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Calculate TDEE, macros, body fat, ideal weight, water intake, sleep cycles, heart rate zones, and more health & fitness metrics.
Useful for gym-goers, runners, and anyone tracking their wellness journey. Estimate daily calorie needs, set macro targets, plan sleep cycles, and monitor training heart rate zones. These calculators use established formulas like Mifflin-St Jeor and Karvonen to give you science-backed starting points -- though always consult a healthcare provider for personalized advice.
Calculate your Total Daily Energy Expenditure based on age, weight, height, activity level, and BMR formula. Includes macro targets.
Calculate your daily protein, carbs, and fat intake based on calorie goals with preset and custom macro splits.
Estimate your body fat percentage using the US Navy method or BMI-based calculation with category classification.
Find your ideal weight range using Robinson, Miller, Devine, and Hamwi formulas adjusted for frame size.
Calculate your daily water intake based on weight, activity level, climate, and special conditions.
Calculate your estimated due date from LMP, conception date, IVF transfer, or ultrasound with milestone timeline.
Calculate your ovulation date, fertile window, and next period date with a 3-cycle forecast calendar.
Predict your next 6 periods with fertile windows and ovulation dates in a color-coded calendar view.
Calculate your 5 heart rate training zones based on age and resting heart rate with the Karvonen method.
Calculate optimal bedtimes or wake times based on 90-minute sleep cycles for better rest.
Calculate your daily protein needs based on weight, activity level, fitness goal, and diet type.
Calculate running or walking pace, time, or distance. Get splits and estimated race finish times.
Calculate your waist-to-hip ratio and assess health risk category based on WHO guidelines.
Estimate your Blood Alcohol Content using the Widmark formula based on drinks, weight, gender, and time.
Calculate calories burned from 100+ activities using MET values based on duration and body weight.
ToolPeg's health and fitness tools are designed for educational planning around energy needs, body metrics, pregnancy timelines, hydration, and similar everyday calculations.
They can be useful starting points for self-tracking and discussion, but they are not substitutes for individualized medical advice or clinical assessment.
Popular picks in this category include TDEE Calculator, Macro Calculator, Pregnancy Due Date Calculator, and Water Intake Calculator.
Calculate your Total Daily Energy Expenditure based on age, weight, height, activity level, and BMR formula. Includes macro targets.
Calculate your daily protein, carbs, and fat intake based on calorie goals with preset and custom macro splits.
Calculate your estimated due date from LMP, conception date, IVF transfer, or ultrasound with milestone timeline.
Calculate your daily water intake based on weight, activity level, climate, and special conditions.
Health-related outputs should be treated as estimates only and checked with a qualified clinician, dietitian, or medical source when the result affects care or treatment.
Curated guides, glossaries, and comparisons for this category's key workflows.
Choose the right health calculator for TDEE, macros, due dates, hydration, and other everyday planning questions instead of treating every estimate the same way.
A plain-English guide to TDEE, BMR, activity multipliers, and how maintenance calories are used for weight-loss or muscle-gain planning.
Understand the difference between maintenance calories and a calorie deficit so TDEE and macro-planning tools are easier to use in practice.