pCi/L to Bq/m³ Converter

Convert radon readings between pCi/L and Bq/m³ instantly. Learn which unit your country uses and what the main guideline levels mean.

Updated October 10, 2026 · 1 min read · By QORVAN Editorial Team · Reviewed by QORVAN Product Team

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Radon is measured in two units. The United States uses picocuries per liter (pCi/L); most other countries use becquerels per cubic meter (Bq/m³). The conversion is fixed: 1 pCi/L = 37 Bq/m³.

Radon level

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Conversion uses 1 pCi/L = 37 Bq/m³.

Common conversions

pCi/L	Bq/m³
1	37
2	74
2.7	100
4	4 pCi/L (148 Bq/m³)
10	370

Which number matters?

Whichever unit you use, the important questions are the same: is your reading above the guideline levels that apply where you live, and how does it change over time? The U.S. EPA action level is 4 pCi/L (148 Bq/m³); the WHO reference level is 100 Bq/m³ (about 2.7 pCi/L).

Check your reading against those levels in the radon level checker, and read what a safe radon level means for the full picture.

Frequently asked questions

How do I convert Bq/m³ to pCi/L?

Divide by 37. For example, 100 Bq/m³ is about 2.7 pCi/L.

Which unit should I use?

Use whichever unit your country’s guidance uses. The United States uses pCi/L; most of Europe and many other countries use Bq/m³. Qorvan Radon S1 can display either.

Sources

A Citizen's Guide to Radon — U.S. EPA
Radon and health (fact sheet) — World Health Organization