Sv dose equivalente H=Q·D
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The sievert equivalent dose calculator (H = Q·D) computes the equivalent dose, which measures the biological risk of different radiation types. The formula uses a quality factor (Q), dependent on radiation type, multiplied by the absorbed dose in grays (D). This is critical in nuclear safety, radiation therapy, and imaging diagnostics.
To use the tool, input the absorbed dose in grays and select the quality factor for the radiation type (e.g., Q=1 for X-rays, Q=20 for neutrons). The result, in sieverts, reflects the biological impact on the body.
Apply this calculator when comparing risks across radiation types or when regulatory standards require converting absorbed doses to equivalent doses. Always verify updated quality factors from the International Commission on Radiological Protection (ICRP).
Frequently asked questions
What's the difference between absorbed dose and equivalent dose?
Absorbed dose (grays) measures energy deposited in tissue, while equivalent dose (sieverts) adjusts this with the radiation's biological risk.
What is the quality factor (Q)?
Q converts radiation into biological risk: higher values indicate more harmful effects (e.g., Q=1 for X-rays, Q=20 for neutrons).
When should I use this calculator?
Use it for nuclear safety assessments, nuclear medicine, or when regulations require converting absorbed doses to equivalent doses.
Which units should I input?
Enter the absorbed dose in grays (Gy), and the result will be in sieverts (Sv), the WHO-standard unit for biological risk.