MeV to Ha Converter - Mega Electron Volt to Hartree

Conversion derivation

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

1. 1

   Rewrite MeV in the base unit

   $$1\mathrm{MeV}=1.60217663\times 10^{-13}\mathrm{J}$$
2. 2

   Rewrite Ha in the base unit

   $$1\mathrm{Ha}=4.35974472\times 10^{-18}\mathrm{J}$$
3. 3

   Forward conversion

   $$\begin{array}{rl}1\mathrm{MeV}& =\frac{1.60217663\times 10^{-13}\cancel{\mathrm{J}}}{4.35974472\times 10^{-18}\cancel{\mathrm{J}}}\times 1\mathrm{Ha}\\ & =\frac{1.60217663\times 10^{-13}}{4.35974472\times 10^{-18}}\mathrm{Ha}\\ & =36,749.3221757\mathrm{Ha}\end{array}$$
4. 4

   Reverse conversion

   $$\begin{array}{rl}1\mathrm{Ha}& =\frac{4.35974472\times 10^{-18}\cancel{\mathrm{J}}}{1.60217663\times 10^{-13}\cancel{\mathrm{J}}}\times 1\mathrm{MeV}\\ & =\frac{4.35974472\times 10^{-18}}{1.60217663\times 10^{-13}}\mathrm{MeV}\\ & =0.000027211386\mathrm{MeV}\end{array}$$