Answer two questions to find out:

  • How much mercury is in the seafood you eat?
  • How do your seafood choices impact the ocean?

Your weight determines how much mercury you can safely consume.

About this calculator
As one of the first organizations to ring the alarm about the dangerous levels of mercury in seafood, Turtle Island Restoration Network (TIRN) continues to stay vigilant of the commercial fishing industry and the impact it has on both ocean health and human health. It’s important to us that consumers make well-informed decisions on actions that directly impact ourselves and our oceans. TIRN does not share, save, or track any data entered in the calculator. View our privacy policy.
Mercury exposure
Mercury exposure is based on data from the U.S. Food and Drug Administration, which tests fish for mercury, and the U.S. Environmental Protection Agency, which suggests mercury levels that it considers safe for women of childbearing age. The agencies determine mercury exposure by calculating the highest average amount of mercury that could be in a fish when eaten one, two, and three times a week without going over the maximum acceptable mercury intake amount for an average pregnant woman. Click here to learn more about mercury and other chemicals, metals and pesticides in seafood.

Bycatch refers to unintended catch, or non-target species that are captured, harmed, and killed in industrial fishing fleets. Bycatch includes fish, sea turtles, marine mammals, seabirds, sharks, and whales that fishermen do not want, cannot sell, or are not allowed to keep. Most are thrown overboard, dead or injured. The scale of mortality due to bycatch is so high worldwide that it threatens the very survival of species and their environments. Click here to learn more about bycatch.

Microplastics are small plastic pieces less than five millimeters long. Microplastics have been detected in marine organisms from plankton to whales, in commercial seafood, and even in drinking water. Click here to learn more about microplastics.
Other Seafood Hazards
The majority of seafood available on the global markets is caught by industrial fisheries. Despite being regulated by government agencies, these fleets are responsible for depleting ocean ecosystems, decimating populations of non-target species, and targeting species that contain high levels of mercury — hazards that impact ocean health and human health. Click here to learn more about seafood hazards.