Radiation Dose Calculator | Radiation Protection

Terrestrial (from the ground)

What region of the US do you live in?

Gulf Coast ( AL, FL, LA, MS, TX ) (23 mrem)

Atlantic Coast ( CT, DC, DE, FL, GA, MA, ME, MD, NC, NH, NJ, NY, PA, RI, SC, VA ) (23 mrem)

The Colorado Plateau ( AZ, CO, NM, UT ) (90 mrem)

Elsewhere in the US ( AK, AR, CA, ID, IL, IN, IA, KS, KY, MI, MN, MO, MT, NE, NV, ND, OH, OK, OR, SD, TN, VT, WA, WV, WI, WY ) (46 mrem)

Cosmic Radiation (from space)

What is the elevation (in feet) of your town?

up to 1000 (2 mrem)

1000-2000 (5 mrem)

2000-3000 (9 mrem)

3000-4000 (15 mrem)

4000-5000 (21 mrem)

5000-6000 (29 mrem)

6000-7000 (40 mrem)

7000-8000 (53 mrem)

above 8000 (70 mrem)

Cosmic radiation at sea level

26 mrem

Internal Radiation (in your body)

Internal radiation from food and water (e.g., potassium)

40 mrem

Do you have porcelain crowns or false teeth?

Travel Related Sources

How many miles have you traveled by jet this year? (1 mrem per every 1000 miles)

How many times did you go through a screening machine (PDF) (3 pp, 511K, About PDF)

at the airport over the last year? (.003 average mrem each)

Are x-ray luggage inspection machines used at your airport?

Do you use gas lantern mantles when camping?

Other Sources

If you are a radiation worker, enter your exposure here. - More info for radiation workers

How many packs of cigarettes do you smoke per day? (0.49 mrem per pack)

Weapons Test Fallout - more info about weapons test fallout (PDF) (3 pp, 518K, About PDF)

1 mrem

Do you live in a stone, brick, or concrete building?

Do you wear a luminous wristwatch?

Do you have a smoke detector (PDF) (2 pp, 310K, About PDF) in your home?

Do you live within 50 miles of a nuclear power plant (PDF) (2 pp, 247K, About PDF)?

Do you live within 50 miles of a coal fired power plant (PDF) (2 pp, 404K, About PDF)?

Radon

EPA estimates that about 21,000 lung cancer deaths each year in the U.S. are radon-related. Exposure to radon is the second leading cause of lung cancer after smoking.

For most people, radon is the single greatest environmental source of radiation exposure. Learn more about radiation sources and doses, including radon. For smokers, the risk of lung cancer is significant due to the combined effects of radon and smoking.

Have you tested your home for radon?

Yes
No

If you tested your home for radon, please enter the results of your radon test (for example - 5.7 pCi/L would be entered as 5.7)

If you do not have your radon results with you, or if you have not tested your home for radon yet, you can use EPA's radon data for the state you live in.

The radon levels by location are averages based on published data. A value of zero means that reliable data were unavailable for the selected location--it does not mean that there is no radon there. Radon levels vary from house to house in any given location. The only way to know your radon level for sure is to test your home.

Select your state

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Your total radiation dose per year is mrem