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Age, sex, height, weight, and activity—or import your previous results to save time.
🔥Professional Nutrition Toolkit
Master Your Nutrition with Precision Calculators
From calorie planning to macro optimization, our comprehensive suite of 22+ calculators provides lab-grade insights for coaches, dietitians, and health enthusiasts.
22+
Pro Calculators
15K+
Monthly Calculations
98%
User Satisfaction
⚡
Fast & Accurate
Science-backed formulas
How it works
Enter a few details → get science-based results → take action with connected tools.
Get results
TDEE, macros, BMI/body fat, hydration—with clear explanations, ranges, and tips.
Take action
Plan meals, log foods, export/share summaries, and follow recommended next steps.
Why Choose Our Calculator Suite?
Built for professionals, designed for everyone. Accurate formulas, clean UI, and seamless workflows.
Scientific Accuracy
We implement research-backed methods used by healthcare professionals.
- TDEE (Mifflin-St Jeor / activity multiplier)
- Body fat (US Navy & Jackson-Pollock)
- Goal-based macro splits
- Hydration adjusted for climate/activity
Integrated Workflow
Food search → meal planning → daily tracking. Everything connects.
- Cross-calculator data sharing
- One-click add to meals/tracker
- Automatic macro rollover
- Persistent daily tracking
Effortless UX
Mobile-first layout, instant results, clear explanations for every output.
- Step-by-step flows
- Accessible components (A11y/contrast)
- Export & share results
- Unit switching (metric/imperial)
Built on Science & Privacy
Our calculators use validated formulas: Mifflin-St Jeor, Harris-Benedict, US Navy, and Jackson-Pollock. Guided by NIH Body Weight Planner and USDA FoodData. All calculations run in your browser—100% privacy-friendly.
Scientific Nutrition Tips
Evidence-based recommendations to help you make informed nutrition decisions
Protein Timing Matters
Consuming 20-40g of protein within 2 hours post-workout maximizes muscle protein synthesis. Spread protein intake evenly throughout the day.
Hydration Beyond Water
Include sodium, potassium, and magnesium in your hydration strategy—especially during intense exercise or hot weather.
Fiber for Gut Health
Aim for 25-38g of fiber daily from diverse sources; increase gradually and drink enough water.
Metabolic Flexibility
Train your body to use both carbs and fats efficiently to improve energy, body composition, and health.
Sleep & Nutrition
Poor sleep disrupts hunger hormones and increases cravings; aim for 7–9 hours nightly.
Micronutrient Density
Prefer nutrient-dense foods: colorful vegetables, lean proteins, whole grains, legumes, nuts, and seeds.
See Our Calculators in Action
Complete Calculator Library
Every tool you need for comprehensive nutrition and fitness planning. Click any calculator to use it directly.
Calorie & Energy
Macro & Nutrition
Body Composition
Food & Tracking
Hydration & Lifestyle
Understanding TDEE
TDEE = BMR × Activity Multiplier. We calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation, then apply your activity level. See TDEE Calculator and Activity Level.
Export & Share Your Results
Download a clean PDF or copy a shareable summary for clients and teammates.
What our users say
Coaches, dietitians, and athletes rely on our calculators every day.
"The quickest way to get accurate macros for my clients. I use it daily and my clients love the clear, printable results!"
"Love the exportable summaries and clean UI. Perfect for client handouts and progress tracking."
"TDEE + meal planning flow saves me hours weekly. Game changer for my coaching business!"
"Accurate, science-based, and easy to use. My go-to tool for all client nutrition planning."
"Finally, calculators that actually match the research. The body fat calculator is incredibly accurate."
"Best nutrition calculator suite I've found. Clean interface and scientifically sound results every time."
Latest from Our Blog
Evidence-based articles, nutrition guides, and practical tips
Ready to Transform Your Nutrition Planning?
Join thousands of health professionals and enthusiasts who rely on our calculators for accurate, science-based nutrition planning.
Frequently Asked Questions
Quick answers about accuracy, formulas, exporting results, and more.
How accurate are the calculators?
We implement research-backed formulas (e.g., Mifflin-St Jeor for TDEE; US Navy & Jackson-Pollock for body fat). Where variability exists, we present ranges and context.
Can I use results with clients?
Yes. You can copy, export, or screenshot the result summaries and share them with clients.
Do you support different diet styles (keto, high-protein, etc.)?
Absolutely. Macro targets can be adjusted for keto, balanced, high-protein, and custom targets.
Are the tools mobile-friendly?
The UI is mobile-first and fully responsive. All components pass accessible contrast checks in both light and dark themes.
Can I track daily intake over time?
Yes—use the Food Search, Meal Counter, and Daily Tracker to log intake and compare trends.
Will you add more calculators?
We iterate continuously. If there's a specific tool you want, send us a request via the Contact page.
Do you offer unit options (metric/imperial)?
Yes. Most calculators let you switch units instantly without recalculating data manually.
Is there a quick start guide?
Yes—see the Quick Start Guide for recommended flows (e.g., TDEE → Macro → Meal Planning → Tracker).