Vitamin B12 Intake Calculator

Check vitamin B12 intake vs RDA — see mcg/day, % of RDA and food sources.

Vitamin B12 Intake Calculator

Check vitamin B12 intake vs RDA — see mcg/day, % of RDA and food sources.

Daily B12 (mcg)

Age

Enter values above and click Calculate — results will appear here with the formula explained.

RDA: 2.4 mcg 19+ (2.6 pregnancy, 2.8 lactation); % = intake/2.4*100

How does this work?

RDA for B12 is 2.4 mcg adults 19+, 2.6 pregnancy, 2.8 lactation. This checks intake vs RDA.

Meat, fish, dairy, eggs are sources. Vegans need fortified or supplement — deficiency causes anemia and neuropathy.

AdSense ready — add NEXT_PUBLIC_GOOGLE_ADSENSE_PUBLISHER_ID

728×90 — AdSense

Disclaimer: Results are estimates for informational purposes only and do not constitute professional medical advice.

Quick Answer

Vitamin B12 Intake Calculator: Check vitamin B12 intake vs RDA — see mcg/day, % of RDA and food sources. Formula: RDA: 2. Example: With 5mcg intake: RDA 2.

How to Use This Calculator

1Enter daily B12 mcg and age.
2Calculate to see % of RDA.
3If low and vegan, add fortified milk or supplement.

Formula Used

RDA: 2.4 mcg 19+ (2.6 pregnancy, 2.8 lactation); % = intake/2.4*100

RDA for B12 is 2.4 mcg adults 19+, 2.6 pregnancy, 2.8 lactation. This checks intake vs RDA.

Meat, fish, dairy, eggs are sources. Vegans need fortified or supplement — deficiency causes anemia and neuropathy.

AdSense ready — add NEXT_PUBLIC_GOOGLE_ADSENSE_PUBLISHER_ID

728×90 — AdSense

Worked Example

With 5mcg intake: RDA 2.4, 208% — more than enough, excess excreted.

AdSense ready — add NEXT_PUBLIC_GOOGLE_ADSENSE_PUBLISHER_ID

728×90 — AdSense

Related Calculators

Iron Intake Calculator

Check iron intake vs RDA by age and sex — see mg/day, % of RDA and heme vs non-heme tips.

Vitamin D Calculator

Estimate vitamin D from sun, food and supplements — see total IU, % of RDA and safe upper limit.

BMI Calculator

Calculate Body Mass Index from height and weight, with WHO category context.

BMR Calculator

Estimate basal metabolic rate — calories burned at complete rest.

Frequently Asked Questions

QHow much B12?

2.4 mcg adults, 2.6 pregnancy, 2.8 lactation.

QVegan?

Need fortified foods or 25-100mcg supplement, as plants have none.

QToo much?

No UL, water soluble. High dose safe.

Vitamin B12 Intake Calculator

Check vitamin B12 intake vs RDA — see mcg/day, % of RDA and food sources.