Radiation Dose Calculator
Cumulative radiation dose and annual limit comparison.
Enter your values
Enter the dose rate in µSv/hour.
Enter the exposure time in hours.
Enter the existing annual dose in mSv.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Dose from this exposure
- 2.4 µSv
- Dose from this exposure
- 0.0024 mSv
- New annual total
- 0.002 mSv
- Percent of 1 mSv public limit
- 0.2%
Quick answer
Cumulative dose = dose rate x exposure time.
Dose = rate x time
At a glance
| What it does | Cumulative radiation dose and annual limit comparison. |
|---|---|
| Category | Science |
| Inputs needed | Dose rate, Exposure time, Existing annual dose |
| Main output | Dose from this exposure |
| Formula | Dose = rate x time |
| Cost | Free — no sign-up, no download |
How to use the Radiation Dose Calculator
- 1Enter the dose rate (measured from a dosimeter or published source data).
- 2Enter how many hours the exposure lasts.
- 3Add any existing annual dose to see the running total against common limits.
Inputs explained
- Dose rate(µSv/hour)
- Enter the dose rate in µSv/hour.
- Exposure time(hours)
- Enter the exposure time in hours.
- Existing annual dose(mSv)
- Enter the existing annual dose in mSv.
Worked example
Using the values the calculator loads with:
Inputs
- Dose rate0.1 µSv/hour
- Exposure time24 hours
- Existing annual dose0 mSv
Results
- Dose from this exposure2.4 µSv
- Dose from this exposure0.0024 mSv
- New annual total0.002 mSv
- Percent of 1 mSv public limit0.2%
Frequently asked questions
What is a typical background dose?
Natural background radiation is roughly 2-3 mSv per year worldwide, varying by location.
What is the public dose limit?
Regulatory bodies commonly set 1 mSv/year for the public above background and medical exposure.
What do I need to enter into the Radiation Dose Calculator?
Just 3 values: dose rate, exposure time, existing annual dose. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Radiation Dose Calculator work out the answer?
Cumulative dose = dose rate x exposure time. It applies the formula Dose = rate x time and shows the working so you can check each step by hand.
Is the Radiation Dose Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.