Rads to Grays Converter
Quick answer: To convert rads to grays, multiply by 0.01. For example, 10 rad is 0.1 Gy. One rad equals 0.01 Gy.
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Use the Rads to Grays Converter
Rads to Grays formula and what each symbol means
Gy = rad × 0.01
| Symbol | Meaning |
|---|---|
| rad | Rad |
| Gy | Gray |
Rads to Grays examples
1 rad
1 rad × 0.01 = 0.01 Gy.
10 rad
10 rad × 0.01 = 0.1 Gy.
100 rad
100 rad × 0.01 = 1 Gy.
Rads compared with Grays
One Gy is 100 times as large as one rad, so your number gets smaller when you convert rads to grays and bigger when you convert back. If the answer is not smaller than what you typed, you multiplied instead of dividing.
About rads and grays
Rad (rad): The rad, exactly 0.01 Gy. Gray (Gy): The gray, one joule per kilogram.
How to calculate Rads to Grays step by step
- Enter the value in rad (the starting unit).
- Multiply by 0.01, because 1 rad = 0.01 Gy.
- The product is the value in Gy. To go back, divide by 0.01 or multiply by 100.
Popular radiation absorbed dose conversions
How to read your Rads to Grays result
Absorbed dose is energy deposited per unit mass.
| RADS | GRAYS |
|---|---|
| 1 | 0.01 |
| 2 | 0.02 |
| 5 | 0.05 |
| 10 | 0.1 |
| 20 | 0.2 |
| 50 | 0.5 |
| 100 | 1 |
| 1,000 | 10 |
Grays to Rads: quick table
| GRAYS | RADS |
|---|---|
| 1 | 100 |
| 5 | 500 |
| 10 | 1,000 |
| 25 | 2,500 |
| 50 | 5,000 |
| 100 | 10,000 |
| 250 | 25,000 |
| 500 | 50,000 |
Common mistakes when calculating Rads to Grays
- Confusing absorbed dose (Gy) with dose equivalent (Sv).
- Dividing when you should multiply: from rad to Gy multiply by 0.01; from Gy to rad divide by 0.01.
Rads to Grays FAQ
How many Gy are in 1 rad?
1 rad equals 0.01 Gy.
How many rad are in 1 Gy?
1 Gy equals 100 rad.
Is 1 rad = 0.01 Gy an exact conversion?
The factor is shown rounded to 7 significant figures (0.01). The calculator above uses more digits.
What is a gray (Gy)?
The gray, one joule per kilogram.
How can I estimate rads to grays in my head?
One Gy is 100 times as large as one rad, so your number gets smaller when you convert rads to grays and bigger when you convert back. If the answer is not smaller than what you typed, you multiplied instead of dividing.
What is 200 rad in grays?
200 rad = 2 Gy (since 200 × 0.01).
What is 3 rad in grays?
3 rad = 0.03 Gy (since 3 × 0.01).
What is 30 rad in grays?
30 rad = 0.3 Gy (since 30 × 0.01).
How many decimals should I keep when converting rad to Gy?
Match the precision of your original measurement. For example, 0.1 Gy rounds to 0.1 Gy 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