Micronutrient Calculator — Daily Vitamin & Mineral Intake vs RDA
Select a vitamin or mineral, enter your combined daily intake from food and supplements, and instantly see the percentage of the NIH Recommended Dietary Allowance (RDA) you are meeting and how close you are to the Tolerable Upper Intake Level (UL).
Nutrient
Sex
mg
RDA: 90 mg · Upper limit (UL): 2,000 mg
- 1
Recommended Dietary Allowance (RDA)
90 mg - 2
% of daily RDA
90 ÷ 90 × 100 = 100< 100% = below RDA; > UL = excess risk.
How does this calculator work?
% of RDA = (intake ÷ RDA) × 100. The RDA meets the needs of 97–98% of healthy adults; the UL is the safe maximum. Values are NIH DRI 2019–2020 for adults 19–50 (non-pregnant, non-lactating), used here as editable estimates. Exceeding the UL of fat-soluble vitamins (A, D, E) or minerals like iron and zinc carries genuine toxicity risk.
Formula
How this is calculated
Micronutrients are vitamins and minerals needed in small quantities for normal body function. The Recommended Dietary Allowance (RDA) is the daily intake sufficient to meet the needs of 97–98% of healthy individuals in a given age-sex group. Getting less than the RDA over time increases the risk of deficiency; however, the RDA already includes a safety margin and is not a minimum threshold. The Tolerable Upper Intake Level (UL) is the highest daily intake unlikely to cause adverse health effects — amounts above the UL carry increasing risk of toxicity. This calculator uses the NIH / National Academies DRI values for adults aged 19–50 (2011–2020 update, editable estimates).
Enter your total intake from all sources — whole foods, fortified foods, and supplements combined. The scale shows your intake as a percentage of the RDA: orange means below the RDA (deficiency risk if sustained), green means adequate (meets or exceeds RDA within the safe range), and red means above the UL (excess risk). For several nutrients the UL applies only to synthetic forms: the UL for niacin, folate, and magnesium covers supplements and fortified foods only — naturally occurring amounts in whole foods do not count toward the UL.
These values are population-level reference ranges, not personalised medical advice. Needs differ substantially for pregnancy and lactation (iron, folate, calcium, and vitamin D increase markedly), for adults over 70 (vitamin D rises to 800 IU, calcium to 1200 mg), and for people with malabsorption, chronic illness, or restricted diets. Consult a registered dietitian for individual guidance.
Frequently asked questions
The RDA (Recommended Dietary Allowance) is the daily amount sufficient to meet the needs of 97–98% of healthy people; it represents an adequate level, not a minimum. The UL (Tolerable Upper Intake Level) is the highest daily amount unlikely to cause adverse effects; regularly exceeding it increases toxicity risk. Aim to meet the RDA; treat the UL as a ceiling, not a target.
Enter your combined total from all sources — food, fortified foods, and supplements. However, the UL for niacin (B3), folate, and magnesium applies only to synthetic forms from supplements and fortified foods, not to naturally occurring amounts in whole foods. The calculator notes this distinction for each affected nutrient.
These values are for non-pregnant adults aged 19–50. Pregnancy substantially raises iron (to 27 mg), folate (to 600 µg DFE), and calcium needs. Adults over 70 need 800 IU vitamin D and 1200 mg calcium. Use the DRI calculator for age-specific values, or consult a registered dietitian for pregnancy-specific guidance.
Also known as
TG we-Calculate Editorial Team. (2026). Micronutrient Calculator — Daily Vitamin & Mineral Intake vs RDA [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/micronutrient-calculator
TG we-Calculate Editorial Team. "Micronutrient Calculator — Daily Vitamin & Mineral Intake vs RDA." TG we-Calculate. 2026. https://we-calculate.com/calculator/micronutrient-calculator.
TG we-Calculate Editorial Team, "Micronutrient Calculator — Daily Vitamin & Mineral Intake vs RDA," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/micronutrient-calculator
@misc{wecalculate_micronutrient_calculator, title = {Micronutrient Calculator — Daily Vitamin & Mineral Intake vs RDA}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/micronutrient-calculator}}, year = {2026}, note = {TG we-Calculate} }
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