About These Calculators
Advanced health calculators focused on longevity and optimization. From biological age estimates to GLP-1 dosing and zone 2 heart rate training, these tools go beyond basic fitness.
Health & Longevity Calculators
18 toolsGLP-1 Weight Loss Projection Calculator
Project your weight loss timeline on Ozempic, Wegovy, Mounjaro, or Zepbound based on clinical trial data
Biological Age Estimator
Estimate your biological age based on health metrics and lifestyle factors
Longevity Score Calculator
Estimate life expectancy based on lifestyle factors
Zone 2 Heart Rate Calculator
Find your optimal Zone 2 heart rate range for longevity training using MAF, Karvonen, and %Max methods
VO2 Max Estimator
Estimate your VO2 max from running, walking, or step tests and see your fitness percentile by age
CGM Average to A1C Converter
Convert your CGM average glucose to estimated A1C and understand your time-in-range equivalents
Seed Oil Intake Estimator
Estimate your daily seed oil consumption from dietary habits
Blood Pressure Calculator
Check your blood pressure reading against health guidelines
A1C Calculator
Convert between A1C and average blood glucose levels
Caffeine Half-Life Calculator
Track how long caffeine stays in your system
Vitamin D Calculator
Calculate your recommended vitamin D supplementation
Cholesterol Ratio Calculator
Calculate your cholesterol ratios and heart disease risk
VO2 Max Calculator
Estimate your VO2 max from running performance
Sleep Quality Score Calculator
Rate your sleep quality based on key metrics
Daily Step Goal Calculator
Calculate a personalized daily step target
Resting Metabolic Rate Calculator
Calculate calories your body burns at rest
Hydration Needs Calculator
Calculate your daily water intake requirements
Sleep Calculator
Calculate optimal bedtime and wake time based on sleep cycles
Frequently Asked Questions
Are these health & longevity calculators free?
Yes, all 18 calculators are completely free with no signup required. They run entirely in your browser — no data is sent to any server.
How accurate are these calculators?
Our calculators use industry-standard formulas and are regularly updated. However, they provide estimates — always verify critical calculations with a professional in the relevant field.
Can I use these calculators on my phone?
Yes, all calculators are mobile-responsive and work on any device with a web browser. No app download needed.
Do you save my calculations?
No. All calculations happen in your browser. We don't store any of your inputs or results. Your data stays on your device.
Can I embed these calculators on my website?
Select calculators offer embed codes that you can copy and paste into your website or blog. Look for the "Embed This Calculator" section on individual tool pages.