1 sievert is 1000000000 nanosieverts
1 nanosievert is 1.0E-9 sieverts
As nouns the difference between sievert and nanosievert
is that sievert is in the international system of units, the derived unit of radiation dose; the dose received in one hour at a distance of 1 cm from a point source of 1 mg of radium in a 05 mm thick platinum enclosure symbol: sv while nanosievert is a unit of radiation dose, 10−9 of a sievert.
sievert
Noun
(
en noun)
In the International System of Units, the derived unit of radiation dose; the dose received in one hour at a distance of 1 cm from a point source of 1 mg of radium in a 0.5 mm thick platinum enclosure. Symbol: Sv