Tenth-value layers to half-value layers
Type a value in TVL to get it in HVL instantly.
9.966HVL
That's 1.42× as thick as an X-ray room wall, while a treatment bunker is 1.3× thicker. About 0.1% of the radiation still gets through.
Convert the other way: HVL to TVL
What it means
How much gets stopped?
Thicknesses are for a 1 MeV gamma beam. Half-value layers change with photon energy, so a shield that works for one isotope may not for another.
The math
How to convert TVL to HVL
To convert tenth-value layers to half-value layers, multiply by 3.32193.
Example: 3 TVL × 3.32193 = 9.96578 HVL.
In the other direction, 1 HVL = 0.30103 TVL.
Every unit
Your shielding in every unit
Tables
TVL to HVL conversion table
| TVL | HVL |
|---|---|
| 0.151 TVL | 0.501611 HVL |
| 0.301 TVL | 0.9999 HVL |
| 0.602 TVL | 1.9998 HVL |
| 0.903 TVL | 2.9997 HVL |
| 1.2 TVL | 3.98631 HVL |
| 1.51 TVL | 5.01611 HVL |
| 2.11 TVL | 7.00927 HVL |
| 3.01 TVL | 9.999 HVL |
| 3.91 TVL | 12.9887 HVL |
| 6.02 TVL | 19.998 HVL |
HVL to TVL conversion table
| HVL | TVL |
|---|---|
| 0.5 HVL | 0.150515 TVL |
| 1 HVL | 0.30103 TVL |
| 2 HVL | 0.60206 TVL |
| 3 HVL | 0.90309 TVL |
| 4 HVL | 1.20412 TVL |
| 5 HVL | 1.50515 TVL |
| 7 HVL | 2.10721 TVL |
| 10 HVL | 3.0103 TVL |
| 13 HVL | 3.91339 TVL |
| 20 HVL | 6.0206 TVL |
Quick answers
Quick answers
- How many HVL is 1 TVL?
- 1 TVL is 3.32193 HVL.
- How many HVL is 10 TVL?
- 10 TVL is 33.2193 HVL.
- How many HVL is 3 TVL?
- 3 TVL is 9.96578 HVL.
The units
About these units
Tenth-value layers (TVL)
Each one cuts the beam to a tenth. One TVL is 3.32 HVL.
Half-value layers (HVL)
How many halvings the beam has been through.
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