Free Nutrition Calculator Tools

FOR PROFESSIONALS ONLY

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Free calculators for BMI, BMR, and TDEE using the Harris-Benedict, Mifflin-St Jeor, Katch-McArdle, and Schofield equations, plus protein intake recommendations. These tools are a free subset of NutriAdmin, practice-management software for nutritionists, coaches, and personal trainers.

Formula variables

These fields are used to populate data for the free nutrition calculator tools on this site.

Please enter weight, height, age, body fat percentage and gender below to calculate BMR using all BMR formulas

Nutrition calculator results

Formula	Value	Comments
BMI (Body Mass Index)	-	Weight (kg) divided by height squared (m)
BMR (Basal Metabolic Rate)	-	Harris/Benedict Equation
Weight maintenance level	-	BMR (Harris/Benedict) × Activity Level
BMR (Basal Metabolic Rate)	-	Mifflin and St Jeor Equation
Weight maintenance level	-	BMR (Mifflin and St Jeor) × Activity Level
BMR (Basal Metabolic Rate)	-	Katch-McArdle Formula
Weight maintenance level	-	BMR (Katch-McArdle) × Activity Level
BMR (Basal Metabolic Rate)	-	Schofield Equation
Weight maintenance level	-	BMR (Schofield) × Activity Level
PA values for different physical activity	-	BMR (Katch-McArdle) × Adjusted Activity Level
DRI for Protein (body weight)	-	DRI as a function of body weight
Protein recommendation based on lean body mass	-	More accurate than DRI if LBM is known

Business & Marketing free tools for nutritionists

How to build a free website for nutritionists- an article explaining how to do this in Wordpress for free, or minimal cost
Business free guides for nutrition professionals- our free in-depth guides on how to get more customers, grow your practice, and expand the reach of your brand.
Marketing for nutritionists– An introduction for any nutritionist or wellness professional that wants to get more clients
SEO and content strategy for nutritionists– a free comprehensive guide on how to get started with growing your client base using content, and Search Engine Optimization.

Related free nutrition calculator tools (or paid tools with free options)

NutriAdmin integrates with all of these services

Meal plan generator- You can generate a meal plan for free based on macros with our interactive tool.
Recipes database- You can query the recipes database to get a sample recipe for free with our interactive tool.
Spoonacular'sNutrition API- a large database of food and recipes with extensive nutrition information.
USDA Food Composition Databases- food database with US products.
AUSNUT food database- Australian food products database

Frequently asked questions

What free nutrition calculator tools does NutriAdmin offer?: NutriAdmin offers free BMI, BMR, and TDEE calculators for nutrition professionals. You can calculate body mass index, basal metabolic rate using multiple equations (Harris-Benedict, Mifflin-St Jeor, Katch-McArdle, Schofield), and total daily energy expenditure with activity levels.
Are NutriAdmin calculator tools free to use?: Yes. All NutriAdmin nutrition calculator tools are free to use with no sign-up required. Calculations run in your browser and client data is not stored on NutriAdmin servers.