Becquerels per cubic meter to milli working levels
Type a value in Bq/m³ to get it in mWL instantly.
0.5405mWL
Nothing on our list is smaller: outdoor air is 2.5× higher. Living with that level adds roughly 0.2 mSv of dose a year.
What it means
How much radon is that?
Radon varies hugely with weather, season and ventilation. A single short test can be out by a factor of two, which is why long-term tests are recommended.
The math
How to convert Bq/m³ to mWL
To convert becquerels per cubic meter to milli working levels, multiply by 0.135135.
Example: 4 Bq/m³ × 0.135135 = 0.540541 mWL.
In the other direction, 1 mWL = 7.4 Bq/m³.
Every unit
Your radon level in every unit
Tables
Bq/m³ to mWL conversion table
| Bq/m³ | mWL |
|---|---|
| 10 Bq/m³ | 1.35135 mWL |
| 20 Bq/m³ | 2.7027 mWL |
| 50 Bq/m³ | 6.75676 mWL |
| 100 Bq/m³ | 13.5135 mWL |
| 148 Bq/m³ | 20 mWL |
| 200 Bq/m³ | 27.027 mWL |
| 300 Bq/m³ | 40.5405 mWL |
| 400 Bq/m³ | 54.0541 mWL |
| 600 Bq/m³ | 81.0811 mWL |
| 1,000 Bq/m³ | 135.135 mWL |
| 2,000 Bq/m³ | 270.27 mWL |
mWL to Bq/m³ conversion table
| mWL | Bq/m³ |
|---|---|
| 10 mWL | 74 Bq/m³ |
| 20 mWL | 148 Bq/m³ |
| 50 mWL | 370 Bq/m³ |
| 100 mWL | 740 Bq/m³ |
| 148 mWL | 1,095.2 Bq/m³ |
| 200 mWL | 1,480 Bq/m³ |
| 300 mWL | 2,220 Bq/m³ |
| 400 mWL | 2,960 Bq/m³ |
| 600 mWL | 4,440 Bq/m³ |
| 1,000 mWL | 7,400 Bq/m³ |
| 2,000 mWL | 14,800 Bq/m³ |
Quick answers
Quick answers
- How many mWL is 1 Bq/m³?
- 1 Bq/m³ is 0.135135 mWL.
- How many mWL is 10 Bq/m³?
- 10 Bq/m³ is 1.35135 mWL.
- How many mWL is 4 Bq/m³?
- 4 Bq/m³ is 0.540541 mWL.
The units
About these units
Becquerels per cubic meter (Bq/m³)
The international standard, used across Europe.
Milli working levels (mWL)
A measure of radon’s decay products, used for miners. Converted here with the US EPA’s equilibrium factor of 0.5.
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