Dose converter
Cross-family dose conversions (Sv↔Gy↔R) are estimates that depend on radiation type and medium (w_R, µ_en/ρ); conversions within one family are exact. Verify against accredited methods for official decisions.
For photon, gamma and beta radiation 1 rad = 1 rem (radiation weighting factor w_R = 1). Enter a number above — the result is shown for this most common case.
The gray measures absorbed dose, the sievert equivalent dose: Sv = Gy × w_R, where w_R depends on the radiation type. For photons, gamma and beta w_R = 1, for alpha 20, for neutrons 5 to 20. There is no single number — the value above is for photons.
To compute for alpha, neutrons or another standard, open the full dose converter: the radiation type and standard (NRB-99/2009 or ICRP-103) are set explicitly there.
Examples: 1 rad = 1 rem; 10 rad = 10 rem; 100 rad = 100 rem; 1,000 rad = 1,000 rem. Reverse: 1 rem = 1 rad.