Rad to Gray (Rad to Gray)
Result
0.01 Gray
Formula
Gray = Rad × 0.01
1 Rad = 0.01 Gray, and 1 Gray = 100 Rad.
One gray is one joule of energy absorbed per kilogram; the older rad is 0.01 Gy. One becquerel is one decay per second; the curie is exactly 3.7 × 10¹⁰ Bq.
Worked examples
- 1 Rad × 0.01 = 0.01 Gray
- 10 Rad × 0.01 = 0.1 Gray
- 100 Rad × 0.01 = 1 Gray
Common mistakes
- Gray measures absorbed energy; the sievert measures biological effect (equivalent dose). They are only numerically equal for X-rays, gamma and beta radiation.
- Becquerels describe how radioactive a source is, not the dose a person receives.
Rad to Gray table
| Rad (Rad) | Gray (Gray) |
|---|---|
| 1 | 0.01 |
| 2 | 0.02 |
| 5 | 0.05 |
| 10 | 0.1 |
| 20 | 0.2 |
| 50 | 0.5 |
| 100 | 1 |
| 1,000 | 10 |
The units
- Rad (Rad)
- 1 Rad = 0.01 Gray.
- Gray (Gray)
- A unit of radiation.
Sources for these factors
- The International System of Units (SI Brochure), 9th edition — BIPM
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy