Nutrition Calculator — Food Analysis

Use the Nutrition Calculator

Analyze any food with our food nutrition calculator. See calories, macros, and 13 vitamins & minerals per serving. Search 50+ foods, filter by category, and track your daily totals.

Start analyzing a food

How to Use Nutrition Calculator — Food Analysis

1. Step 1: Search or filter foods

   Type a food name in the search bar or tap a category pill (Protein, Grains, Fruit, etc.) to narrow the list. Select a food to see its per-100g breakdown.

2. Step 2: Set serving size in grams

   Enter the exact gram weight in the Grams field, or tap +50 to adjust quickly. The preview updates instantly.

3. Step 3: Add to your food list

   Press Add to list to include the food. You can edit grams inline or remove any item at any time.

4. Step 4: Review macro and micro totals

   See total calories, protein, carbs, and fat with a color-coded split bar. Tap any item to view its vitamin and mineral profile.

5. Step 5: Check total micronutrients

   Scroll to the Total Vitamins and Minerals panel to see combined percentages of Daily Value across all your foods.

6. Step 6: Set daily targets (optional)

   Open Daily targets to estimate your TDEE and macro goals, then compare your intake against progress bars.

Key Features

• 50+ foods with USDA-sourced macro and micro data
• 13 vitamins and minerals with % Daily Value
• Category filter pills for quick food search
• Color-coded macro split bar and per-item detail
• Daily calorie and macro targets with progress bars
• Copy summary, custom food entry, and mobile sticky bar

Understanding Results

Formula

The calculator uses proportional math based on per-100-gram values. If a food provides 130 kcal per 100 g and your serving is 150 g, calories are 130 × (150 ÷ 100) = 195 kcal. The same scaling applies to protein, carbohydrates, fat, fiber, sugar, sodium, and all 13 tracked micronutrients. Energy from macronutrients follows the common convention: protein ≈ 4 kcal/g, carbohydrates ≈ 4 kcal/g, and fat ≈ 9 kcal/g. Totals are the sum of all items you add.

Reference Ranges & Interpretation

For macronutrients: protein intake typically falls between 1.2–2.2 g/kg/day depending on goals and activity. Dietary fat commonly spans 20–40% of total calories. Fiber intakes of roughly 25–38 g/day support digestion and fullness. For micronutrients, percentages are based on FDA Daily Values: for example, 18 mg/day for iron, 1,300 mg/day for calcium, and 4,700 mg/day for potassium. For label reading guidance, see the U.S. FDA consumer guide.

When you enable Daily targets, the tool estimates maintenance calories (TDEE) from the Mifflin–St Jeor equation and your activity level, then applies your goal (maintain, deficit, or surplus). Protein is set in grams per kilogram of body weight; fat is a percentage of calories; remaining calories are carbohydrates. The progress bars compare your totals to those targets in real time.

Assumptions & Limitations

Nutrition values vary by brand, recipe, and cooking method. Raw versus cooked weight changes the numbers per gram because water content shifts. Micronutrient data is sourced from USDA reference values and may differ from your specific product. Restaurant dishes can be difficult to estimate precisely; use reasonable approximations and aim for consistency over time. This tool provides calculations only and does not offer medical advice. For specific dietary guidance or clinical conditions, consult a qualified professional.

Complete Guide: Nutrition Calculator — Food Analysis

A good nutrition calculator turns a confusing food label into numbers you can actually use. This one breaks down any food or meal into calories, protein, carbs, fat, fiber, sugar, sodium, and key vitamins and minerals—all from a single search bar. Whether you're weighing chicken breast on a kitchen scale or eyeballing a bowl of oatmeal, the math behind your plate shouldn't feel like guesswork.

Below you'll find how the calculator works, what the numbers mean, and how to pair macro tracking with micronutrient awareness for a more complete picture of what you eat. If you've ever wondered why two people eating the "same" meal end up with wildly different nutrition totals, this guide explains exactly that.

