Convert Micrograys to Grays (µGy to Gy)
1 microgray (µGy) = 0.000001 grays (Gy). 1 Gy = 1000000 µGy. Example: 15 µGy = 15 × 0.000001 = 0.000015 Gy.
Also searched as micrograys to Gy, micrograys in Gy, micrograys into grays, µGy to Gy, µGy in grays, µGy into gray, microgray to gray, µGy to grays converter and how many grays in a microgray.
1 µGy = 0.000001 Gy
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk microgray to gray converter to paste a column from Excel.
How to Convert Microgray to Gray
- 1 µGy = 0.000001 Gy
- 1 Gy = 1000000 µGy
- Example: convert 15 µGy to Gy: 15 µGy = 15 × 0.000001 Gy = 0.000015 Gy
Formula
Gy = µGy ÷ 1000000
Derivation from SI units:
- 1 µGy = 10⁻⁶ Gy.
- 1 Gy = 1 J of absorbed energy per kg.
Both units are defined exactly, so the factor is exact. Microgray definition: microgray; Gray definition: gray.
Worked examples
- A reading of 0.5 µGy converts to 5 × 10⁻⁷ Gy.
0.5 µGy × 0.000001 = 5 × 10⁻⁷ Gy - A value of 5 µGy is 0.000005 Gy.
5 µGy × 0.000001 = 0.000005 Gy
Microgray to Gray conversion table
| Micrograys (µGy) | Grays (Gy) |
|---|---|
| 0.001 µGy | 1 × 10⁻⁹ Gy |
| 0.01 µGy | 1 × 10⁻⁸ Gy |
| 0.1 µGy | 1 × 10⁻⁷ Gy |
| 0.5 µGy | 5 × 10⁻⁷ Gy |
| 1 µGy | 0.000001 Gy |
| 2 µGy | 0.000002 Gy |
| 5 µGy | 0.000005 Gy |
| 10 µGy | 0.00001 Gy |
| 50 µGy | 0.00005 Gy |
| 100 µGy | 0.0001 Gy |
Where it's used
Micrograys are used for dental and chest X-ray air kerma, while grays appear in radiotherapy prescriptions. Both measure absorbed dose of ionising radiation, so the conversion is a fixed factor.
Microgray to other absorbed dose units
| Conversion | 1 µGy equals |
|---|---|
| microgray to gray | 0.000001 Gy |
| microgray to milligray | 0.001 mGy |
| microgray to rad | 0.0001 rad |
| microgray to centigray | 0.0001 cGy |
| microgray to kilogray | 1 × 10⁻⁹ kGy |
| microgray to millirad | 0.1 mrad |
Frequently asked questions
How many grays are in 1 microgray?
1 µGy = 0.000001 Gy.
How do I convert micrograys to grays?
Multiply the value in µGy by 0.000001, or divide it by 1000000. For example, 15 µGy × 0.000001 = 0.000015 Gy.
Is the µGy to Gy conversion exact?
Yes. Both units are defined exactly, and 1 µGy is exactly 0.000001 Gy.
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 Micrograys to Grays (µGy to Gy). Retrieved October 25, 2026, from https://scientificconverters.com/absorbed-dose/micrograys-to-grays/
IEEE
Scientific Converters, "Convert Micrograys to Grays (µGy to Gy)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/absorbed-dose/micrograys-to-grays/