Free interactive tool

Personal Annual Dose Estimator

Pick the option that best fits your life for each source below, and this adds up the radiation dose you receive in a typical year. It's a rough, educational guide to everyday background and medical exposure — not a measurement. Everything runs here in your browser — no sign-up, nothing stored.

Estimate your yearly dose

Choose the closest match for each source. A typical person receives roughly 360 mrem/year (about 3.6 mSv) from natural and medical sources combined. The estimate updates as you change any option.

Altitude above sea level (cosmic)

Ground-based radiation (terrestrial)

Living environment (construction)

Flight time per year

Food & water (carbon-14, potassium-40)

Air (radon)

Within 50 miles of a power plant

Dental accessories

TV / monitor type

Smoking

Chest / skull X-rays

Mammogram X-rays

Cervical spine X-rays

Lumbar spine, upper GI, abdomen & barium-enema X-rays

Dental X-rays

CT scans

Estimated annual dose 0 mrem/yr ≈ 0 mSv/yr

100 mrem = 1 mSv. These are typical reference figures; your real dose depends on local geology, building, lifestyle and medical history.

Want to convert a dose rate between units, or work out acute-exposure timeframes? Use the dose & exposure converter. To plan time against an emergency dose limit, see the stay-time & dose budget tool.