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 tools

GLP-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.