Radiation · Converter

Roentgen to Gray

Convert roentgen (R) to gray (Gy) instantly with our free online Radiation converter.

Roentgen to Gray

From

1 R = — Gy

Easily convert roentgen to gray using this precise, free online tool. Enter a value and get an instant result. The conversion factor used is 1 R = 8.770000e-3 Gy.

Formula

value in Gy = value in R × 0.00877

How to convert

Enter the value you want to convert in the "From" field.
Select the source unit from the dropdown.
Select the target unit in the "To" dropdown.
The result updates instantly in real time.

Conversion Table

Unit	Abbreviation	Value
Roentgen	R	1
Gray	Gy	0.0088

FAQ

How many gray are in 1 roentgen?+

1 Roentgen (R) equals 0.00877 Gray (Gy).

How do I convert roentgen to gray?+

Multiply the value in Roentgen by 0.00877 to get the equivalent value in Gray.

Is this Roentgen to Gray converter accurate?+

Yes, this converter uses precise, internationally recognized conversion factors for accurate results.

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