🥗Nutrition Calculators - Calories, Macros, Protein & TDEE
Nutrition planning works best when it starts with your actual metabolic needs rather than generic advice. Our nutrition calculators compute your TDEE, optimal macro splits by goal, protein requirements, and micronutrient targets based on validated formulas so your diet plan is built on real data.
TDEE Calculator — Total Daily Energy Expenditure
Calculate your Total Daily Energy Expenditure (TDEE) — the number of calories your body burns each day. Enter your stats and activity level to get your personalized daily calorie target for weight loss, gain, or maintenance.
Use Calculator →Macro Calculator — Protein, Carbs & Fat Targets
Calculate your daily protein, carbohydrate, and fat targets in grams based on your calorie goal and diet approach. Whether you're cutting, bulking, or maintaining, this calculator gives you your exact macro breakdown.
Use Calculator →Calorie Deficit Calculator
Calculate exactly how many calories you need to eat daily to reach your weight loss goal. This calculator shows your deficit, projected weekly loss rate, and how long it will take to hit your target weight.
Use Calculator →Protein Intake Calculator
Find out exactly how much protein you need per day. This calculator uses evidence-based recommendations adjusted for your weight, activity level, and goal — whether you're trying to lose fat, maintain, or build muscle.
Use Calculator →Intermittent Fasting Window Calculator
Calculate your precise eating and fasting windows for any intermittent fasting protocol. Enter your last meal time and fasting duration to see exactly when your next eating window opens.
Use Calculator →Body Fat Percentage Calculator — Navy Method
Calculate your body fat percentage using the US Navy method, which uses circumference measurements at the waist, neck, and hips. This method is more accurate than BMI for body composition assessment.
Use Calculator →Lean Body Mass Calculator
Calculate your lean body mass (LBM) — the weight of everything in your body except fat, including muscle, bone, water, and organs. Lean mass is the key metric for nutrition and training programs.
Use Calculator →Daily Water Intake Calculator
Find out exactly how much water you should drink each day. This calculator factors in your body weight, activity level, and environment to give you a personalized daily hydration target.
Use Calculator →One Rep Max Calculator
Calculate your theoretical one-rep maximum (1RM) for any lift using the Epley formula. Enter the weight you lifted and how many reps you completed to find your max.
Use Calculator →BMR Calculator — Basal Metabolic Rate
Calculate your Basal Metabolic Rate (BMR) — the calories your body burns at complete rest. This is your body's minimum energy requirement for vital functions like breathing, circulation, and cell production.
Use Calculator →Calories Burned by Activity Calculator
Calculate the exact calories burned during any physical activity using MET (Metabolic Equivalent of Task) values. Select your activity, enter duration and weight for a precise estimate.
Use Calculator →Ideal Body Weight Calculator
Calculate your ideal body weight using four clinically-used formulas (Hamwi, Robinson, Miller, and Devine). These provide a healthy weight range to target — not a single perfect number.
Use Calculator →Running Pace Calculator
Calculate your running pace per mile, total finish time, or required distance. Perfect for race planning, training pace calculations, or setting cardio goals.
Use Calculator →Heart Rate Training Zone Calculator
Calculate your five heart rate training zones to optimize workouts for fat burning, aerobic fitness, or performance. Based on your age and maximum heart rate.
Use Calculator →Keto Macro Calculator
Calculate your exact macros for a ketogenic diet. Get your personalized fat, protein, and net carb targets based on your weight, goal, and chosen keto approach.
Use Calculator →Why Use Our Nutrition Calculators Calculators?
TDEE (Total Daily Energy Expenditure) is the cornerstone of any nutrition plan—it's the number of calories your body burns in a typical day across all activity. Get it right and every other calculation (deficit for fat loss, surplus for muscle gain, maintenance for body recomposition) follows logically. Get it wrong and you'll either stall on your diet or gain unintended fat during a supposed lean bulk. Our TDEE calculator combines resting metabolic rate from the Mifflin-St Jeor equation with activity multipliers validated across clinical populations.
Macro ratios aren't one-size-fits-all. A powerlifter and a marathon runner both need high calorie intakes, but the powerlifter prioritizes protein and carbohydrates for strength recovery while the endurance athlete needs higher carbohydrate ratios to fuel oxidative metabolism during long efforts. Our macro calculators let you set your goal (fat loss, muscle gain, maintenance, athletic performance) and adjust the protein, carb, and fat percentages to fit your specific sport and schedule.
Pro Tips for Nutrition Calculators Projects
- 1Calculate TDEE first—it's your maintenance baseline, and all cutting or bulking targets derive from it.
- 2A 500-calorie daily deficit produces approximately 1 pound of fat loss per week; 250 calories for ½ pound.
- 3Protein has the highest thermic effect of food (25–30%)—meaning your body burns more calories digesting it than fat or carbs.
- 4Track food by weight, not volume—a 'cup' of peanut butter can vary by 30% depending on how tightly you pack it.
- 5Fiber target: 14 grams per 1,000 calories consumed; most people get half the recommended amount.
- 6Micronutrient deficiencies are common even at adequate calorie intake—eating varied whole foods covers most gaps better than supplements.
- 7Hydration affects appetite: thirst and mild hunger share similar signals; drink water before concluding you need more food.