What is being measured?
Absorbed dose is deposited energy per mass. It is not the same quantity as equivalent dose or a clinical interpretation.
rad means radiation absorbed dose here, not radians. Absorbed dose does not directly convert to equivalent dose without radiation weighting.
Choose a unit definition
Symbols, prefixes and conventions matter. Each row links to a definition, a worked example and a comparison table. Units of different quantities are kept separate even when symbols or dimensions look similar.
Grays (Gy)
Definition, reference values and linked conversions.
Milligrays (mGy)
Definition, reference values and linked conversions.
Micrograys (µGy)
Definition, reference values and linked conversions.
Rads (absorbed dose) (rad)
Definition, reference values and linked conversions.
Kilograys (kGy)
Definition, reference values and linked conversions.
Nanograys (nGy)
Definition, reference values and linked conversions.
Choose the conversion direction
Start with the unit attached to the original measurement. Select the unit needed by the receiving report, specification or formula. Conversion tools preserve the measured quantity; calculating another property can require additional measured inputs and assumptions.
Precision and common mistakes
- Keep the source and target quantity consistent. A matching symbol is not enough to establish a compatible definition.
- Record the original measurement precision. Showing twelve significant digits in a table does not make a rounded input more precise.
- Check symbol capitalization, prefixes and any regional convention in the source. Use the displayed unit definition rather than a similarly named unit.
- Factors involving repeating fractions or π use finite numerical precision. Round the final answer to the precision justified by your input.
Unit reference only. These pages do not assess biological effects, clinical use, exposure limits or radiation safety. Absorbed dose, equivalent dose, activity and exposure remain different quantities; unit scaling cannot convert one into another.
Use a working converter
- Absorbed radiation dose converter
- Grays to Milligrays converter
- Milligrays to Grays converter
- Grays to Micrograys converter
- Micrograys to Grays converter
- Grays to Rads (absorbed dose) converter
Source and verification scope
Examples and tables are computed from the versioned unit definitions used by the linked converters. The source access dates appear below. Computandum is independent of the cited organizations; a citation does not mean that a publisher endorses this page or an actual project.