Microplastics Exposure Calculator
How Much Plastic Are You Consuming?
Estimate your weekly microplastic exposure based on your diet, water source, and lifestyle habits. Research suggests the average person may consume up to 5 grams of microplastics per week — the equivalent of a credit card. See your personalized estimate and learn how to reduce exposure.
Water Consumption
Primary SourceRecommended: 2-3 liters per day
Diet
Packaged, canned, or pre-made foods
Plastic tea bags release significant microplastics
Environment & Habits
Polyester, nylon, acrylic — shed microfibers when worn/washed
Weekly Microplastic Exposure
23,779
particles per week
High ExposureAnnual Microplastic Intake
3.09 grams
≈ 0.6 credit cards per year
(1 credit card ≈ 5 grams of plastic)
Exposure Sources
Top Ways to Reduce Exposure
- -1%Use glass/stainless steel instead of plastic containers
Sources: WWF/Newcastle 2019, PNAS 2024, NEJM 2024
Estimates are based on published research averages. Individual exposure varies significantly.
What Are Microplastics?
Microplastics are tiny plastic particles smaller than 5mm in diameter. They come from the breakdown of larger plastic items, synthetic clothing fibers, tire wear, and industrial processes. They're found virtually everywhere — in our water, food, air, and even our blood and organs.
Main Sources of Microplastic Exposure
- Drinking Water: Bottled water contains significantly more microplastics than tap water (~94 vs ~57 particles per liter). Filtered water (RO) reduces this by ~95%.
- Seafood: Fish and shellfish accumulate microplastics from ocean pollution. ~150 particles per 150g serving.
- Air: Indoor air often contains more microplastics than outdoor air, from synthetic textiles, carpets, and building materials.
- Food Packaging: Heating food in plastic containers releases significantly more microplastics. Processed foods in plastic packaging also contribute.
- Tea Bags: A single plastic tea bag can release billions of nanoparticles and millions of microparticles into your cup.
- Sea Salt: Contains ~110 particles per kg, compared to ~30 in rock salt.
Health Concerns
Research on health effects of microplastics is rapidly evolving. A 2024 NEJM study found microplastics in arterial plaques, associated with increased cardiovascular risk. Other studies have found microplastics in human blood, lungs, liver, and placental tissue. Potential concerns include inflammation, oxidative stress, endocrine disruption, and cellular damage.
How to Reduce Your Exposure
- Use a reverse osmosis or activated carbon water filter
- Avoid heating food in plastic containers — use glass or ceramic
- Choose loose-leaf tea over plastic tea bags
- Wear more natural fiber clothing (cotton, wool, linen)
- Reduce consumption of highly processed foods
- Use stainless steel or glass water bottles
Frequently Asked Questions
Is it true we eat a credit card's worth of plastic per week?
This widely cited figure comes from a 2019 WWF/University of Newcastle study. More recent research suggests the actual amount may vary significantly based on lifestyle factors, with some estimates being lower (~4.1 µg/week median). Our calculator helps you estimate your personal exposure based on your specific habits.
Does filtering water really help?
Yes. Reverse osmosis (RO) filters remove approximately 95% of microplastics from water. Activated carbon filters also help but are less effective. Simply switching from bottled to filtered tap water can significantly reduce your exposure.
Are microplastics dangerous?
Research is ongoing. A 2024 NEJM study linked microplastics in arterial plaques to higher cardiovascular risk. Other studies show potential for inflammation and endocrine disruption. While long-term health effects are not yet fully understood, reducing exposure is a reasonable precautionary approach.