HPCalc

Disclaimer: This software is for radiation protection education, screening calculations, and professional support only. It does not replace qualified health physicist judgment, regulatory requirements, approved procedures, emergency response tools, or formal shielding design review. Exposure, absorbed dose, equivalent dose, and effective dose are distinct quantities; do not equate R and Sv without explicit context and assumptions.

Calculator Hub

Open a calculator. Each card shows the support tier, a short scope line, and the same screening disclaimer used on the dashboard. Cards respect the active theme and use a clear focus ring for keyboard navigation.

Decay

Activity vs time using bundled half-lives; screening and documentation.

Screening / documentation — not a substitute for licensed programs or formal dose assignment.

Point source

Inverse-square dose rate from activity and gamma constant; stated geometry assumptions.

Screening / documentation — not a substitute for licensed programs or formal dose assignment.

Time / distance

Dose or rate scaling with time and distance factors; not occupancy modeling.

Screening / documentation — not a substitute for licensed programs or formal dose assignment.

Shielding

Narrow-beam attenuation (HVL/TVL); optional custom μ with audit fields.

Screening / documentation — not a substitute for licensed programs or formal dose assignment.

Unit converter

SI and traditional radiation and survey units; optional converter report.

Screening / documentation — not a substitute for licensed programs or formal dose assignment.

Contamination & surveys

Wipe, direct frisk, skin screening worksheet, and survey statistics.

Screening / documentation — not a substitute for licensed programs or formal dose assignment.

Internal dose

Intake, ingestion, inhalation, DAC-hours, and ALI fraction screening.

Screening / documentation — not a substitute for licensed programs or formal dose assignment.

Spectroscopy

Energy/efficiency calibration, ROI activity, FWHM, and MDA-style screening.

Screening / documentation — not a substitute for licensed programs or formal dose assignment.

Waste / decay-in-storage

Decay-in-storage, ten half-lives, inventory worksheet, and survey checklist.

Screening / documentation — not a substitute for licensed programs or formal dose assignment.

Air sampling & DAC

Sample volume, concentration, DAC fraction/hours, filter count, grab worksheet.

Screening / documentation — not a substitute for licensed programs or formal dose assignment.