Daily Vitamin Requirement Calculator
View daily vitamin and mineral reference amounts by age and gender. For women aged 18 to 59, you can also select pregnancy or lactation.
Daily Vitamin and Mineral Requirements
Daily Vitamin Requirement Formula
Where:
- \(R_n\) — the displayed daily reference amount for nutrient \(n\)
- \(T_n\) — the amount stored in the calculator’s reference table for nutrient \(n\)
- \(a\) — selected age group
- \(g\) — selected gender
- \(c\) — selected additional condition, if available
The calculator looks up each vitamin and mineral in a fixed table. It does not calculate an individual requirement from body weight, diet, or laboratory results.
Daily Vitamin Requirement – Calculation Example
Example: keep the default selections: Age is 1 to 3 months, Gender is Male, and no additional condition is selected. The calculator uses the infant age-group table.
\[R_{\mathrm{vitamin\ A}}=T_{\mathrm{vitamin\ A}}(\text{1 to 3 months})=400\ \mathrm{mcg}\]
\[R_{\mathrm{calcium}}=T_{\mathrm{calcium}}(\text{1 to 3 months})=400\ \mathrm{mg}\]
Result: the Vitamins table shows vitamin A at 400 mcg per day, and the Minerals table shows calcium at 400 mg per day. These are table lookups, not amounts to give an infant as supplements.
How to use the calculator
- Choose the appropriate range in Age. The available ranges run from 1 to 3 months through 75+ years.
- Select Male or Female in Gender. For children younger than 11 years, both selections use the same age-group table.
- If you selected Female and 18 to 59 years, use Additional to choose Pregnancy, Lactation, or —. This field is not available for other selections.
- Read the separate Vitamins and Minerals results. Check the unit beside each amount: mcg means micrograms, while mg means milligrams.
What daily vitamin and mineral requirements mean
Vitamins and minerals support functions such as growth, bone maintenance, blood formation, and normal metabolism. The calculator presents daily reference amounts for its broad age and gender groups, with separate pregnancy and lactation tables for women aged 18 to 59. It is a quick way to see which nutrients are listed and how the table changes between groups.
Each result is an amount per day, not a recommended supplement dose or a measurement of your current intake. A value such as 400 mcg of vitamin A refers to the amount shown in this calculator’s table. Where a result is a range, such as 50–55 mg, the table provides a range rather than one personalized target. The upper end is not a safe upper intake limit.
Daily intake comes from the whole diet, including foods, drinks, and any supplements. Meeting an energy goal does not automatically provide enough micronutrients: two meals with similar calories can differ substantially in nutrient content. For a broader view of eating patterns, you can compare this page with the Calorie of Food calculator, Daily Protein Intake calculator, and Daily Water Intake calculator.
Assumptions and practical limits
These figures come from the calculator’s built-in table, not a live dietary-guideline database. Nutrient recommendations differ by country, issuing organization, age definition, and the form of a nutrient being measured. Some displayed figures may differ from current guidance where you live. Use the results as general reference information, not as a clinical prescription or a substitute for locally applicable recommendations.
The calculator uses broad categories and does not ask about medical conditions, medications, dietary restrictions, absorption problems, or confirmed deficiencies. It also does not estimate how much of a nutrient you eat. Selecting an age group changes the table; it does not account for differences within that group. At a boundary between two age ranges, use the range intended for the person’s current age and consult age-specific guidance if the distinction matters.
Pay close attention to units. One milligram equals 1,000 micrograms, so 0.15 mg and 150 mcg represent the same quantity. Some nutrients appear in mg for one age group and mcg for another. The table also uses names such as “Chrome” and “Fluorine”; read them as the calculator’s displayed labels rather than assuming its terminology matches a particular nutrition standard.
For infants and children, do not turn a table value into a supplement dose. Feeding guidance depends on age, diet, and clinical circumstances. During pregnancy, take particular care with vitamin A and iron supplements: nutrient form and dose matter, and excess intake can be harmful. If you are pregnant, lactating, managing a medical condition, or considering supplements, ask a qualified healthcare professional which guidance applies to you.
Frequently Asked Questions
How can I estimate my daily vitamin and mineral intake by hand?
Add the nutrient amounts from everything you eat and drink in a day, including supplements. Use nutrition labels or a reliable food-composition database, and adjust each amount for the portion you consumed. For example, two servings of a food containing 3 mg of iron per serving provide 6 mg. Compare your total with an age-appropriate reference, but remember that recorded intake is only an estimate.
Does meeting the displayed amount mean my intake is healthy?
Not necessarily. A reference amount is useful for assessing a diet, but one day above or below it does not establish whether you have a deficiency. Intake varies across days, and factors such as absorption and health conditions matter. Look at your usual eating pattern rather than a single day. If you suspect a deficiency, ask a healthcare professional whether an assessment or blood test is appropriate.
Why does a food label show a different daily value?
Food-label percentages usually use a standardized Daily Value for labeling, not a target tailored to your age or pregnancy status. National guidelines may also use different age bands or definitions of a nutrient. To compare a label with this calculator, first convert its percentage into an amount using the Daily Value printed on the label, then check that both amounts use the same units and nutrient form.
How do I convert vitamin D between micrograms and IU?
For vitamin D, 1 mcg equals 40 international units (IU), so 10 mcg equals 400 IU. Divide IU by 40 to get mcg, or multiply mcg by 40 to get IU. Do not apply this conversion to other vitamins: IU conversions depend on the vitamin and, in some cases, its chemical form. Check supplement labels carefully before combining products.
Is the vitamin A amount directly comparable with vitamin A on a supplement label?
Only if the units and form are comparable. Nutrition guidance often expresses vitamin A as micrograms of retinol activity equivalents (mcg RAE), which account for differences between preformed vitamin A and carotenoids. A label may instead list IU or identify a particular form; a simple conversion may be misleading. High intakes of preformed vitamin A can be harmful, especially during pregnancy, so check with a clinician before supplementing.
Is vitamin B9 the same as folic acid?
Vitamin B9 is a general name for folate-related compounds; folic acid is a form commonly used in supplements and fortified foods. Recommendations may be expressed as dietary folate equivalents (DFE), which account for differences in absorption, so equal-looking microgram amounts are not always interchangeable. If you are planning a pregnancy or are pregnant, follow locally applicable folic acid guidance rather than treating the calculator’s B9 figure as a supplement instruction.
Should I take a multivitamin if my food intake falls below a listed amount?
A shortfall on one day does not automatically mean you need a supplement. First consider your usual intake over time and whether food choices can address the gap. Multivitamins vary in their ingredients and doses, and taking several products can lead to excessive intake of some nutrients. For children, pregnancy, medical conditions, or a suspected deficiency, seek individualized advice before starting a supplement.