3 ms·You are off by 1000x: 2000 nSv/h * 10 hours = 20 μSv (microsieverts) = 0.02 mSv (millisieverts)by rkwasny 5y agoYou are off by 1000x: 2000 nSv/h * 10 hours = 20 μSv (microsieverts) = 0.02 mSv (millisieverts)