Radiation Absorbed Dose / mGy → Gy
Convert Milligrays to Grays
Convert absorbed ionizing-radiation energy per mass in grays and rads. Convert Milligrays (mGy) to Grays (Gy). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Grays to Milligrays →
How to convert milligrays 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 mGy, b for the intermediate value in Gy, and y for the result in Gy.
Gy = mGy × 0.001
Worked examples
10 mGy ≈ 0.01 Gy
Step 1: (10 × 0.001) ≈ 0.01 Gy.
Step 2: 0.01 ÷ 1 ≈ 0.01 Gy.20 mGy ≈ 0.02 Gy
Step 1: (20 × 0.001) ≈ 0.02 Gy.
Step 2: 0.02 ÷ 1 ≈ 0.02 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 Milligrays
Milligrays (mGy) measures radiation absorbed dose under the conventions above. The base value in Gy is (x × 0.001), where x is the numerical value in mGy. 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.
Milligrays to grays reference table
| Milligrays (mGy) | Grays (Gy) |
|---|---|
| 1 | 0.001 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 1000 | 1 |
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