Gray to Femtogray Conversion

Convert between Gray and Femtogray quickly and accurately.

Gy
fGy

How to Convert Gray to Femtogray

Conversion Formula

1 Gy = 1E+15 fGy
1 fGy = 1E-15 Gy

Example

Convert 15 Gy to fGy:

15 Gy = 15 × 1E+15 fGy = 2E+16 fGy

Unit Information

Learn about the radiation absorbed dose units you're converting between

Gray

Gy

Definition

The SI base unit of absorbed radiation dose equal to 100 rad, representing one joule of energy absorbed per kilogram of matter.

History/Origin

Named after Louis Harold Gray (1905-1965), the British physicist who made significant contributions to radiation dosimetry.

Current Use

Widely used in radiation therapy, medical physics, and radiation protection worldwide.

Multiplier

100

Offset

0

Femtogray

fGy

Definition

A unit of absorbed radiation dose equal to 10^-15 gray, used for ultra-small absorbed dose measurements.

History/Origin

Part of the SI metric system, where femto- is the prefix for 10^-15, used for ultra-small quantities.

Current Use

Used in radiation protection, environmental monitoring, and ultra-small-dose radiation measurements.

Multiplier

1E-13

Offset

0

Gray to Femtogray Conversion Table

Gray [Gy] Femtogray [fGy]
1 Gy 1E+15 fGy
10 Gy 1E+16 fGy
25 Gy 2E+16 fGy
50 Gy 5E+16 fGy
100 Gy 1E+17 fGy
0 Gy 0E+0 fGy
-10 Gy -1E+16 fGy
-40 Gy -4E+16 fGy