Convert BTU per Pound to Joules per Kilogram
Instantly convert BTU per Pound (BTU/lb) to Joules per Kilogram (J/kg) with our free online calculator.
Formula: BTU/lb to J/kg — multiply by 2326
Reference Table
| BTU per Pound (BTU/lb) | Joules per Kilogram (J/kg) |
|---|---|
| 1 | 2326 |
| 5 | 11630 |
| 10 | 23260 |
| 25 | 58150 |
| 50 | 116300 |
| 100 | 232600 |
How to Convert BTU per Pound to Joules per Kilogram
Formula
To convert BTU per Pound (BTU/lb) to Joules per Kilogram (J/kg): multiply by 2326
Step-by-Step
- Start with your value in BTU per Pound (BTU/lb).
- Multiply by 2326 to perform the conversion.
- The result is your value expressed in Joules per Kilogram (J/kg).
Conversion Factor
1 BTU/lb = 2326 J/kg
Reverse Factor
1 J/kg = 0.000429923 BTU/lb
Worked Example
Convert 25 BTU per Pound to Joules per Kilogram: 25 BTU/lb = 58150 J/kg
About BTU per Pound (BTU/lb)
An imperial specific-energy unit equal to exactly 2,326 J/kg (1 BTU/lb = 1,055.06 J / 0.45359237 kg = 2,326.000 J/kg). BTU/lb is dominant on US steam tables, HVAC enthalpy/psychrometric calculations per ASHRAE Handbook Fundamentals chapter 1, heating-fuel and refining specific-energy reporting per API MPMS and GPSA Engineering Data Book, and natural-gas heating-value certification. Reference values: natural gas heating value (residential pipeline grade) ~22,000 BTU/lb HHV (higher heating value with water-vapor condensation credit); LNG 21,500 BTU/lb; #2 fuel oil ~19,500 BTU/lb; gasoline 19,500-20,000 BTU/lb LHV; coal anthracite 13,000-15,000 BTU/lb; bituminous 10,500-14,000 BTU/lb per ASTM D388 classification; sub-bituminous 8,500-13,000 BTU/lb; lignite 4,000-8,300 BTU/lb. Saturated liquid water at 70°F: h_f ≈ 38.1 BTU/lb; saturated steam at 14.7 psia: h_g ≈ 1,150.5 BTU/lb. Refrigerant enthalpy/entropy tables in US-edition ASHRAE Handbook and US-customary printings of Mollier h-s diagrams use BTU/lb throughout. Convert BTU/lb to kJ/kg by multiplying by 2.326.
About Joule per Kilogram (J/kg)
The SI unit of specific energy (energy per unit mass) per ISO 80000-5 §5-15 — used for gravimetric energy density of fuels, batteries, explosives, and propellants. J/kg is the universal unit for cross-technology energy-storage comparisons, and the natural unit for kinetic-energy-per-mass (E_k/m = ½v² in J/kg = m²/s²). Reference values for energy-storage media per Sandia National Labs / DOE battery testing protocols and NFPA 921 fire-investigation reference data: lithium-ion 18650 cell ~550,000 J/kg (gravimetric); lithium-iron-phosphate (LFP, LiFePO₄) cells 360,000-450,000 J/kg; lead-acid battery 110,000-180,000 J/kg; gasoline 46,400,000 J/kg lower heating value (LHV) per ASTM D4868; diesel 45,500,000 J/kg LHV; coal (bituminous) ~24,000,000 J/kg; TNT 4,184,000 J/kg (the explosive-yield reference standard, basis of 'megaton' nuclear yield); hydrogen H₂ gas 120,000,000 J/kg LHV (highest gravimetric of any chemical fuel); jet fuel Jet-A 43,150,000 J/kg per ASTM D1655. Specific energy is also the key metric for compressed-air storage (CAES), pumped-hydro per-mass equivalent (gh = 9.81·h J/kg), and projectile kinetic energy per unit mass.
