Input interpretation
hydrogen | nuclear radius
Result
1.2 fm (femtometers)
Unit conversions
1.2×10^-15 meters
4.724×10^-14 inches
Comparisons as radius
≈ 0.43 × classical electron radius ( ≈ 2.8×10^-15 m )
≈ 1.4 × proton root-mean-square charge radius ( ≈ 8.4×10^-16 m )