# Convert kg to electronvolts?

convert 13.33696^-27 kg to eV

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### 2 Answers

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- RealProLv 71 month agoFavorite Answer
Do you wanna try that again?

A unit of mass useful in particle physics is eV/c^2.

We start with 1 eV = 1.6×10^-19 J

Since 1 kg * c^2 = (3×10^8)^2 J,

J / c^2 = 1 / (3×10^8)^2 kg

1 eV/c^2 = 1.6×10^-19 / (3×10^8)^2 kg

1 eV/c^2 = 1.78×10^-36 kg

1 kg = 5.6095886×10^35 eV/c^2

So multiply by that conversion factor and keep your desired precision.

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Yes 7.48×10^9 eV / c ^ 2 ! Hackers keep deleting half of your answer.

Really,

13.33696×10^-27 kg (5.6095886×10^35 eV/c^2 / kg) = 7481485554 eV/c^2 = 7.48^9 eV/c^2

Unit propagation will help you catch dimensional mistakes you otherwise wouldn't, always do it.