Convert Kilograys to Milligrays (kGy to mGy)
1 kilogray (kGy) = 1000000 milligrays (mGy). 1 mGy = 0.000001 kGy. Example: 15 kGy = 15 × 1000000 = 15000000 mGy.
Also searched as kilograys to mGy, kilograys in mGy, kilograys into milligrays, kGy to mGy, kGy in milligrays, kGy into milligray, kilogray to milligray, kGy to milligrays converter and how many milligrays in a kilogray.
1 kGy = 1000000 mGy
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilogray to milligray converter to paste a column from Excel.
How to Convert Kilogray to Milligray
- 1 kGy = 1000000 mGy
- 1 mGy = 0.000001 kGy
- Example: convert 15 kGy to mGy: 15 kGy = 15 × 1000000 mGy = 15000000 mGy
Formula
mGy = kGy × 1000000
Derivation from SI units:
- 1 kGy = 10³ Gy.
- 1 mGy = 10⁻³ Gy.
- 1 kGy = 1000 Gy ÷ 0.001 Gy per mGy = 1000000 mGy
Both units are defined exactly, so the factor is exact. Kilogray definition: kilogray; Milligray definition: milligray.
Worked examples
- A reading of 15 kGy converts to 15000000 mGy.
15 kGy × 1000000 = 15000000 mGy - A value of 50 kGy is 50000000 mGy.
50 kGy × 1000000 = 50000000 mGy
Kilogray to Milligray conversion table
| Kilograys (kGy) | Milligrays (mGy) |
|---|---|
| 1 kGy | 1000000 mGy |
| 5 kGy | 5000000 mGy |
| 10 kGy | 10000000 mGy |
| 15 kGy | 15000000 mGy |
| 25 kGy | 25000000 mGy |
| 30 kGy | 30000000 mGy |
| 50 kGy | 50000000 mGy |
| 100 kGy | 100000000 mGy |
| 1000 kGy | 1000000000 mGy |
| 10000 kGy | 10000000000 mGy |
Where it's used
Kilograys are used for sterilisation of medical devices (25 kGy), while milligrays appear in CT dose index (CTDIvol). Both measure absorbed dose of ionising radiation, so the conversion is a fixed factor.
Kilogray to other absorbed dose units
| Conversion | 1 kGy equals |
|---|---|
| kilogray to milligray | 1000000 mGy |
| kilogray to gray | 1000 Gy |
| kilogray to rad | 100000 rad |
| kilogray to microgray | 1000000000 µGy |
| kilogray to centigray | 100000 cGy |
| kilogray to millirad | 100000000 mrad |
Frequently asked questions
How many milligrays are in 1 kilogray?
1 kGy = 1000000 mGy.
How do I convert kilograys to milligrays?
Multiply the value in kGy by 1000000. For example, 15 kGy × 1000000 = 15000000 mGy.
Is the kGy to mGy conversion exact?
Yes. Both units are defined exactly, and 1 kGy is exactly 1000000 mGy.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (becquerel, gray, sievert, lux) and Table 2 (candela).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Kilograys to Milligrays (kGy to mGy). Retrieved October 25, 2026, from https://scientificconverters.com/absorbed-dose/kilograys-to-milligrays/
IEEE
Scientific Converters, "Convert Kilograys to Milligrays (kGy to mGy)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/absorbed-dose/kilograys-to-milligrays/