Calorie & Macro Context Tool
Calorie & Macro Context Tool: Pick a food and a serving size in grams to scale its USDA FoodData Central per-100 g values, then see the calories, protein, carbs, fat and fiber for that portion. Everything runs in your browser and nothing is sent to a server.
Source: USDA FoodData Central. Data as of June 2026.
How it works
Choose a food and enter a serving size in grams. The tool multiplies the food's USDA per-100 g values by your serving (grams ÷ 100) to show calories, protein, carbohydrate, fat and fiber for that portion. Nothing leaves your device, and the result updates as you type.
These figures are reference values for raw or cooked foods as labelled on each food page. Cooking, draining and brand differences can shift the real numbers. This is general information, not medical or dietary advice.
Frequently asked questions
Is the calorie & macro context tool free?
Yes — it runs entirely in your browser, with no sign-up and no data sent to a server.
Where do the numbers come from?
Per-100 g values are from USDA FoodData Central. The tool simply scales them to your serving size; it does not add or estimate anything beyond that.
Is this nutrition advice?
No. NutriCompare provides general information only, not medical or dietary advice. Consult a qualified professional for personalised guidance.
Keep exploring
- Browse all foods with full per-100 g nutrient tables.
- Side-by-side comparisons of high-interest food pairs.
- Guides and explainers on reading nutrition data.
Last updated: 2026-06-14