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 Gy = 1 Sv (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 Gy = 1 Sv; 10 Gy = 10 Sv; 100 Gy = 100 Sv; 1,000 Gy = 1,000 Sv. Reverse: 1 Sv = 1 Gy.