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Ordinary Compton Wavelength from Rest Mass

Calculate ordinary compton wavelength from rest mass with compatible units, known-value inputs and clearly stated model assumptions.

Formula & worked example
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Calculator inputs

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How to use this calculator

Enter the known values in the units shown. Results update as you type.
Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
Use the worked example to check the method. Reset restores the starting fields.

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Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

For the worked inputs, Compton wavelength is approximately 2.2102191 pm.

λC = h/(mc)

Worked example

Enter these known values and leave the other values blank.

Mass: 0.000602214 u

Compton wavelength: 2.21 pm

Assumptions and limitations

Enter strictly positive rest mass. A massless particle does not have a finite rest-mass Compton wavelength.
This is the ordinary Compton wavelength. The reduced wavelength equals this value divided by 2π.
Numerical arithmetic uses 64 significant digits; displayed values are rounded separately. Captured particle-mass and astronomical unit conversions retain their stated approximations.

Common questions

Which inputs and assumptions does this result use?

Enter strictly positive rest mass. A massless particle does not have a finite rest-mass Compton wavelength.

References

Bookify retains the captured physical relationship and inverse controls, while replacing older or rounded constants with the 2022 CODATA values and full-precision π where applicable. Measured constants retain their physical uncertainty. Bookify requires physically valid mass or nonnegative field/speed magnitudes and principal scattering angles for this stated model.

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