Input interpretation
helium | nuclear radius
Result
1.512 fm (femtometers)
Unit conversions
1.512×10^-15 meters
5.952×10^-14 inches
Comparisons as radius
≈ 0.54 × classical electron radius ( ≈ 2.8×10^-15 m )
≈ 1.8 × proton root-mean-square charge radius ( ≈ 8.4×10^-16 m )