Grays to Rads Converter
Quick answer: To convert grays to rads, multiply by 100. For example, 10 Gy is 1,000 rad. One gray equals 100 rad.
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Use the Grays to Rads Converter
Grays to Rads formula and what each symbol means
rad = Gy × 100
| Symbol | Meaning |
|---|---|
| Gy | Gray |
| rad | Rad |
Grays to Rads examples
1 Gy
1 Gy × 100 = 100 rad.
10 Gy
10 Gy × 100 = 1,000 rad.
100 Gy
100 Gy × 100 = 10,000 rad.
Grays compared with Rads
One Gy is 100 times as large as one rad, so your number gets bigger when you convert grays to rads and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.
About grays and rads
Gray (Gy): The gray, one joule per kilogram. Rad (rad): The rad, exactly 0.01 Gy.
How to calculate Grays to Rads step by step
- Enter the value in Gy (the starting unit).
- Multiply by 100, because 1 Gy = 100 rad.
- The product is the value in rad. To go back, divide by 100 or multiply by 0.01.
Popular radiation absorbed dose conversions
How to read your Grays to Rads result
Absorbed dose is energy deposited per unit mass.
| GRAYS | RADS |
|---|---|
| 1 | 100 |
| 2 | 200 |
| 5 | 500 |
| 10 | 1,000 |
| 20 | 2,000 |
| 50 | 5,000 |
| 100 | 10,000 |
| 1,000 | 100,000 |
Rads to Grays: quick table
| RADS | GRAYS |
|---|---|
| 1 | 0.01 |
| 5 | 0.05 |
| 10 | 0.1 |
| 25 | 0.25 |
| 50 | 0.5 |
| 100 | 1 |
| 250 | 2.5 |
| 500 | 5 |
Common mistakes when calculating Grays to Rads
- Confusing absorbed dose (Gy) with dose equivalent (Sv).
- Dividing when you should multiply: from Gy to rad multiply by 100; from rad to Gy divide by 100.
Grays to Rads FAQ
How many rad are in 1 Gy?
1 Gy equals 100 rad.
How many Gy are in 1 rad?
1 rad equals 0.01 Gy.
Is 1 Gy = 100 rad an exact conversion?
The factor is shown rounded to 7 significant figures (100). The calculator above uses more digits.
What is a rad (rad)?
The rad, exactly 0.01 Gy.
How can I estimate grays to rads in my head?
One Gy is 100 times as large as one rad, so your number gets bigger when you convert grays to rads and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.
What is 30 Gy in rads?
30 Gy = 3,000 rad (since 30 × 100).
What is 150 Gy in rads?
150 Gy = 15,000 rad (since 150 × 100).
What is 0.5 Gy in rads?
0.5 Gy = 50 rad (since 0.5 × 100).
How many decimals should I keep when converting Gy to rad?
Match the precision of your original measurement. For example, 1,000 rad rounds to 1,000 rad at 3 significant figures; keep more digits only for engineering or scientific work.
More in Radiation Absorbed Dose converters
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST: SI units and derived units, NIST SP 811, Appendix B.8: conversion factors