Convert Ergs per gram to Rads
Convert Ergs per gram (erg/g) to Rads (rad) instantly and accurately.
Conversion Formula
rad = erg/g × 0.01
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.
About Rads
The rad (rad) equals exactly 0.01 Gy = 100 erg/g. The pre-SI unit of absorbed dose, defined by the ICRU in 1953, still widely used in the US in radiation therapy (cGy = rad numerically), radiation biology, and NRC regulations. Whole-body 50% lethal dose (LD50) for humans ~350-450 rad. 1 rad = 0.01 Gy = 1 cGy.
Quick Reference Table
| Ergs per gram (erg/g) | Rads (rad) |
|---|---|
| 1 erg/g | 0.01 rad |
| 2 erg/g | 0.02 rad |
| 5 erg/g | 0.05 rad |
| 10 erg/g | 0.1 rad |
| 25 erg/g | 0.25 rad |
| 50 erg/g | 0.5 rad |
| 100 erg/g | 1 rad |