Longevity Toolkit
20 Free Tools to Decode Your Longevity
Science-backed calculators trusted by the biohacker community. No signups. No paywalls. Just answers.
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Biological Age & Biomarkers
6 toolsSee your bio age vs chronological age
Biological Age Calculator
“Is your body older than you are?”
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Lifestyle-based NAD+ depletion score
NAD+ Level Estimator
“How empty is your NAD+ tank?”
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Lifestyle-adjusted longevity projection
Life Expectancy Calculator
“How many days do you have left?”
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Close the gap between years alive and years healthy
Healthspan vs Lifespan Gap
“You’ll live to 83. Healthy until 67.”
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Estimate without a treadmill test
VO2 Max Estimator
“The #1 longevity biomarker”
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Where do you rank for your age?
Grip Strength Percentile
“Grip strength = survival”
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Supplement & Dosage
5 toolsDose tailored to weight, age, and goals
NMN Dosage Calculator
“Your personalised longevity prescription”
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Prevent methylation depletion from NMN
TMG Dosage Calculator
“Balance your methyl donors”
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Copy Bryan Johnson’s or design your own
Stack Builder
“Build your longevity stack”
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Check for conflicts and synergies
Supplement Interaction Checker
“Are your supplements fighting?”
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Purity-adjusted $/gram across brands
Cost-Per-Dose Comparison
“What you’re really paying”
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Fasting & Nutrition
4 toolsLive countdown through fasting phases
Autophagy Timer
“When does cellular cleanup begin?”
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Attia-style calculations for longevity
Protein Requirement Calculator
“How much protein do you actually need?”
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Resolve the longevity paradox
CR vs Protein Balance
“Eat less, or stay strong?”
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Personalised to your chronotype
Eating Window Optimizer
“Your perfect fasting schedule”
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Sleep, Recovery & Lifestyle
3 toolsThe data is only the beginning.
Every tool is free. What you do with the result — that's where Dan Alchemy NMN comes in.
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