Convert Sievert to Gray
Enter the number of sieverts that you want to convert to grays.
How to Convert Sieverts to Grays
The sievert and gray are both units of radiation dose. By definition, 1 sievert equals exactly 1 grays. This means to convert sieverts to grays, you multiply by 1.
Formula
Step-by-Step Example
Convert 5 Sv to grays:
We need to convert sieverts to grays
Since 1 Sv = 1 Gy, multiply by 1
5 × 1 = 5
5 Sv = 5 Gy
Sievert to Gray Conversion Table
Quick reference table for common sievert to gray conversions. Click any value for detailed calculation.
| Sieverts (Sv) | Grays (Gy) |
|---|---|
| 1 Sv | 1 Gy |
| 2 Sv | 2 Gy |
| 5 Sv | 5 Gy |
| 10 Sv | 10 Gy |
| 15 Sv | 15 Gy |
| 20 Sv | 20 Gy |
| 25 Sv | 25 Gy |
| 50 Sv | 50 Gy |
| 100 Sv | 100 Gy |
About These Units
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.
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.
Frequently Asked Questions
How do I convert sieverts to grays?
To convert sieverts to grays, multiply the value by 1. For example, 10 Sv = 10 Gy.
How many grays are in 1 sievert?
1 sievert equals 1 grays.
What is the formula for sieverts to grays?
The formula is: Gy = Sv × 1.