Radiation Absorbed Dose Converter – Convert Gy and Rad

How to Use the Radiation Absorbed Dose Converter

Enter an absorbed dose value, select the source unit and choose the target unit to convert between gray and rad.

Practical Example

1 gray equals exactly 100 rad.

Factors That Affect Absorbed Dose

Actual absorbed dose depends on deposited energy, material mass, radiation type and measurement conditions. The converter changes units only.

Frequently Asked Questions

What is a gray?

Gray is the SI unit of absorbed dose and equals one joule per kilogram.

How many rad are in one gray?

One gray equals 100 rad.

Is absorbed dose the same as equivalent dose?

No. Equivalent dose includes radiation weighting factors.

Understanding Absorbed Dose Units

Absorbed dose measures energy deposited per unit mass. The SI unit gray (Gy) equals one joule per kilogram, while the older rad unit is smaller: 1 Gy = 100 rad.

Absorbed dose is not the same as equivalent or effective dose, which incorporate radiation type or biological weighting and are commonly expressed in sieverts. Use the converter only for matching absorbed-dose units and keep the physical quantity clear when working with radiation measurements or technical documentation.

Understanding Absorbed Dose Units

Absorbed dose describes energy deposited per unit mass. The SI unit gray is defined as one joule per kilogram, and 1 gray equals 100 rad. A unit conversion changes only the numerical representation of the same absorbed dose.

Absorbed dose is not the same as equivalent or effective dose, which apply weighting factors related to radiation type or biological effect. Use the appropriate quantity and unit for the context, especially in medical, laboratory or radiation-safety work.

Unit Relationship and Practical Context

Absorbed dose measures energy deposited per unit mass: 1 gray = 1 J/kg and 1 Gy = 100 rad. Absorbed dose alone does not describe biological effect; equivalent or effective dose applies radiation and tissue weighting where appropriate.