What this nutrition calculator does

Most food trackers bury you in menus. This tool takes a different approach: search a database of 50+ common foods, tap to select, set your grams, and see instant results. Every item shows calories, all three macronutrients, plus fiber, sugar, and sodium per serving. Add multiple foods and the calculator sums everything into a running total with a color-coded macro split bar.

The micronutrient panel is what sets it apart. Tap any food in your list to see its vitamin and mineral profile—Vitamin A, C, D, E, K, B6, B12, folate, calcium, iron, magnesium, potassium, and zinc—each shown as a percentage of the FDA Daily Value. A combined total for all your foods appears below the list, giving you a snapshot of your overall micronutrient intake without opening a second app.

Category filter pills let you jump straight to protein sources, grains, fruits, vegetables, dairy, nuts, legumes, or seafood. If your food isn't in the database, the custom entry form takes per-100g values from any package label and handles the serving math automatically.

How the tool calculates calories, macros, and micros

All per-serving values come from proportional math based on per-100g data. Here's a worked example: cooked white rice provides 130 kcal, 2.4g protein, 28.2g carbs, and 0.3g fat per 100g. You serve yourself 200g. The calculator multiplies each nutrient by 2.0 (200 / 100):

Energy conversion follows the standard convention: protein and carbohydrates each supply roughly 4 kcal per gram, fat supplies about 9 kcal per gram. Micronutrients scale the same way—if 100g of spinach contains 469 mcg of Vitamin A (52% DV) and you eat 50g, you get about 235 mcg (26% DV). For a clear introduction to food labels and daily values, the FDA's consumer guide is a solid starting point.

Micronutrients: vitamins and minerals your body needs

Macros get all the attention, but micronutrients do most of the behind-the-scenes work. Iron carries oxygen in your blood. Calcium builds bone. Vitamin D helps you absorb that calcium. Folate is critical during pregnancy. Potassium keeps your heart rhythm steady. The problem? Most people have no idea how much they're actually getting from food.

This food nutrition calculator tracks 13 micronutrients across your meal. Each one shows a percentage of the FDA Daily Value, making it easy to spot gaps. A few practical examples:

• 100g of spinach delivers 483 mcg of Vitamin K (402% DV) and 2.7mg of iron (15% DV)
• One hard-boiled egg (about 50g) provides 1.1 mcg of Vitamin D (roughly 5.5% DV)
• 100g of almonds packs 25.6mg of Vitamin E (171% DV) and 270mg of magnesium (64% DV)

Seeing these numbers adds a dimension that calorie counting alone misses. Someone eating 2,000 kcal of processed snacks and someone eating 2,000 kcal of whole foods will look identical on a macro tracker—but their vitamin and mineral intake will be drastically different. That's why tracking both macros and micros together gives a more honest picture. If you want to go deeper on overall dietary balance, the Dietary Guidelines for Americans outline recommended intakes by age and sex.

Set daily calorie and macro targets

Numbers without context are just numbers. The daily targets section estimates your maintenance calories using the Mifflin-St Jeor equation, then factors in your activity level and goal (maintain, deficit, or surplus). You set a protein target in grams per kilogram of body weight and a fat percentage of total calories. Remaining calories go to carbohydrates. As you add foods, progress bars compare your running intake to those targets in real time.

For a more detailed estimate of energy expenditure, our TDEE calculator breaks down maintenance calories across multiple equations. The macro calculator helps you plan protein, carb, and fat splits for different diet styles, and the protein calculator zeroes in on daily protein needs based on your training goals and lean mass.

Serving sizes and food variability

"One serving" on a package can mean almost anything. A "serving" of peanut butter is 32g—roughly two tablespoons. Most people use closer to 50g and wonder why the calories don't match. This nutrition calculator sidesteps the confusion by using grams as the universal base unit. You control the exact amount.

