Radon pCi/L to Bq/m³ Converter

Convert radon readings from US units (pCi/L) into the SI standard becquerels per cubic metre. Enter the measured concentration to see the equivalent value.

Typical action level in picocuries per litre.

For reference only. Follow certified radon testing protocols and mitigation advice in your jurisdiction.

Examples

  • 4.0 pCi/L ⇒ 148.00 Bq/m³.
  • 2.7 pCi/L ⇒ 99.90 Bq/m³.

FAQ

Where does the 37 multiplier come from?

One picocurie equals 0.037 disintegrations per second per litre. Scaling to a cubic metre introduces a factor of 1,000, yielding 37 disintegrations per second — one becquerel.

What is the WHO action level in Bq/m³?

The World Health Organization recommends mitigation above 100 Bq/m³, which corresponds to roughly 2.7 pCi/L.

Can I average multiple readings?

Yes. Average the pCi/L measurements first, then convert the result to Bq/m³ with this calculator.

Does temperature or pressure affect the conversion?

The conversion assumes standard indoor conditions. Extreme temperature or pressure deviations have minimal impact on the relationship between pCi/L and Bq/m³.

Additional Information

  • The conversion uses 1 pCi/L = 37 Bq/m³, the standard factor adopted by the EPA and Health Canada.
  • Bq/m³ is the unit referenced in international building codes and WHO guidelines.
  • To convert back to pCi/L, divide the Bq/m³ result by 37.
  • Use this tool alongside radon mitigation payback calculators to compare readings against regional regulations.

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