Free Radon Tools
Quick, private calculators to help you understand a radon reading. Nothing you type leaves your browser.
Most Used
Radon Test Result Checker
Enter your radon test result to see how it compares with EPA and WHO guidance and how much reduction would bring it below 1.0 pCi/L.
Open the Result CheckerRadon Unit Converter (pCi/L ↔ Bq/m³)
Convert radon readings between US units (pCi/L) and international units (Bq/m³) used by WHO and many digital monitors.
Open the Unit ConverterWant the Full Picture?
Our guides explain what your number means and what to do about it.