Raw versus cooked weight matters more than most people realize. Chicken breast loses about 25% of its weight when cooked (water evaporating), which means 100g of cooked chicken breast has more protein per gram than 100g raw. Rice absorbs water during cooking, so 100g of cooked rice contains fewer calories than 100g dry. Pick one convention—either always weigh raw or always weigh cooked—and stick with it. Consistency beats precision for long-term tracking.

Plan meals step by step

Here's a practical workflow that works whether you're meal prepping for the week or building a plate on the fly:

1. Anchor with protein. Search for your main protein source (chicken, tofu, salmon, eggs) and add it first. Protein is the hardest macro to hit and the most satiating.
2. Add a carb source. Rice, potato, quinoa, pasta—pick one. Adjust grams until calories look right.
3. Fill with produce. Vegetables add volume, fiber, and micronutrients without blowing up the calorie count. Broccoli, spinach, and bell peppers are nutrient-dense picks.
4. Finish with fats. Olive oil, avocado, nuts. These are calorie-dense, so small adjustments make a big difference.
5. Check the split. Look at the macro bar. If protein is below 25-30%, bump the protein source. If calories are too high, trim the densest item first (usually oils or nuts).

For full recipe analysis with ingredient lists and per-serving breakdowns, the recipe nutrition calculator handles multi-ingredient dishes. If you're focused on daily energy balance, the calorie calculator shows how intake compares to expenditure over time.

Weight loss, muscle gain, and maintenance

Different calorie targets, same food quality principles. For fat loss, a 10-20% calorie deficit maintained consistently outperforms aggressive cuts that last two weeks before a rebound. For muscle gain, a 10-15% surplus with adequate protein (1.6-2.2 g/kg) and progressive resistance training is the evidence-based approach. Maintenance sits in between: eat near your TDEE and keep protein steady.

In all cases, protein adequacy matters more than perfection on any single day. A systematic review in the British Journal of Sports Medicine (2018) found that protein intake above 1.6 g/kg/day didn't produce significant additional muscle gain in trained individuals. That doesn't mean higher is harmful—it just means hitting 1.6-2.0 g/kg is the practical sweet spot for most people.

For a dedicated deficit planner, try the weight loss calorie calculator. If you follow low-carb or keto, the keto macro calculator builds your plan with carb limits built in.

Best practices for accurate tracking

Track one meal per day for a week before committing to logging everything. That single meal reveals patterns: most people underestimate fats and overestimate protein. Use a kitchen scale when you can—eyeballing a "tablespoon" of oil versus actually measuring it can differ by 50+ calories. When eating out, estimate conservatively and focus on the protein anchor plus visible fats. Don't stress the fiber or sodium numbers on a restaurant meal; those are impossible to pin down without a recipe.

Save your most-used foods as custom entries so you're not re-entering label data every day. And focus on trends over single days. One high-calorie meal doesn't derail a week of consistent intake—the weekly average is what moves the needle.

Common food nutrition reference table

This reference table shows macronutrient values per 100g for frequently searched foods. Use it as a quick lookup when you don't have a label handy:

Values are based on USDA data and serve as general reference points. Your specific brand or preparation method may differ, so always defer to the label on your product when available.

Limitations and responsible use

Nutrition values are estimates. Different brands, seasons, soil quality, and cooking methods all shift the numbers. Packaged foods change formulations over time, and fresh produce varies by variety and ripeness. The micronutrient data in our database comes from USDA reference values—your actual intake could be higher or lower depending on the specific product.

This food nutrition calculator is a planning tool, not medical advice. If you have a diagnosed deficiency, kidney disease, or any condition that requires precise nutrient management, work with a registered dietitian who can run lab-based assessments. Our goal is to make the math transparent so you can make informed choices—not to replace clinical care.

Ready to explore more tools? Browse the full collection on the calculators index or the Nutrition & Diet category. Small, consistent steps compound—this calculator helps you keep them visible.

Frequently Asked Questions