Quick Facts
- 1 BTU per Pound equals 2326 Joules per Kilogram
- 1 Joule per Kilogram equals 0.000429923 BTU per Pound
- BTU per Pound is a unit of specific energy
- Joule per Kilogram is a unit of specific energy
- This conversion is commonly used in fuel comparison, battery technology, and rocket propulsion
- The BTU per Pound belongs to the imperial system
- The Joule per Kilogram belongs to the metric system
Common BTU per Pound to Joule per Kilogram Conversions
| BTU per Pound (BTU/lb) | Joules per Kilogram (J/kg) |
|---|---|
| 0.01 | 23.26 |
| 0.1 | 232.6 |
| 0.25 | 581.5 |
| 0.5 | 1163 |
| 1 | 2326 |
| 2 | 4652 |
| 3 | 6978 |
| 5 | 11630 |
| 10 | 23260 |
| 15 | 34890 |
| 20 | 46520 |
| 25 | 58150 |
| 50 | 116300 |
| 75 | 174450 |
| 100 | 232600 |
| 250 | 581500 |
| 500 | 1163000 |
| 1000 | 2326000 |
| 5000 | 11630000 |
| 10000 | 23260000 |
Understanding BTU per Pound
The BTU per Pound (symbol: BTU/lb) is a unit of specific energy. An imperial specific-energy unit equal to exactly 2,326 J/kg (1 BTU/lb = 1,055.06 J / 0.45359237 kg = 2,326.000 J/kg). BTU/lb is dominant on US steam tables, HVAC enthalpy/psychrometric calculations per ASHRAE Handbook Fundamentals chapter 1, heating-fuel and refining specific-energy reporting per API MPMS and GPSA Engineering Data Book, and natural-gas heating-value certification. Reference values: natural gas heating value (residential pipeline grade) ~22,000 BTU/lb HHV (higher heating value with water-vapor condensation credit); LNG 21,500 BTU/lb; #2 fuel oil ~19,500 BTU/lb; gasoline 19,500-20,000 BTU/lb LHV; coal anthracite 13,000-15,000 BTU/lb; bituminous 10,500-14,000 BTU/lb per ASTM D388 classification; sub-bituminous 8,500-13,000 BTU/lb; lignite 4,000-8,300 BTU/lb. Saturated liquid water at 70°F: h_f ≈ 38.1 BTU/lb; saturated steam at 14.7 psia: h_g ≈ 1,150.5 BTU/lb. Refrigerant enthalpy/entropy tables in US-edition ASHRAE Handbook and US-customary printings of Mollier h-s diagrams use BTU/lb throughout. Convert BTU/lb to kJ/kg by multiplying by 2.326.
It belongs to the imperial measurement system.
BTU per Pound are commonly used in fuel comparison, battery technology, and rocket propulsion.
Understanding Joules per Kilogram
The Joule per Kilogram (symbol: J/kg) is a unit of specific energy. The SI unit of specific energy (energy per unit mass) per ISO 80000-5 §5-15 — used for gravimetric energy density of fuels, batteries, explosives, and propellants. J/kg is the universal unit for cross-technology energy-storage comparisons, and the natural unit for kinetic-energy-per-mass (E_k/m = ½v² in J/kg = m²/s²). Reference values for energy-storage media per Sandia National Labs / DOE battery testing protocols and NFPA 921 fire-investigation reference data: lithium-ion 18650 cell ~550,000 J/kg (gravimetric); lithium-iron-phosphate (LFP, LiFePO₄) cells 360,000-450,000 J/kg; lead-acid battery 110,000-180,000 J/kg; gasoline 46,400,000 J/kg lower heating value (LHV) per ASTM D4868; diesel 45,500,000 J/kg LHV; coal (bituminous) ~24,000,000 J/kg; TNT 4,184,000 J/kg (the explosive-yield reference standard, basis of 'megaton' nuclear yield); hydrogen H₂ gas 120,000,000 J/kg LHV (highest gravimetric of any chemical fuel); jet fuel Jet-A 43,150,000 J/kg per ASTM D1655. Specific energy is also the key metric for compressed-air storage (CAES), pumped-hydro per-mass equivalent (gh = 9.81·h J/kg), and projectile kinetic energy per unit mass.
It belongs to the metric measurement system.
Joules per Kilogram are commonly used in fuel comparison, battery technology, and rocket propulsion.
Why Convert BTU per Pound to Joules per Kilogram?
Converting between BTU per Pound and Joules per Kilogram is a frequent requirement for engineers, scientists, and students working with specific energy values. Different industries and regions favour different unit systems, so having a dependable conversion tool saves time and prevents errors in technical calculations. Whether you are verifying a specification sheet, cross-checking simulation results, or preparing a report for an international audience, accurate specific energy conversion is essential.
Frequently Asked Questions
How do I convert BTU per Pound to Joules per Kilogram?
An imperial specific-energy unit equal to exactly 2,326 J/kg (1 BTU/lb = 1,055. To convert BTU per Pound to Joules per Kilogram, multiply by 2326. For example, 25 BTU/lb equals 58150 J/kg.
How many Joules per Kilogram are in 1 BTU per Pound?
There are 2326 Joules per Kilogram in 1 BTU per Pound.
How many BTU per Pound are in 1 Joule per Kilogram?
There are 0.000429923 BTU per Pound in 1 Joule per Kilogram.
What is the formula for BTU per Pound to Joule per Kilogram conversion?
The formula is: multiply by 2326. This means 1 BTU/lb = 2326 J/kg.
Is a BTU per Pound bigger than a Joule per Kilogram?
No. One BTU per Pound is smaller than one Joule per Kilogram because 1 BTU/lb equals 2326 J/kg, which is greater than 1.
When do you need to convert between BTU per Pound and Joules per Kilogram?
The SI unit of specific energy (energy per unit mass) per ISO 80000-5 §5-15 — used for gravimetric energy density of fuels, batteries, explosives, and propellants. BTU per Pound and Joule per Kilogram are both specific energy units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.