Convert Grays to Ergs per gram
Convert Grays (Gy) to Ergs per gram (erg/g) instantly and accurately.
Conversion Formula
erg/g = Gy × 10000
About Grays
The gray (Gy) is the SI coherent unit of absorbed radiation dose, defined as 1 joule of energy deposited per kilogram of matter. Named after Harold Gray (British radiobiologist, 1905-1965). Used globally in radiotherapy: curative tumour doses 40-80 Gy fractionated; total body irradiation before bone marrow transplant 12-14 Gy. 1 Gy = 1 J/kg = 100 rad.
About Ergs per gram
The erg per gram (erg/g) equals exactly 10⁻⁴ Gy and is the CGS-Gaussian unit of absorbed dose. Because 1 rad was originally defined as 100 erg/g, this unit is directly linked to the historical radiation system. Still found in older nuclear physics and health physics texts predating SI adoption. 1 erg/g = 10⁻⁴ Gy = 0.1 mGy.
Quick Reference Table
| Grays (Gy) | Ergs per gram (erg/g) |
|---|---|
| 1 Gy | 10000 erg/g |
| 2 Gy | 20000 erg/g |
| 5 Gy | 50000 erg/g |
| 10 Gy | 100000 erg/g |
| 25 Gy | 250000 erg/g |
| 50 Gy | 500000 erg/g |
| 100 Gy | 1000000 erg/g |