Radiation / Gy/h → mGy/h
Convert Grays per hour to Milligrays per hour
Convert absorbed-dose rates, expressed as energy deposited per mass per time. Convert Grays per hour (Gy/h) to Milligrays per hour (mGy/h). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Milligrays per hour to Grays per hour →
How to convert grays per hour to milligrays per hour
Radiation here means absorbed-dose rate in Gy/s. It is not radioactivity, exposure, or equivalent-dose rate. Sieverts per time require radiation weighting and cannot be equated to grays per time.
Use x for the value in Gy/h, b for the intermediate value in Gy/s, and y for the result in mGy/h.
mGy/h = Gy/h × 0.0002777777777777778 ÷ 2.7777777777777776e-7
Worked examples
10 Gy/h ≈ 10000 mGy/h
Step 1: (10 × 0.000277777777778) ≈ 0.00277777777778 Gy/s.
Step 2: 0.00277777777778 ÷ 2.77777777778e-7 ≈ 10000 mGy/h.20 Gy/h ≈ 20000 mGy/h
Step 1: (20 × 0.000277777777778) ≈ 0.00555555555556 Gy/s.
Step 2: 0.00555555555556 ÷ 2.77777777778e-7 ≈ 20000 mGy/h.
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 per hour
Grays per hour (Gy/h) measures radiation under the conventions above. The base value in Gy/s is (x × 0.000277777777778), where x is the numerical value in Gy/h. Factors shown here are rounded for display; calculations use the stored factor.
About Milligrays per hour
Milligrays per hour (mGy/h) measures radiation under the conventions above. The base value in Gy/s is (x × 2.77777777778e-7), where x is the numerical value in mGy/h. 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 per hour to milligrays per hour reference table
| Grays per hour (Gy/h) | Milligrays per hour (mGy/h) |
|---|---|
| 1 | 1000 |
| 5 | 5000 |
| 10 | 10000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 1000 | 1000000 |
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