically; National Institute of Standards and Technology: NIST Handbook 44 (2026), Appendix C: General Tables of Units of Measurement.

The g/cm³-to-lb/US gal direction remains inside the density quantity; it changes the unit label and numerical scale, not the kind of quantity being measured.

Relationship and precision

This route uses at least one deliberately preserved rounded factor. Treat the displayed factor as an approximation at the precision documented below.

• g/cm³ relationship: The factor follows exactly from SI decimal prefixes.
• lb/US gal relationship: The preserved application factor is truncated relative to the exact-reference quotient 119.8264273168966… kg/m³; this discrepancy is documented rather than silently changing the generator factor.

To audit the factor through the family base unit, divide the raw dataset factors 1000 by 119.826427316. The generator emits that quotient once at 15 significant digits as the canonical direct factor 8.34540445208178; runtime calculations do not divide the already-emitted base factors again.

Reproducible example

For 10 grams per cubic centimeter, 10 × 8.34540445208178 = 83.4540445208178 pounds per us gallon. Repeating the same multiplication with the stated factor reproduces the displayed conversion before interface rounding.

Directional scale check

Because one gram per cubic centimeter contains 8.34540445208178 pounds per us gallon, the target number is larger than the source number for every positive input. Zero maps to zero, while negative inputs are rejected because this family models non-negative magnitudes.

Interpretation

Read the result as pounds per us gallon, not grams per cubic centimeter. A value entered as g/cm³ leaves the calculator labelled lb/US gal; this directional distinction matters even when the two units describe the same density quantity.

Assumptions and limitations

• Only non-negative mass-density magnitudes are accepted by this family.
• Pound per cubic foot uses the avoirdupois pound and international foot, not legacy survey-foot volume.
• Density can vary with temperature, pressure, composition, and measurement method; this converter performs unit scaling only.

Common mistakes

• g/cc is an informal alias for g/cm³.
• lb denotes avoirdupois pound mass, not pound-force.

Continue within the Density family

See the Density conversion hub for its five-unit reference table and all 20 directed routes.

• Reverse the direction: Pounds per US gallon to Grams per cubic centimeter
• Compare another density route: Grams per cubic centimeter to Kilograms per cubic meter
• Compare another density route: Grams per cubic centimeter to Kilograms per liter
• Compare another density route: Grams per cubic centimeter to Pounds per cubic foot
• Compare another density route: Pounds per US gallon to Kilograms per cubic meter

Assumptions

• The entered value uses grams per cubic centimeter exactly as labelled.
• Only non-negative mass-density magnitudes are accepted by this family.
• Rounding and measurement uncertainty remain the user's responsibility.

Sources and methodology

CalcMotive publishes the formula and assumptions so you can decide whether the estimate fits your use case. See our methodology standards.

• The International System of Units (SI), 9th edition, version 4.01; Bureau International des Poids et Mesures; accessed Aug 7, 2026
• NIST Guide to the SI, Appendix B.8: Factors for Units Listed Alphabetically; National Institute of Standards and Technology; accessed Aug 7, 2026
• NIST Handbook 44 (2026), Appendix C: General Tables of Units of Measurement; National Institute of Standards and Technology; accessed Aug 7, 2026