Nutrition tools that actually make sense.
Use our full library of nutrition calculators with clear formulas. Search real foods with full nutrition data. Plan meals, track progress, and get practical guidance from an AI nutrition coach. Create a free account to save your diary, sync across devices, and keep your streak going.
What are you working toward?
Pick a goal and get the right calculators, guides, and tracking tools for it.
Lose Weight
Calorie deficit calculators, macro targets, and progress tracking for sustainable weight loss.
View tools →Build Muscle
Protein targets, caloric surplus, and training calculators for building lean mass.
View tools →Maintain & Thrive
Maintenance calories, hydration tracking, and micronutrient coverage for everyday balance.
View tools →Manage a Condition
Tools for diabetes, heart health, pregnancy, and more. Always talk to your doctor about your specific needs.
View tools →Apps for tracking, planning, and comparing
The tools work together: log meals, plan your week, compare foods, and track progress. Your data stays in your browser unless you create an account.
Food Diary
Log meals, track macros with visual rings, and see weekly trends. Works locally, syncs with an account.
OpenMeal Planner
Build multi-day meal plans from the food database, auto-calculate macros, export shopping list.
OpenRecipe Analyzer
Paste any recipe's ingredient list. We parse quantities, look up nutrition, compute per-serving macros.
OpenFood Comparison
Compare 2-5 foods across seven key nutrients, the winner of every row highlighted.
OpenProgress Tracker
Log weight, body fat %, and measurements. Visualize trends with charts and goal lines.
OpenBarcode Scanner
Scan a product barcode with your phone camera → instant nutrition lookup → add to diary.
OpenCustom Foods
Create custom food entries with full macro panel. Saved to your browser, searchable in diary.
OpenFood Database
Search real foods with full macros, vitamins, and minerals, sourced from USDA FoodData Central with the source shown on every entry.
OpenNutrition articles you can trust
Each article cites primary research, not opinions. Written to be useful, not to fill space.
Creatine Monohydrate: The Most Researched Supplement in History
Creatine is the most studied sports supplement ever, with over 500 studies. Here's what the evidence says about safety, dosing, and brain benefits.
Read article →Best Protein Sources Ranked by Quality, Cost, and Convenience
Not all protein is created equal. We ranked 20 protein sources by biological value, leucine content, cost per 25g protein, and preparation time.
Read article →Ultra-Processed Foods: What They Are, Why They're Harmful, and How to Avoid Them
The 2025 Dietary Guidelines warn against ultra-processed foods more strongly than ever. Here's what counts as UPF and how to cut back without going crazy.
Read article →Your Gut Microbiome: How It Shapes Your Health and What to Eat About It
The gut microbiome is one of the most exciting frontiers in nutrition science. Here's what the latest research says about fiber, fermented foods, and gut diversity.
Read article →Nutrition glossary
Clear definitions for every nutrition term, from BMR to visceral fat. Search and filter by category.
Browse glossary →