Do I need to install anything?

No. It runs in any modern browser, free, with no account required.

For First Responders · Radiation Dose

Radiation Dose for a medical isotope

Built for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field. Simulate a medical isotope live below — adjust the inputs and watch it respond, right in your browser.

Radiation DoseLive

exposure, distance & time

Your dose vs common references (mSv, log scale)

Your exposure

0.0031

Dental X-ray

0.0050

Chest X-ray

0.10

Annual limit (public)

1.00

CT scan

7.00

Annual limit (worker)

20.00

Controls

Presets

Source activity (MBq)

Distance (m)

Exposure time (hr)

The three ways to reduce radiation dose are time, distance, and shielding. Dose builds with exposure time but falls with the square of distance — doubling your distance quarters the dose. Effective dose in millisieverts lets you compare any exposure to everyday references like a chest X-ray or the annual background dose. Educational estimate only.

▶ Run in Python

Data Inspector

Dose rate0.0031 mSv/hr

Total dose0.003 mSv

≈ bananas31

Risk levelvery low

Governing equation

D = \frac{Γ A}{r ^{2}} t = \frac{8.4 \times 1 0 ^{- 5} \cdot 37}{1 ^{2}} \cdot 1 = 0.003 mSv

Reading this result: At 1 m for 1 h the estimated dose is 0.003 mSv — about 31 banana-equivalents, a low everyday-scale exposure.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

or unlock everything with Pro →

Also for:Students Researchers Educators Engineers Hobbyists & Makers K-12 Students General version →

More with Radiation Dose

Radiation Dose for a reactor core Radiation Dose for a radiation shield Radiation Dose for a fuel rod Radiation Dose for a Geiger counter Radiation Dose for a nuclear decay Radiation Dose for a PET scan Radiation Dose for an X-ray dose Radiation Dose for a fusion plasma

Frequently asked questions

Is this good for first responders?: Yes — this version of "Radiation Dose for a medical isotope" is framed for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.