Joules to Kilojoules Converter

Convert Energy from Joules to Kilojoules with Precision

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Joules to Kilojoules Calculator

Convert energy values from Joules (J) to Kilojoules (kJ) with high precision.

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Work-Energy Calculator

Calculate work done and energy transfer using force and displacement.

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Understanding Energy Units

The Joule (J)

Key points:

  • SI unit of energy
  • 1 J = 1 N·m
  • Work and energy measure
  • Named after James Prescott Joule
  • Base unit in thermodynamics

The Kilojoule (kJ)

Key features:

  • 1 kJ = 1000 J
  • Common in thermochemistry
  • Used in nutrition labels
  • Heat capacity calculations
  • Industrial energy measures

Applications

Used in:

  • Chemical reactions
  • Food science
  • Mechanical work
  • Electrical energy
  • Thermodynamic processes

Common Values

Reference points:

  • 1 food calorie = 4.184 kJ
  • 1 kWh = 3600 kJ
  • Water heat capacity = 4.184 kJ/kg·K
  • TNT explosion = 4184 kJ/kg

Essential Energy Conversion Formulas

Basic Conversions

1 kJ = 1000 J

1 J = 0.001 kJ

Work and Energy

W = F·d·cos(θ)

E = ½mv²

Related Equations

P = W/t (power)

ΔE = Q - W (first law)