MJ to kJ Converter - Megajoule to Kilojoule

Megajoule (MJ) to Kilojoule (kJ)

Direct answer

1 MJ = 1,000 kJ

kJ = MJ × 1,000

Converter

Input

Result

1,000kJ

kJ = MJ × 1,000

MJ = kJ × 0.001

Example: 10 MJ = 10 × 1,000 = 10,000 kJ.

Express both MJ and kJ in the same base unit J (joule), then cancel the shared base unit.

1
Rewrite MJ in the base unit
$1 MJ = 1, 000, 000 J$
2
Rewrite kJ in the base unit
$1 kJ = 1, 000 J$
3
Forward conversion
$1 MJ = \frac{1 , 000 , 000 J}{1 , 000 J} \times 1 kJ = \frac{1 , 000 , 000}{1 , 000} kJ = 1, 000 kJ$
4
Reverse conversion
$1 kJ = \frac{1 , 000 J}{1 , 000 , 000 J} \times 1 MJ = \frac{1 , 000}{1 , 000 , 000} MJ = 0.001 MJ$

A guarded explanation for this pair page covering definition, principle, assumptions, and cautions.

Guarded output

AI text is for interpretation only. The page calculator remains the source of truth for numeric results.

1 MJ = 1,000 kJ.

10 MJ = 10,000 kJ.

100 MJ = 100,000 kJ.

Use kJ = MJ × 1,000.

1 kJ = 0.001 MJ.

Use the conversion factor and round the result to the precision required by your calculation.