Get your numbers. Plan your diet.
10 free calculators and 40 evidence-based diet guides. No account needed.
Browse diets · All calculators · My saved results
Not sure where to start? Find your calculator.
What is DietaBest
DietaBest is your one-stop place for daily calorie and diet planning — without sign-up, without the clutter. We combine science-based calculators (BMR, TDEE, calorie deficit, macros, BMI, WHR) with 40 evidence-based diet guides, so you get both your numbers and a clear plan. Whether you want to lose weight, maintain, or gain — you start with one number, then choose how to eat.
Everything here is free and designed to work in your browser: we don’t store your data on our servers. Use My saved results to keep your results in one place, or jump straight into any calculator or diet guide.
How it works
- Get your number — Use our calorie, TDEE, or BMR calculator to find out how many calories you need. Add activity level and goal (lose, maintain, gain) and get a daily target in seconds.
- Plan your diet — Pick a diet guide that fits you (weight loss, Mediterranean, keto, DASH, and 36 more). Each guide explains what to eat and how to start; pair it with your calorie target for a plan that works.
- Stay on track — Save your results to My saved results (stored only in your browser), use our product calorie calculator or calorie table to plan meals, and come back anytime — no account needed.
Free calculators
Get your daily calories, BMR, TDEE, macros, BMI, WHR — or plan meals with our product and calorie table tools. Each calculator uses trusted formulas (like Mifflin-St Jeor for BMR and TDEE) and gives you a clear result plus what to do next.
Daily calories & macros
Body check
Plan meals
Which calculator do I need? · All calculators · My saved results
40 diet guides
One place for evidence-based diet guides — from weight loss and Mediterranean to keto and DASH. Each guide explains what the diet is, what to eat, and how to start; you can pair any of them with our calorie calculator to fit your daily target. No fads, no paywalls: just clear, practical information to help you eat better.
Browse all 40 diet guides or start with Weight loss diet, Mediterranean diet, or Keto diet.
Why DietaBest
Everything in one place
10 calculators and 40 diet guides so you can get your numbers and your plan without leaving the site. No jumping between apps or tabs.
Science-based
We use trusted formulas like Mifflin-St Jeor for BMR and TDEE; our diet guides are evidence-based and cite where it matters.
Free and private
No sign-up required. With my saved results, your results stay in your browser, not on our servers. We don’t sell your data.
Clear next steps
Each calculator tells you what to do with your result — from setting a deficit to choosing a diet. No dead ends.