How many rads are in one gray?

One gray equals 100 rad. The formula is rad = Gy × 100.

How do I convert grays to rads?

Multiply the value in grays by 100. For example, 100 × 100 = 10,000 — so 100 Gy = 10,000 rad.

Pair · linear · factor 100

grays to rads

Gyrad

Active unit

grays · ≈ 100 Gy (base)

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Gygray100

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Frequently asked questions

An emerald radiation beam splitting into a precise ray and a scattered cloud over the outline of a human figure, against a cosmic nebula in violet and magenta

Absorbed dose

The gray that heals and kills

A dose of 60 grays aimed at a tumor saves a life. A dose many times smaller, spread across the whole body, kills with no hope of rescue. Same unit — and less energy than a crumb of chocolate carries. This is the thermodynamic paradox of the absorbed dose.

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