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In simplest terms, calculating the dose from inhaling radon involves multiplying the average radon level (e.g. in [[Radon: Units of Measure|Bq/m³]]) by the time spent, and the right [[ICRPædia Guide to Dose Coefficients|dose coefficient]].

Using the [[ICRPædia Guide to Dose Coefficients|dose coefficient]] for most circumstances of occupational exposure, breathing air with 50 [[Radon: Units of Measure|Bq/m³]] of radon (a typical worldwide value in buildings) for one year at work (2000 hours) gives an [[Absorbed, Equivalent, and Effective Dose|effective dose]] of 0.7 mSv. For working indoors doing substantial physical activity, or for exposures in tourist caves, the recommended [[ICRPædia Guide to Dose Coefficients|dose coefficient]] is higher, so breathing air with 50 [[Radon: Units of Measure|Bq/m³]] of radon for one year at work gives an [[Absorbed, Equivalent, and Effective Dose|effective dose]] of 1.4 mSv.