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Vitamin D Dosage Calculator

Estimate a safe daily vitamin D amount from your age, body size, current level, and target level.

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Try this first

  • Start by entering age (years) and then complete the remaining inputs from left to right.
  • Need clarification? Use each field hint below for what each input expects.
  • Press the action button when your values are complete to run the calculation.

Inputs

Set assumptions

Manual run

Use full numbers for timeline values unless the tool explicitly supports decimals.

Select one weight unit option that matches your assumptions.

Select one lab unit option that matches your assumptions.

Select one average sun exposure option that matches your assumptions.

Result

Ready when values are complete

Fill the required fields, then run the calculator to see the payoff.

Assumptions

+3 more
Age (years)
30
Weight
70
Weight unit
kg
Current vitamin D level (optional)
Not set

Recent inputs

Local only

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What this tool does

Vitamin D Dosage Calculator helps you estimate a safe daily vitamin D amount from your age, body size, current level, and target level.

What you get

Vitamin D Dosage Calculator produces a direct output in this page and keeps all processing on your device, with nothing uploaded to our servers.

Report a bug

If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.