Health & Fitness

Body, fitness and wellbeing calculators.

50 tools

Allergy Reaction Log Record allergic reactions: allergen, symptoms, severity and treatment.
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BAC Estimator Widmark blood alcohol concentration estimate from drinks and weight.
Body Fat % (US Navy Method) Estimate body fat percentage from neck, waist (and hip) measurements.
Body Surface Area (BSA) Compute BSA via Mosteller, DuBois and Haycock formulas — used for chemo and drug dosing.
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Bowel Movement Log (Bristol Scale) Track bowel movements on the Bristol stool scale for gut health.
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Caffeine Half-Life Tracker Project caffeine in your system over time from a list of doses.
Calories Burned by Activity Estimate calories burned via the MET (metabolic equivalent) table.
Carb Loading Calculator Daily carb target for endurance carb-loading in the days before an event.
CPAP Pressure / Compliance Log Track nightly CPAP usage hours, AHI, pressure and mask leak.
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Cycling Power-to-Weight Compute watts per kilogram and categorise via Coggan-style tables.
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Daily Water Intake Estimator Suggested daily water intake from body weight and exercise minutes.
Dental & Vision Visit History Track dental and optometry visits, outcomes and prescriptions.
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FTP Estimator Estimate functional threshold power from a 20-min, 1-hour, ramp or CP value.
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GCS / APGAR / qSOFA Scorers Compute Glasgow Coma Scale, APGAR (newborn) and qSOFA (sepsis screen).
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GFR / Creatinine Clearance (Cockcroft-Gault & CKD-EPI) Compute Cockcroft-Gault creatinine clearance and CKD-EPI 2021 eGFR.
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Glycemic Load Calculator Glycemic Load = GI × carb grams / 100. Low/med/high categorisation.
Headache / Migraine Tracker Log headaches with duration, severity, triggers and medication.
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Heart Rate Training Zones Five training zones from your age and (optional) resting heart rate.
Heart Rate Zones (Karvonen) Compute training heart-rate zones from age and resting HR using the Karvonen method.
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HRV (RMSSD / SDNN) Calculator Compute time-domain HRV metrics RMSSD and SDNN from RR intervals.
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Ideal Body Weight Devine, Robinson, Miller and Hamwi ideal body weight estimates.
IV Drip Rate (gtts/min) Compute drops per minute and pump rate (mL/h) for IV infusion sets.
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Lean Body Mass Calculator Estimate lean body mass and fat mass using the Boer formula.
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Meditation / Cold Shower / Sauna Streak Build daily streaks for meditation, cold showers, sauna or breathwork.
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One-Rep Max Calculator Estimate 1RM with Epley, Brzycki and Lombardi formulas.
Pediatric Dose Calculator (mg/kg) Compute pediatric dose by weight and check against a daily max.
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Period & Ovulation Predictor Log cycles and auto-predict ovulation and fertile window.
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Plate Loading Calculator Compute which plates to load onto a barbell to reach a target weight.
Pregnancy Due Date Estimator Estimate due date from last menstrual period using Naegele's rule.
Pregnancy Week Tracker Track pregnancy progress: gestational week, trimester and due date.
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Protein Intake Calculator Estimate a daily protein target from body weight and activity level.
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Pushup / Pullup / Plank Test Log Track max reps or hold time for bodyweight exercises over time.
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Race Result History Log running/cycling/triathlon race results with finish time and placing.
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Race Time Predictor Predict times across distances using Riegel's formula.
Riegel Race Time Predictor Predict a target-distance race time from a known performance using Pete Riegel's formula.
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Running Pace Calculator Pace, finish time, splits and km↔mile pace conversion.
Skin Mole / Spot Diary Track moles and skin spots over time with the ABCDE melanoma checklist.
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Sleep Cycle Calculator When to fall asleep (or wake up) to align with 90-minute sleep cycles.
Smoking Cost / Quit-Savings Calculator See the daily-to-decade cost of smoking — and what quitting would save.
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Standard Drinks Calculator Convert a drink's volume and ABV into US/UK/AU standard drink units.
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Strength Standards Lookup Approximate novice/intermediate/elite 1-rep-max for big lifts by bodyweight.
Stride × Cadence → Pace Compute running speed and pace from stride length and cadence.
Sweat Rate Calculator Estimate sweat rate from pre/post-exercise body weight and fluids consumed.
TDEE & Macro Calculator BMR / TDEE from Mifflin-St Jeor plus a configurable macro split.
Therapy Session Notes Keep private notes from therapy sessions: mood, topics and homework.
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Training Stress Score (TSS) Compute TSS from duration, normalized power and FTP.
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VO₂ Max Estimator Estimate VO₂ max from Cooper or Rockport submaximal tests.
Waist-to-Hip Ratio Compute waist-to-hip ratio and the associated WHO health-risk band.
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Wind Chill / Heat Index / Dew Point Apparent-temperature calculations: wind chill (cold), heat index (hot), dew point.
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Workout Volume Calculator Sum sets × reps × weight across a workout to track tonnage week-over-week.