Radiation Absorbed Dose / Gy → mGy
Convert Grays to Milligrays
Convert absorbed ionizing-radiation energy per mass in grays and rads. Convert Grays (Gy) to Milligrays (mGy). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Milligrays to Grays →
How to convert grays to milligrays
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 Gy, b for the intermediate value in Gy, and y for the result in mGy.
mGy = Gy ÷ 0.001
Worked examples
10 Gy ≈ 10000 mGy
Step 1: (10 × 1) ≈ 10 Gy.
Step 2: 10 ÷ 0.001 ≈ 10000 mGy.20 Gy ≈ 20000 mGy
Step 1: (20 × 1) ≈ 20 Gy.
Step 2: 20 ÷ 0.001 ≈ 20000 mGy.
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 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.
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.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Grays to milligrays reference table
| Grays (Gy) | Milligrays (mGy) |
|---|---|
| 1 | 1000 |
| 5 | 5000 |
| 10 | 10000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 1000 | 1000000 |
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