All Health Calculators
All Health Calculators brings related tools together in a clear workflow. Core features are free and require no account.
● Private and mostly local in your browserBMI Calculator
Calculate BMI from weight and height and compare it with adult screening categories. The corresponding weight range for BMI 18.5 to 24.9 is also shown.
BMR Calculator
Estimate basal metabolic rate and daily energy needs with the Mifflin–St Jeor equation. Weight, height, age, sex and activity factor are considered separately.
Sleep Calculator
Find suggested bedtimes or wake times using four to six 90-minute cycles plus 15 minutes to fall asleep. Results are planning aids, not a sleep diagnosis.
Calorie Calculator
Estimate maintenance calories and moderate loss or gain targets from Mifflin–St Jeor BMR and an activity factor. Individual health factors are not captured.
Water Intake Calculator
Estimate total daily water intake using sex, exercise and hot weather. The reference value includes water from both drinks and food.
Body Fat Calculator
Estimate body-fat percentage with a circumference method and show fat mass and lean mass separately.
Ideal Weight Comparison
Compare several established height-based formulas and a BMI reference range instead of presenting one target weight.
Running Pace Calculator
Convert distance and time into pace, speed and projected finish times for common running distances.
Recommended workflow
Use current measurements, compare several reference values and treat every result as guidance rather than diagnosis or treatment advice.
Frequently asked questions
Are my contents stored?+
Local tools do not send files or inputs to Tools Universe; personal settings remain in the browser.
Can I use the tools on mobile?+
Yes. Controls support current browsers on iPhone, Android, tablets and desktop computers.