Health, Body & Ergonomics Calculators

Calculate daily electrolyte supplement needs for sodium, potassium, and magnesium based on sweat rate, workout intensity, heat, keto diets, and water loss.

Calculate cat age to human years with precision. Convert kitten months, reverse human age to cat years, explore feline life stage benchmarks, and view charts.

Calculate dog pregnancy due dates, canine whelping windows, daily fetal milestones, and pre-labor temperature drops with reverse mating date planning.

Calculate dog age to human years accurately using veterinary breed size weight curves and epigenetic DNA formulas. Free canine life stage & senior health chart.

Calculate body recomposition calories and macro targets to lose fat and build muscle simultaneously. Get custom TDEE, protein intake, and deficit projections.

Calculate your BMR (Basal Metabolic Rate) and daily TDEE calorie burn using Mifflin-St Jeor, Katch-McArdle, Cunningham, and Harris-Benedict formulas. Set deficit or surplus goals for fat loss.

Convert pedometer steps into miles, kilometers, and calories burned. Features personalized stride length from height, walking pace MET rates, and reverse goal solving.

Calculate creatine dosage for loading and daily maintenance based on body weight. Track muscle saturation curves, monohydrate vs HCL, and hydration targets.

Calculate daily protein intake by body weight, activity level, and fitness goals. Find your optimal grams per day for muscle building, fat loss, and maintenance.

Calculate heat index and wind chill apparent temperature instantly. Assess humidity heat stroke risk, frostbite danger times, and outdoor safety thresholds.

Calculate your blood alcohol concentration (BAC) and hours until sober with our precise Widmark formula calculator. Track drinks, legal driving limits, and decay.

Calculate safe sun exposure minutes for vitamin D synthesis by UV index, Fitzpatrick skin phototype, and clothing coverage. Optimize IU yield without sunburn.

Calculate your dog's daily calorie needs (MER & RER) and exact food portions in cups or grams. Supports dry kibble, wet food, treats, and weight management.

Plan your jet lag sleep schedule and circadian shift with precision light exposure, melatonin timing, sleep shift intervals, and timezone adaptation tables.

Prevent digital eye strain with our screen time 20-20-20 timer. Follow the 20-20-20 rule with automated audio alerts, blink cues, and ergonomic rest intervals.

Calculate optimal ergonomic desk and chair height for sitting or standing desks based on body height, posture angles, footwear, and armrest clearance.

Calculate caffeine half-life, bloodstream decay, and sleep impact. Track multi-dose intake, CYP1A2 metabolism, adenosine block, and bedtime cutoff times.

Calculate your pet's age in human years with our pet age calculator. Convert dog and cat years by breed size, life stage, weight, and veterinary health milestones.

Calculate your daily calorie deficit and target calories for healthy weight loss. Compute BMR, TDEE, macro splits, and projected goal timeline with precision.

Calculate your bench press one rep max (1RM) instantly using Brzycki, Epley, and Lombardi formulas. Get your percentage chart, plate loading, and RPE goals.

Calculate body fat percentage using the official US Navy tape measure method. Compute lean mass, fat mass, military BCA tape test standards, and target waist.

Calculate exact daily water intake based on body weight, exercise, climate, and pregnancy. Get an hourly hydration schedule, bottle tracker, and electrolyte math.

Calculate your pregnancy due date and estimated gestational age by LMP, conception date, or IVF transfer. Get a personalized trimester timeline and milestones.

Calculate your next period, ovulation day, and fertile window with our private period tracker calculator. Predict future cycles and plan with zero data tracking.

Calculate your target heart rate and 5 aerobic training zones using Karvonen and Tanaka formulas. Optimize fat burn, VO2 max cardio, and resting pulse pacing.

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Calculate your TDEE and daily maintenance calories with precision. Compare Mifflin-St Jeor, Katch-McArdle & macro splits for weight loss, cutting, or bulking.

Calculate your pregnancy due date, current gestational age in weeks and days, conception date, and ultrasound milestones with clinical Naegele and IVF accuracy.

Calculate your one rep max (1RM) instantly using validated Brzycki, Epley, and Lander formulas. Features RPE adjustment, plate loading, and rep max percentages.

Calculate daily protein, carbs, and fat with our macro calculator. Set personalized BMR, TDEE, calorie deficit or surplus, and macro ratios for any fitness goal.

Calculate optimal bedtimes and wake-up times aligned with 90-minute ultradian sleep cycles (NREM/REM) to wake up refreshed without morning sleep inertia. 100% private in-browser health cockpit.

Calculate your ideal body weight (IBW) using consensus clinical formulas (Devine, Robinson, Miller, Hamwi) and healthy BMI bounds. 100% private in-browser health cockpit.

Calculate accurate body fat percentage and lean muscle mass using the official US Navy Circumference Method with body category classification. 100% private in-browser health cockpit.

Calculate Daily Calorie Needs, Basal Metabolic Rate (BMR), and Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor & Katch-McArdle formulas with macro targets. 100% private in-browser health cockpit.

Calculate your personalized daily hydration requirement based on body mass, climate temperature, exercise duration, and pregnancy/lactation factors. 100% private in-browser health cockpit.

Calculate Body Mass Index (BMI) using metric (cm/kg) or imperial (ft/in/lbs) units with WHO classification categories, healthy weight targets, and visual prime index meters.