How to Calculate Between kJ/kg and Btu/lbm

The kJ/kg to Btu/lbm and Btu/lbm to kJ/kg Calculator converts between kilojoules per kilogram (kJ/kg) and British Thermal Units per pound mass (Btu/lbm) for specific energy in SI and imperial units. The formulas are:

Where:

• \( kJ/kg \): Kilojoules per kilogram, a SI unit of specific energy.
• \( Btu/lbm \): British Thermal Units per pound mass, an imperial unit of specific energy.

Select the conversion direction, enter the input value, and calculate the result.

Using the kJ/kg and Btu/lbm Mutual Conversion Calculator

This calculator is useful for thermodynamics, energy analysis, or engineering, such as converting specific heat capacities or enthalpies, supporting bidirectional conversions.

Select the direction (kJ/kg to Btu/lbm or Btu/lbm to kJ/kg), input the value. The calculator outputs the converted value.

Example 1: For a specific energy of 1 kJ/kg to Btu/lbm.

1. Direction: kJ/kg to Btu/lbm
2. Input: \( 1 \)
3. Calculation: \( Btu/lbm = 1 \times 0.430 = 0.430 \)
4. Result: \( 0.430 \, \text{Btu/lbm} \)

Example 2: For a value of 1 Btu/lbm to kJ/kg.

1. Direction: Btu/lbm to kJ/kg
2. Input: \( 1 \)
3. Calculation: \( kJ/kg = 1 / 0.430 \approx 2.326 \)
4. Result: \( 2.326 \, \text{kJ/kg} \)

Use this tool for quick bidirectional conversions in engineering analysis.

Common FAQ

Below are frequently asked questions about kJ/kg and Btu/lbm conversions:

• Q: What is kJ/kg?
  A: kJ/kg stands for kilojoules per kilogram, a SI unit of specific energy.
• Q: What is Btu/lbm?
  A: Btu/lbm stands for British Thermal Units per pound mass, an imperial unit of specific energy.
• Q: Is the conversion always 1 kJ/kg = 0.430 Btu/lbm?
  A: Yes, based on standard unit conversions where 1 kJ/kg ≈ 0.430 Btu/lbm.
• Q: How accurate is this calculator?
  A: It provides precise results based on the formulas, rounded to 3 decimal places.
• Q: Can negative values be used?
  A: No, input values must be positive; invalid inputs leave the result blank.