Radiation Absorbed Dose / rad → Gy
Convert Rads to Grays
Convert absorbed ionizing-radiation energy per mass in grays and rads. Convert Rads (rad) to Grays (Gy). Find the formula, worked examples, unit definitions, and practical guidance below.
How to convert rads to grays
One gray is one joule deposited per kilogram; one rad is 0.01 gray. Equivalent dose in sieverts incorporates radiation weighting and belongs to a separate calculator.
Use x for the value in rad, b for the intermediate value in Gy, and y for the result in Gy.
Gy = rad × 0.01
Worked examples
10 rad ≈ 0.1 Gy
Step 1: (10 × 0.01) ≈ 0.1 Gy.
Step 2: 0.1 ÷ 1 ≈ 0.1 Gy.20 rad ≈ 0.2 Gy
Step 1: (20 × 0.01) ≈ 0.2 Gy.
Step 2: 0.2 ÷ 1 ≈ 0.2 Gy.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Rads
Rads (rad) measures radiation absorbed dose under the conventions above. The base value in Gy is (x × 0.01), where x is the numerical value in rad. Factors shown here are rounded for display; calculations use the stored factor.
About Grays
Grays (Gy) measures radiation absorbed dose under the conventions above. The base value in Gy is (x × 1), where x is the numerical value in Gy. Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Rads to grays reference table
| Rads (rad) | Grays (Gy) |
|---|---|
| 1 | 0.01 |
| 5 | 0.05 |
| 10 | 0.1 |
| 25 | 0.25 |
| 50 | 0.5 |
| 100 | 1 |
| 1000 | 10 |
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