Converter group

Radiology Converters

Radiation - Absorbed Dose Converter

Value

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Result

... Femtogray = ... Milligray

Result

... Femtogray

... Milligray

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Use this page to convert femtogray values into milligray, with background details, formulas, a worked example, and a quick conversion table.

1 fGy = 0.000000000001 mGy

1 mGy = 1,000,000,000,000 fGy

Example: 1 fGy = 0.000000000001 mGy

One femtogray is one quadrillionth of a gray (1.0E-15 grays).

History: SI prefix femto- applied to the gray.

Current use: Purely theoretical or specialized physics.

Also written as fGy.

One milligray is equal to 0.001 grays.

History: Standard SI prefix applied to the gray.

Current use: Commonly used in diagnostic radiology to express patient doses (e.g., CT scans).

Also written as mGy, milligrays.