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.

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

What is Vitamin B12 Intake?

RDA for B12 is 2.4 mcg adults 19+, 2.6 pregnancy, 2.8 lactation. This checks intake vs RDA. Formula: RDA: 2.4 mcg 19+ (2.6 pregnancy, 2.8 lactation); % = intake/2.4*100

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.

What it does: Check vitamin B12 intake vs RDA — see mcg/day, % of RDA and food sources.
Formula: RDA: 2.4 mcg 19+ (2.6 pregnancy, 2.8 lactation); % = intake/2.4*100
Inputs: Daily B12 (mcg) · Age
Example: With 5mcg intake: RDA 2.

Calculator Inputs at a Glance

Field	What to enter
Daily B12 (mcg)	e.g. 5
Age	e.g. 30

All fields use the exact formulas shown below — results include step-by-step breakdowns you can verify by hand.

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.

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Worked Example

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

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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.

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.

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

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

Inputs: Daily B12 (mcg) · Age

Example: With 5mcg intake: RDA 2.

Field

What to enter

Daily B12 (mcg)

e.g. 5

Age

e.g. 30