Ha to kJ Converter - Hartree to Kilojoule

Hartree (Ha) to Kilojoule (kJ)

Direct answer

1 Ha = 4.35974472e-21 kJ

kJ = Ha × 4.35974472e-21

Converter

Input

Result

4.35974472e-21kJ

kJ = Ha × 4.35974472e-21

Ha = kJ × 2.29371228e+20

Example: 10 Ha = 10 × 4.35974472e-21 = 4.35974472e-20 kJ.

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

1
Rewrite Ha in the base unit
$1 Ha = 4.35974472 \times 1 0^{- 18} J$
2
Rewrite kJ in the base unit
$1 kJ = 1, 000 J$
3
Forward conversion
$1 Ha = \frac{4.35974472 \times 1 0 ^{- 18} J}{1 , 000 J} \times 1 kJ = \frac{4.35974472 \times 1 0 ^{- 18}}{1 , 000} kJ = 4.35974472 \times 1 0^{- 21} kJ$
4
Reverse conversion
$1 kJ = \frac{1 , 000 J}{4.35974472 \times 1 0 ^{- 18} J} \times 1 Ha = \frac{1 , 000}{4.35974472 \times 1 0 ^{- 18}} Ha = 2.29371228 \times 1 0^{20} Ha$

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Guarded output

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

1 Ha = 4.35974472e-21 kJ.

10 Ha = 4.35974472e-20 kJ.

100 Ha = 4.35974472e-19 kJ.

Use kJ = Ha × 4.35974472e-21.

1 kJ = 2.29371228e+20 Ha.

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