Fitness, Nutrition & Health Calculators
Calculate BMI, daily calorie targets, BMR, and workout pacing with scientifically verified formulas. Completely private and anonymous.
Available Fitness & Health (9)
100% Free & UnlimitedCompute Body Mass Index (BMI), healthy weight target ranges, and World Health Organization categories.
Determine Total Daily Energy Expenditure (TDEE) and caloric targets for weight loss, maintenance, or gain.
Estimate body fat percentage, lean body mass, and fat mass using the standardized US Navy circumference method.
Calculate Basal Metabolic Rate using both Mifflin-St Jeor and revised Harris-Benedict formulas.
Compare ideal body weight estimates across medical formulas: Devine, Robinson, Miller, and Hamwi.
Calculate running pace, speed, finish times, and kilometer/mile splits for 5K, 10K, Half, and Full Marathons.
Track gestational age in weeks & days, trimester progress, developmental milestones, and days to delivery.
Estimate the most probable conception date window and fertile intercourse window from LMP or due date.
Determine estimated delivery date (EDD) based on last menstrual period, conception, or cycle adjustments.
Underlying Mathematical & Technical Formulas
Standard formulas utilized in our client-side calculation engines
BMR = 10W + 6.25H - 5A + 5Calculates baseline daily calories burned where W = weight (kg), H = height (cm), A = age (years).
BMR = 10W + 6.25H - 5A - 161Calculates female resting metabolic burn for precise caloric deficit/surplus planning.
Frequently Asked Questions
Are health metrics stored on OmniToolsNet?
No. No cookies, no accounts, and no health data tracking. Your height, weight, and fitness metrics disappear the second you close the tab.