Tools & Calculators

Free calculators for medical and health physics, built and checked by OHP’s physicists. Each tool runs right in your browser, with no sign-up and nothing to install.

Patient Release Calculator

Release calculator for patients given I-131 and other radionuclides under Reg Guide 8.39, Rev. 1. Flags written instructions and records.
Radioactive Decay Calculator

Decay a source forward or back to any date and time, or find when it reaches a target activity.

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