Health Calculators

Each tool is built on published clinical data with references provided. No accounts, no tracking, everything runs in your browser.

Guided Plan Wizard

Chain body composition, TDEE, macros, protein timing, hydration, electrolytes, and supplement scheduling into one unified plan you can print or share.

HRT Estrogen Route Conversion

Convert between BiEst cream, estradiol patches, gels, and oral formulations. Includes progesterone matching for endometrial protection and route-specific safety notes for the current patch shortage.

Peptide Response Estimator

Estimate how sermorelin or tesamorelin may change your IGF-1 over 3 to 6 months. Enter optional baseline labs for a personalized projection.

GLP-1 Response Estimator

Project your weight, A1c, and glucose trajectory on semaglutide or tirzepatide with realistic stepwise dose titration. Built on Phase III trial data.

TRT Protocol Optimizer

Simulate your testosterone curve across a dosing interval. Anchor to your own labs, toggle injection frequency, and see age-adjusted reference ranges derived from pre-decline cohort data.

Caffeine Clearance

Model caffeine pharmacokinetics based on dose, body weight, and CYP1A2 metabolizer status. Includes a clearance curve and personalized cutoff time for sleep.

Sleep Debt Tracker

Enter your sleep over the past 7 days and see your cumulative deficit, severity assessment, and a gradual recovery plan.

Vitamin D Repletion

Calculate D3 dosing to reach your target 25-OH level based on current labs, body weight, BMI category, and timeframe.

Creatine Loading

Compare loading vs. daily dosing protocols. Optimal dose by lean body mass with saturation timeline chart.

Protein Intake

Find your daily protein target by body weight, goal (build, maintain, lose, health), activity level, and age.

Hydration Calculator

Estimate daily fluid needs by weight, activity, climate, and diet. Includes a hydration status self-check with symptom assessment.

Body Composition Tracker

Log your InBody or BIA scans over time. See your real fat loss and muscle rates, project when you hit a target body fat percentage, and get calorie and protein targets from measured lean mass.

TDEE Calculator

Total daily energy expenditure reported as an honest range instead of a fake-precise number, plus adaptive TDEE measured from your own weight and intake data.

Macro Calculator

Split a calorie target into protein, carbohydrate, and fat by goal and diet preference. Protein set from lean mass, fat floored for hormone health, with food portions.

Body Fat Estimator

US Navy circumference method with a visual reference scale, lean mass, goal weight projection, and a straight account of how it compares with DEXA.

Supplement Timing Optimizer

Check off your full stack and get a daily schedule that separates competing minerals, pairs fat-soluble vitamins with meals, and works around your medications.

Electrolyte Needs

Sodium, potassium, and magnesium from your climate, sweat rate, training, and diet. Includes a sweat rate test, desert heat guidance, and a DIY drink recipe.

Fiber Diversity Score

Score your prebiotic variety across nine fiber classes and the 30-plant benchmark, then get the specific foods that close your biggest gaps.

Drug-Nutrient Depletion Checker

Check off your medications and see which nutrients each one depletes, graded by evidence strength, with monitoring labs and food or supplement countermeasures.

Cortisol Rhythm Estimator

Plot the expected 24-hour cortisol curve for your wake time and overlay 4-point salivary test results to spot blunted CAR, flat slopes, or high evening cortisol.

Thyroid Conversion

See where TSH, free T4, and free T3 sit in their reference ranges, compute your FT3:FT4 conversion ratio, and understand the low-T3, normal-TSH pattern.

Inflammation Marker Interpreter

Enter hs-CRP, ESR, ferritin, or fibrinogen results and see where each sits, what raises it besides inflammation, and what the combined pattern suggests.

Methylation Load Estimator

Compare your methyl-donor intake (folate, B12, choline, betaine) against reference targets by MTHFR genotype, with evidence-graded flags for support gaps and over-supplementation.

Omega-3 Dosing

Dose EPA and DHA by goal, from general health to triglyceride lowering. Predicts your Omega-3 Index at 13 weeks from dose, baseline, and supplement form.

Melatonin is a clock signal, not a sedative. Estimate your dim light melatonin onset from a quick chronotype quiz, then get the dose and exact clock time for sleep onset, schedule shifts, or eastward jet lag.

B-Vitamin Form Guide

Compare methylfolate vs folic acid, methylcobalamin vs cyanocobalamin, P5P vs pyridoxine, and more. Get a form, dose range, and label terms matched to your MTHFR status and goal.

Zinc/Copper Ratio Checker

Sum zinc and copper from supplements and diet, check the ratio against the ideal 8:1 to 12:1 band, and get a concrete copper dose to rebalance high zinc.

Magnesium Form Comparison

Compare eight magnesium forms by elemental percentage, absorption, GI tolerance, and cost. Pick a goal for a ranked recommendation, then convert any dose to elemental mg.

Iron Absorption Estimator

Estimate how much iron you actually absorb from a meal or day, splitting heme and non-heme and adjusting for vitamin C, meat, phytates, calcium, tea, and ferritin status.

Alcohol Metabolism

Estimate your BAC curve with the Widmark equation. See when you cross 0.08, 0.05, and zero, with elimination-rate uncertainty bands and impairment context.