Nutrition Calculators
Free tools to help you calculate your nutritional needs, track calories, and reach your health goals.
BMI Calculator
Calculate your Body Mass Index (BMI) and find your weight category. Free, accurate calculator with imperial and metric units.
- ✓Height & weight input
- ✓BMI category classification
- ✓Health recommendations
Calorie Calculator
Calculate Total Daily Energy Expenditure (TDEE) and BMR. Get personalized calorie targets for weight loss, maintenance, or muscle gain.
- ✓BMR calculation
- ✓Activity level adjustment
- ✓Goal-based recommendations
Macro Calculator
Calculate ideal protein, carbs, and fat intake. Customized macro targets for your fitness goals.
- ✓Protein/carb/fat breakdown
- ✓Per-meal targets
- ✓Food examples
Meal Planner
Plan meals to hit your calorie and macro targets. Select foods and see real-time totals.
- ✓Select foods
- ✓Track totals
- ✓Save meal plans
Meanwhile, Explore Our Food Database
Browse nutrition information for over 300,000 foods and compare any foods side-by-side to make informed dietary choices.
Frequently Asked Questions
How accurate are online calorie calculators?
Calorie calculators use scientifically validated formulas like the Mifflin-St Jeor equation to estimate your daily energy needs. While they provide a good starting point, individual factors like genetics, muscle mass, and metabolic efficiency can cause variations of 10-15%. Use calculator results as a starting point and adjust based on your actual results over 2-4 weeks.
What is the difference between BMI and body fat percentage?
BMI (Body Mass Index) is a simple height-to-weight ratio that provides a general health classification. Body fat percentage measures the actual proportion of fat in your body. BMI is easier to calculate but does not distinguish between muscle and fat, which is why athletic individuals may have a high BMI but low body fat. Body fat percentage is more accurate but requires specialized measurement tools.
How do I calculate my macros for weight loss?
For weight loss, start with our calorie calculator to determine your daily calorie needs, then subtract 500-750 calories for a sustainable deficit. A good macro split for weight loss is typically 30-35% protein (to preserve muscle), 35-40% carbohydrates (for energy), and 25-30% fat (for hormones and satiety). Our macro calculator can provide personalized recommendations based on your goals.
How often should I recalculate my calorie needs?
Recalculate your calorie needs every 10-15 pounds of weight change, or every 2-3 months if you are actively trying to change your body composition. As you lose weight, your body requires fewer calories. If progress stalls for more than 2 weeks, recalculate your TDEE and adjust your calorie target accordingly.
What is TDEE and why does it matter?
TDEE (Total Daily Energy Expenditure) is the total number of calories you burn each day, including your basal metabolic rate plus all physical activity. It matters because eating below your TDEE creates a calorie deficit for weight loss, while eating above it leads to weight gain. Knowing your TDEE is essential for any weight management goal.
About Our Nutrition Calculators
Our suite of nutrition calculators is designed to help you understand your body's needs and make informed decisions about your diet. Whether you're trying to lose weight, gain muscle, or simply maintain a healthy lifestyle, these tools provide the data you need.
Why Use Nutrition Calculators?
Understanding your nutritional needs is the first step toward achieving your health goals. Our calculators help you determine your daily calorie requirements, optimal macronutrient ratios, and track your progress over time.
How Our Calculators Work
Our calculators use scientifically validated formulas including the Mifflin-St Jeor equation for BMR calculation and activity multipliers for TDEE estimation. We provide personalized recommendations based on your age, gender, height, weight, and activity level.