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Radiation-Absorbed Dose Converter

Convert gray, rad, centigray, millirad, and more — instantly.

Free radiation absorbed dose converter. Convert gray to rad — the essential clinical radiography conversion (1 gray = 100 rad) — plus centigray, milligray, and the full SI prefix ladder. Use the express converter for any unit pair, or open a quick conversion below.

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1 gray = 100 rads

From

To

Format

Popular conversions

Hand-picked pairs with dedicated converter pages — open one to convert instantly.

Gray → Rad

Gray to Rad

Rad → Gray

Rad to Gray

Gray → Centigray

Gray to Centigray

Centigray → Gray

Centigray to Gray

Rad → Millirad

Rad to Millirad

Millirad → Rad

Millirad to Rad

Browse all radiation absorbed dose units

Pick any unit to open a two-way conversion. Gray ↔ rad is the priority clinical pair — 1 gray = 100 rad. Centigray and millirad conversions are common in radiography and dosimetry references.

From

To

RAD

1 rad = 0.01 Gy

rad → gray (Gy) gray (Gy) → rad

MILLIRAD

1 mrad = 0.001 rad

millirad (mrad) → rad rad → millirad (mrad)

JOULE PER KILOGRAM

1 J/kg = 100 rad

joule per kilogram (J/kg) → rad rad → joule per kilogram (J/kg)

JOULE PER GRAM

1 J/g = 100,000 rad

joule per gram (J/g) → rad rad → joule per gram (J/g)

JOULE PER CENTIGRAM

1 J/cg = 10,000,000 rad

joule per centigram (J/cg) → rad rad → joule per centigram (J/cg)

JOULE PER MILLIGRAM

1 J/mg = 100,000,000 rad

joule per milligram (J/mg) → rad rad → joule per milligram (J/mg)

GRAY

1 Gy = 100 rad

gray (Gy) → rad rad → gray (Gy)

EXAGRAY

1 EGy = 100,000,000,000,000,000,000 rad

exagray (EGy) → rad rad → exagray (EGy)

PETAGRAY

1 PGy = 100,000,000,000,000,000 rad

petagray (PGy) → rad rad → petagray (PGy)

TERAGRAY

1 TGy = 100,000,000,000,000 rad

teragray (TGy) → rad rad → teragray (TGy)

GIGAGRAY

1 GGy = 100,000,000,000 rad

gigagray (GGy) → rad rad → gigagray (GGy)

MEGAGRAY

1 MGy = 100,000,000 rad

megagray (MGy) → rad rad → megagray (MGy)

KILOGRAY

1 kGy = 100,000 rad

kilogray (kGy) → rad rad → kilogray (kGy)

HECTOGRAY

1 hGy = 10,000 rad

hectogray (hGy) → rad rad → hectogray (hGy)

DEKAGRAY

1 daGy = 1,000 rad

dekagray (daGy) → rad rad → dekagray (daGy)

DECIGRAY

1 dGy = 10 rad

decigray (dGy) → rad rad → decigray (dGy)

CENTIGRAY

1 cGy = 0.01 Gy

centigray (cGy) → gray (Gy) gray (Gy) → centigray (cGy)

MILLIGRAY

1 mGy = 0.1 rad

milligray (mGy) → rad rad → milligray (mGy)

MICROGRAY

1 µGy = 0.0001 rad

microgray (µGy) → rad rad → microgray (µGy)

NANOGRAY

1 nGy = 0.0000001 rad

nanogray (nGy) → rad rad → nanogray (nGy)

PICOGRAY

1 pGy = 0.0000000001 rad

picogray (pGy) → rad rad → picogray (pGy)

FEMTOGRAY

1 fGy = 0.0000000000001 rad

femtogray (fGy) → rad rad → femtogray (fGy)

ATTOGRAY

1 aGy = 0.0000000000000001 rad

attogray (aGy) → rad rad → attogray (aGy)