Convert Kilowatt-hours per Kilogram to BTU per Pound

Formula

BTU/lb = kWh/kg × 1547.721410146

Derivation from SI units:

• 1 kWh/kg = 3.6 × 10⁶ J/kg.
• 1 BTU_IT/lb = 1055.05585262 J ÷ 0.45359237 kg = 2326 J/kg exactly.
• 1 kWh/kg = 3600000 J/kg ÷ 2326 J/kg per BTU/lb = 1547.721410146 BTU/lb

Both units are defined exactly, so the factor is exact. Kilowatt-hour per Kilogram definition: kilowatt-hour per kilogram; BTU per Pound definition: BTU per pound.

Worked examples

1. A reading of 1 kWh/kg converts to 1547.72141 BTU/lb.
   1 kWh/kg × 1547.72141 = 1547.72141 BTU/lb
2. A value of 12 kWh/kg is 18572.65692 BTU/lb.
   12 kWh/kg × 1547.72141 = 18572.65692 BTU/lb

Where it's used

Kilowatt-hours per Kilogram are used for battery gravimetric energy density, while BTU per pound appear in US steam tables. Both measure specific energy: enthalpy, latent heat and heating value per mass, so the conversion is a fixed factor.

Kilowatt-hour per Kilogram to other specific energy units

Frequently asked questions

Sources

• The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units with special names).
• Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "British thermal unit_IT per pound".

Last reviewed: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.