Serving Size & Nutrition Label Calculator

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Serving Size & Nutrition Label Calculator

Indian food labels (FSSAI Labelling & Display regulations) often show nutrients per 100 g or per serving. This calculator scales those figures proportionally to your actual portion, in either direction.

This is arithmetic for reading labels, not dietary advice. Your personal nutrition targets should come from a qualified professional.

Serving size converter

Convert nutrition-label values between "per 100 g" and your actual serving.

e.g. energy 486 kcal, protein 9.2 g, sodium 400 mg
grams (g)

Nothing you enter is stored. Results are computed on request and discarded.

Methodology & references

Per-100 g to serving: value × serving (g) ÷ 100. Per-serving to per-100 g: value × 100 ÷ serving (g).

References

Limitations

  • Only as accurate as the label you enter; rounding rules differ between countries.
  • Useful arithmetic only — it does not judge whether the food is a healthy choice.

How to use this calculator

  • Choose the conversion direction: from a per-100 g label value to your serving, or from a per-serving value back to per 100 g.
  • Enter the label value (energy, protein, sodium — any one figure at a time).
  • Enter the serving size in grams (or the package serving, depending on direction).
  • Press Calculate to get the scaled value.

Understanding your result

The calculator scales linearly: if you eat twice the label serving, you get twice the listed nutrients. Manufacturers round label values, so small differences after scaling are normal rounding effects.

Methodology & references

Per-100 g to serving: value × serving (g) ÷ 100. Per-serving to per-100 g: value × 100 ÷ serving (g).

Limitations

  • Only as accurate as the label you enter; rounding rules differ between countries.
  • Useful arithmetic only — it does not judge whether the food is a healthy choice.

Frequently asked questions

How do I convert a nutrition label to my portion?

Enter the label value and the serving size it refers to, then your actual portion; the calculator scales the arithmetic proportionally.

Is this dietary advice?

No. It is arithmetic for reading food labels. Your individual dietary targets should come from a qualified professional.

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