Vitamin & Mineral Daily Needs Calculator

ANA›Life Services Authority›National Calculator Authority›Vitamin & Mineral Daily Needs Calculator

.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }

Vitamin & Mineral Daily Needs Calculator

Calculate your personalized daily recommended dietary allowances (RDAs) and adequate intakes (AIs) for essential vitamins and minerals based on your age, biological sex, and life stage, using the National Academies of Sciences Dietary Reference Intakes.

Age (years)

Biological Sex

Male Female

Life Stage

Normal / None Pregnant Lactating / Breastfeeding

Calculate

function vitCalc() { const ageRaw = document.getElementById('vit-age').value.trim(); const sex = document.getElementById('vit-sex').value; const life = document.getElementById('vit-life').value; const res = document.getElementById('vit-result');

// --- Validation --- if (ageRaw === '' || isNaN(ageRaw)) { res.innerHTML = 'Please enter a valid age.'; return; } const age = parseFloat(ageRaw); if (age 100 || !Number.isInteger(age)) { res.innerHTML = 'Age must be a whole number between 1 and 100.'; return; } if ((life === 'pregnant' || life === 'lactating') && sex === 'male') { res.innerHTML = 'Pregnant / Lactating options apply to females only.'; return; } if ((life === 'pregnant' || life === 'lactating') && age Pregnancy / Lactation life stage requires age ≥ 14.'; return; }

// --------------------------------------------------------------- // DRI lookup tables (RDA unless marked AI*) // Sources: National Academies DRI tables (2011 update + 2019 sodium) // Structure: [minAge, maxAge] → values // ---------------------------------------------------------------

// Helper: pick row from table [{min,max,val}] function pick(table, a) { for (const r of table) if (a >= r.min && a ${cat.cat}

Nutrient Amount Type

; for (const item of cat.items) { const isAI = item.note === 'AI*'; html += ${item.name}

${item.val} ${item.unit}

${item.note}

`; } html += ``; }

html += ` RDA = Recommended Dietary Allowance  |  AI* = Adequate Intake (used when RDA not established)

`;

res.innerHTML = html; }

#### Formula & Method

This calculator performs a direct table lookup against the official Dietary Reference Intakes (DRI) published by the National Academies of Sciences, Engineering, and Medicine. Each nutrient value is selected by matching the user's age bracket, biological sex, and life stage (normal, pregnant, or lactating) to the corresponding DRI table row:

DRI(nutrient) = Table[sex | life_stage][age_bracket]

Where age_bracket satisfies: min_age ≤ age ≤ max_age

RDA (Recommended Dietary Allowance): = EAR + 2 × SD (meets needs of ~97.5% of healthy individuals)

AI (Adequate Intake): = Observed/estimated intake assumed to be adequate (used when insufficient data exist to establish an EAR/RDA)

Key nutrient units: Vitamin A in µg RAE (Retinol Activity Equivalents); Vitamin D in µg (1 µg = 40 IU); Vitamin E in mg α-tocopherol; Folate in µg DFE (Dietary Folate Equivalents); Niacin in mg NE (Niacin Equivalents).

#### Assumptions & References

More Calculators

References

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