Fitness & Health Calculators
Plan training and understand common health metrics with fast, private calculators. From BMI and calorie estimates to pregnancy dating and cycle tools, everything runs locally with clear disclaimers for education—not medical advice.
20 free tools · No sign-up required
BMI Calculator
BMI and category from height and weight.
Calorie Calculator (TDEE)
Maintenance calories (TDEE) estimate.
BMR Calculator
Basal metabolic rate in kcal/day.
Due Date Calculator
Due date from LMP.
Age Calculator
Exact age from your birth date.
Pregnancy Calculator
EDD, weeks, and trimester from LMP.
Body Fat Calculator
Tape-measure body fat estimate (Navy).
Ovulation Calculator
Ovulation day and fertile window.
Ideal Weight Calculator
Devine ideal weight from height.
Healthy Weight Calculator
Healthy kg range for your height.
Target Heart Rate Calculator
Heart-rate zones for training.
Pregnancy Weight Gain Calculator
IOM-style gain range from pre-pregnancy BMI.
Conception Calculator
Likely ovulation and conception window.
Army Body Fat Calculator
Tape-based estimate used in screening.
Calories Burned Calculator
kcal burned from MET and time.
Pregnancy Conception Calculator
Conception and EDD from LMP.
Pace Calculator
Pace per km from time and distance.
Lean Body Mass Calculator
LBM estimate from height and weight.
Period Calculator
Next period from cycle length.
One Rep Max Calculator
1RM estimate from weight × reps.