Copper Intake Calculator
Score daily copper percent and gap from foods by life stage.
What it does
Copper helps blood and nerves in trace amounts. Shellfish, nuts, and whole grains carry it, while zinc heavy supplements can block it.
The tool above scores the day. An adult woman target is 900 mcg, so 750 mcg reads 83.3 % with 150 mcg more to find. Breastfeeding targets 1300 mcg.
Shellfish sets the pace. Oysters hold several times the day in one serving, while nuts and grains add steady smaller shares.
Zinc competes at the gut. High dose zinc pills taken long term can push copper down, so the two need joint review.
Weeks beat days. Travel and skipped seafood weeks swing any single tally, so average seven before acting.
How to use
- Pick life stage.
- Enter food copper in mcg.
- Read target first.
- Read percent next.
- Read gap and add shellfish or nuts.
- Score a week, not one meal.
Formula
- stage
- Life stage setting the target.
- food
- Copper from foods, in mcg.
Targets follow NIH ODS recommended intakes. Food mcg comes from labels or USDA FoodData entries summed for the day.
Worked example
Example: adult woman, 750 mcg from food
Defaults: adult woman eating 750 mcg. These are also the default values, so the page opens on this answer.
- Stage: adult woman, target 900 mcg.
- Food: 750 mcg from shellfish and grains.
- Share: 750 / 900 x 100 = 83.3 %.
- Gap: 900 - 750 = 150 mcg more.
- Tool shows 900 mcg, 83.3 %, 150 mcg more.
Reference table
| Stage | Target | Example score |
|---|---|---|
| Child | 440 mcg | 300 mcg is 68.2 % |
| Adult woman | 900 mcg | 750 mcg is 83.3 % |
| Pregnancy | 1000 mcg | 800 mcg is 80 % |
| Breastfeeding | 1300 mcg | 1000 mcg is 76.9 % |
Limits
- Intake scoring only, not medical advice.
- Labels vary by brand.
- Zinc supplements shift status.
- Symptoms need clinicians, not math.
Common mistakes
- Scoring one meal instead of the day.
- Long term zinc with no copper check.
- Mixing mcg and mg on labels.
- Ignoring shellfish weeks versus not.
- Treating percent as a diagnosis.
Try it yourself
Quick checks. Answers sit tucked under each question.
Adult man eating 600 mcg?
Target is 900 mcg. Share is 600 / 900 x 100 = 66.7 %. Gap is 300 mcg more.
Pregnancy, eating 800 mcg?
Target is 1000 mcg. Share is 800 / 1000 x 100 = 80 %. Gap is 200 mcg more.
Questions
How do I score my day?
Divide food mcg by the stage target. Here 750 / 900 x 100 = 83.3 %.
What are the targets?
Kids 440 mcg, teens 890 mcg, adults 900 mcg, pregnancy 1000 mcg, breastfeeding 1300 mcg.
Which foods carry copper?
Oysters and shellfish lead far ahead, then organ meats, shiitake, nuts, and whole grains.
How do I close the gap?
Add shellfish, nuts, or whole grains. Here 150 mcg more closes the day.
Does zinc interfere?
Yes. High dose zinc supplements block copper uptake, so balance matters.
Does this diagnose deficiency?
No. Intake scoring only; blood counts need clinicians.