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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.

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.

Shipped
Free to use, no watermarks, runs in your browser—nothing uploads to our servers

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.

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.

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