Folic Acid Intake Calculator

Health Updated 14 Jun 2026

Folic acid intake calculator for pregnancy planning and prenatal care. Recommended folic acid dosage varies by life stage: 400 µg daily for general adults, 5 mg (5000 µg) for high-risk pregnancies with history of neural tube defects or diabetes. Start supplementation at least 1 month before conception.

Formula

Dose depends on life stage; 400 µg standard, 5 mg for high-risk pregnancies.
  • Folic Acid Intake Calculator gives you a fast estimate using your inputs and updates instantly when you change any value.
  • Formula: Dose depends on life stage; 400 µg standard, 5 mg for high-risk pregnancies.
  • Enter values using the units shown next to each input field (e.g. kg, cm, years).
  • This calculator uses widely accepted health formulas and returns screening estimates only. It does not replace a diagnosis from a qualified healthcare professional.
  • Compare your result with published reference ranges. Values outside the normal range warrant a conversation with your doctor.
  • Practical tip: test a low, medium, and high scenario to understand sensitivity before making decisions.

Example Calculation

Suppose you enter: your chosen values. The calculator applies the formula (Dose depends on life stage; 400 µg standard, 5 mg for high-risk pregnancies.) and shows all output values below. Change any input field to immediately see how the result changes.

Frequently asked questions

Why is folic acid important in pregnancy?
Folic acid (B vitamin) reduces the risk of neural tube defects (spina bifida, anencephaly) by up to 70%. It's crucial during the first 28 days of pregnancy, often before a woman knows she's pregnant, so preconception supplementation is recommended.
When should I start taking folic acid?
Start at least 1 month before trying to conceive and continue through the first 12 weeks of pregnancy. Women of childbearing age should maintain 400 µg daily.
What if I have a higher-risk pregnancy?
If you have a history of neural tube defect, diabetes, or certain medications, ask your doctor about high-dose folic acid (5 mg/day), which may be recommended 3 months preconception.
Can I get enough folic acid from food?
Fortified grains, leafy greens, legumes, and citrus contain folate, but supplementation during preconception/pregnancy ensures adequate levels (bioavailability of synthetic folic acid is higher than food folate).
Does folic acid interact with other supplements or medications?
Some medications (antiepileptics, methotrexate) deplete folate. Always review with your doctor before supplementing, especially if taking other meds.

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