Mineral Calculator

Minerals are inorganic elements that serve essential structural and functional roles throughout the body. From building strong bones and teeth to facilitating nerve transmission, muscle contraction, and enzymatic reactions, minerals are indispensable for human health. This Mineral Calculator provides your personalized daily requirements for eight key minerals based on age, gender, and reproductive status, using the most current Dietary Reference Intakes from the National Academies.

Minerals are categorized as major minerals (needed in amounts greater than 100 mg/day) and trace minerals (needed in smaller quantities). This calculator covers five major minerals — calcium, magnesium, potassium, phosphorus, and iron — and three trace minerals — zinc, selenium, and copper. Together, these eight minerals represent the most commonly deficient and clinically significant dietary minerals.

Calcium is the most abundant mineral in the body, with 99% stored in bones and teeth. Adequate calcium intake throughout life is critical for preventing osteoporosis. Iron exists in two dietary forms: heme iron (from animal sources, well-absorbed) and non-heme iron (from plant sources, less well-absorbed). Iron deficiency is the most common nutritional deficiency worldwide, particularly affecting women of reproductive age. Magnesium participates in over 300 enzymatic reactions and is involved in energy production, protein synthesis, and blood pressure regulation.

Potassium plays a crucial role in maintaining fluid balance, nerve transmission, and muscle contraction. Higher potassium intake is associated with lower blood pressure and reduced stroke risk. The 2019 updated Adequate Intake for potassium is 3,400 mg for adult males and 2,600 mg for adult females. Zinc supports immune function, protein synthesis, and wound healing, with deficiency impairing growth and immune response. Selenium is a key component of selenoproteins that protect against oxidative damage and support thyroid function.

Mineral bioavailability — the proportion actually absorbed and utilized by the body — varies significantly based on dietary factors. Vitamin C enhances non-heme iron absorption, while phytates (in whole grains and legumes) and oxalates (in spinach and rhubarb) can inhibit calcium and iron absorption. Calcium and iron compete for absorption, so supplements should be taken at different times. Use this calculator to identify your mineral targets and plan a diet that maximizes both intake and absorption through strategic food pairing.