Convert Gray to Sievert
Type the number of grays that you wish to convert to sieverts.
How to Convert Grays to Sieverts
The gray and sievert are both units of radiation dose. By definition, 1 gray equals exactly 1 sieverts. This means to convert grays to sieverts, you multiply by 1.
Formula
Step-by-Step Example
Convert 5 Gy to sieverts:
We need to convert grays to sieverts
Since 1 Gy = 1 Sv, multiply by 1
5 × 1 = 5
5 Gy = 5 Sv
Gray to Sievert Conversion Table
Quick reference table for common gray to sievert conversions. Click any value for detailed calculation.
| Grays (Gy) | Sieverts (Sv) |
|---|---|
| 1 Gy | 1 Sv |
| 2 Gy | 2 Sv |
| 5 Gy | 5 Sv |
| 10 Gy | 10 Sv |
| 15 Gy | 15 Sv |
| 20 Gy | 20 Sv |
| 25 Gy | 25 Sv |
| 50 Gy | 50 Sv |
| 100 Gy | 100 Sv |
About These Units
Gray (Gy)
The gray (Gy) is the SI unit of absorbed dose: energy deposited per unit mass (1 Gy = 1 J/kg). Named after Louis Harold Gray. For gamma/X-rays and beta particles, 1 Gy ≈ 1 Sv (quality factor Q=1). Radiation therapy total dose: 40-80 Gy.
Sievert (Sv)
The sievert (Sv) is the SI unit of equivalent dose, measuring biological effect of radiation exposure. Accounts for radiation type via quality factors. 1 Sv = significant health risk, 4-5 Sv = 50% fatality (LD50). Acute exposure above 0.5 Sv causes radiation sickness.
Frequently Asked Questions
How do I convert grays to sieverts?
To convert grays to sieverts, multiply the value by 1. For example, 10 Gy = 10 Sv.
How many sieverts are in 1 gray?
1 gray equals 1 sieverts.
What is the formula for grays to sieverts?
The formula is: Sv = Gy × 1.