Favourites
Your saved calculators appear here and on the home page.
Filter life & health calculators
All life & health tools
- Ideal weight calculator – Devine, Hamwi and BMI ranges.
Estimate ideal body weight with the Devine, Hamwi, Robinson and Miller formulas, set a custom BMI goal, and compare.
- Body Fat Percentage Calculator | US Navy & BMI.
Estimate body fat percentage with the US Navy circumference method or BMI (Deurenberg).
- Due Date Calculator (LMP, IVF, Ultrasound).
Estimate your pregnancy due date and current gestational age from LMP, conception, IVF transfer, or ultrasound date.
- 1RM (One-Rep Max) & Training Weight Calculator.
Estimate your 1RM from weight and reps using common formulas, then convert to training weights by %1RM or target reps.
- Calorie & Weight-loss Planner | TDEE, Targets.
Estimate your TDEE, set a calorie target to hit your goal weight by a chosen date, or see how long it will take.
- Health & fitness calculators — BMI, calories, body fat.
Estimate BMI, body fat %, BMR/TDEE calories, ideal weight, heart rate zones, and due dates.
- Heart Rate Zone Calculator.
Find your training heart rate zones in bpm using %HRmax, Karvonen (HRR), or %LTHR.
- Running Pace, Time and Distance Calculator.
Solve running pace, time, or distance from the other two.
- Sleep Cycle Calculator | Bedtime & Wake-up Times.
Find suggested bedtimes or wake-up times using sleep cycles and a fall-asleep buffer.
Featured
Popular health tools picked for quick access.
- BMI calculator (kg/cm) – BMI & WHO category.
Enter weight (kg) and height (cm) to get your BMI and WHO category instantly. Copy a shareable result link.
- BMR & TDEE calculator – daily calorie needs and energy.
Estimate your basal metabolic rate and total daily energy expenditure with the Mifflin-St Jeor equation.
- BMI, BMR & TDEE Calculator | Metric & Imperial Units.
Enter your age, sex, height, weight and activity level to calculate BMI, basal metabolic rate (BMR) and total daily.
A–Z Index
Jump alphabetically within life & health tools.
Choose the life or health page by the goal first
Use this hub when the question is about body metrics, calorie planning, training load, or everyday personal planning, but you have not picked the exact page yet.
Open these sections first
- Body metrics: start with BMI or body-fat pages when you need a screening-style estimate from measurements.
- Calories and metabolism: open BMR & TDEE or the calorie planner when the goal is daily intake, targets, or maintenance.
- Training load: open 1RM when the next question is lifting intensity, estimated max, or percentage-based training weight.
- Broader health routing: move to the Health & Fitness topic hub when the question expands beyond one metric.
Best workflow
- Choose one health question.
- Open one calculator that matches that question.
- Return here only if the next step changes from measurement to planning, or from planning to training.
FAQ
When should I start here instead of a single health calculator?
Start here when you know the broad area, such as calories or body metrics, but have not decided which single page fits your goal yet. If you already know you need BMI, body fat, or 1RM, go directly to that calculator.
Which page should I use for calorie targets?
Use BMR & TDEE when you need maintenance calories first. Use the calorie planner when you already want a weight-change target and a daily intake plan.
Which page should I use for training numbers?
Use 1RM when the next step is estimating lifting intensity or percentage-based training loads. Stay on the broader hub only while you are still choosing the right training page.
Is this page medical advice?
No. These pages are for planning and education. Use qualified medical guidance for diagnosis, treatment, or high-stakes health decisions.
Start with these pages
- Health & fitness topic hubOpen this hub when you want the broader map across body metrics, calories, and workout planning.
- BMI calculatorUse this for a quick body-mass screening estimate from height and weight.
- BMR & TDEE calculatorMove here when the next question is daily calorie needs and maintenance intake.
- 1RM and training weight calculatorOpen this when the next step is lifting intensity, estimated max, or training percentages.