Grays to Rads Converter

1 gray (Gy) equals 100 rads (rad).

Quick answer

  • 1 gray = 100 rads
  • 1 rad = 0.01 grays
  • Formula: rad = Gy × 100

1 gray = 100 rads

How to convert grays to rads

rad = Gy × 100

To convert grays to rads, multiply the number of grays by 100.

Example: 42 Gy to rad

  1. Start with the value in grays: 42 Gy.
  2. Multiply by 100: 42 × 100 = 4,200.
  3. Result: 42 grays = 4,200 rads.

Going the other way, 1 rad = 0.01 grays, so to convert rads back to grays you divide by the same number. See rads to grays.

Grays to rads conversion table

Grays (Gy)Rads (rad)
0.1 Gy 10 rad
0.2 Gy 20 rad
0.3 Gy 30 rad
0.4 Gy 40 rad
0.5 Gy 50 rad
0.6 Gy 60 rad
0.7 Gy 70 rad
0.8 Gy 80 rad
0.9 Gy 90 rad
1 Gy 100 rad
1.5 Gy 150 rad
2 Gy 200 rad
2.5 Gy 250 rad
3 Gy 300 rad
3.5 Gy 350 rad
4 Gy 400 rad
4.5 Gy 450 rad
5 Gy 500 rad
6 Gy 600 rad
7 Gy 700 rad
7.5 Gy 750 rad
8 Gy 800 rad
9 Gy 900 rad
10 Gy 1,000 rad
11 Gy 1,100 rad
12 Gy 1,200 rad
13 Gy 1,300 rad
14 Gy 1,400 rad
15 Gy 1,500 rad
16 Gy 1,600 rad
17 Gy 1,700 rad
18 Gy 1,800 rad
19 Gy 1,900 rad
20 Gy 2,000 rad
21 Gy 2,100 rad
22 Gy 2,200 rad
23 Gy 2,300 rad
24 Gy 2,400 rad
25 Gy 2,500 rad
26 Gy 2,600 rad

More Gy to rad values

What is a gray?

The gray is the SI unit of absorbed dose.

More about grays →

What is a rad?

The rad (radiation absorbed dose) is the older unit of absorbed dose, equal to 0.01 gray or 100 ergs of energy per gram of tissue.

More about rads →

Convert grays to other units

Convert other units to rads

Frequently asked questions

How many rads are in a gray?

One gray is 100 rads.

How many grays are in a rad?

One rad is 0.01 grays.

What is the formula to convert grays to rads?

rad = Gy × 100.