Pounds per US gallon to Kilograms per liter Calculator

Direct answer

Multiply the entered pounds per us gallon value by 0.119826427316 to express it in kilograms per liter (kg/L). This converts pound per US gallon (lb/US gal) to kilogram per liter (kg/L) within the documented density family.

Variables and formula

• Pounds per US gallon (lb/US gal): the source value measured in pound per US gallon.
• Kilograms per liter (kg/L): the same quantity expressed in kilogram per liter.
• Conversion factor: 0.119826427316 kilograms per liter per pound per US gallon.

Kilograms per liter = Pounds per US gallon × 0.119826427316

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: 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.

Target unit: kilogram per liter (kg/L). The litre is exactly one cubic decimetre or 10^-3 m³, so 1 kg/L = 1000 kg/m³ exactly. Named variant used: Mass density using litre volume. 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, Chapter 8: Comments on Some Quantities and Their Units.

The lb/US gal-to-kg/L 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.

• 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.
• kg/L relationship: The litre-to-cubic-metre relationship is exact.

To audit the factor through the family base unit, divide the raw dataset factors 119.826427316 by 1000. The generator emits that quotient once at 15 significant digits as the canonical direct factor 0.119826427316; runtime calculations do not divide the already-emitted base factors again.

Reproducible example

For 10 pounds per us gallon, 10 × 0.119826427316 = 1.19826427316 kilograms per liter. Repeating the same multiplication with the stated factor reproduces the displayed conversion before interface rounding.

Directional scale check

Because one pound per US gallon contains 0.119826427316 kilograms per liter, the target number is smaller 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 kilograms per liter, not pounds per us gallon. A value entered as lb/US gal leaves the calculator labelled kg/L; 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

• An Imperial gallon is larger and produces a different density factor.
• kg/L is mass density, not mass alone.

Continue within the Density family

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

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

Assumptions

• The entered value uses pounds per us gallon 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, Chapter 8: Comments on Some Quantities and Their Units; National Institute of Standards and Technology; 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