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Catalyst Healthspan Tools
Catalyst Healthspan Tools
Overview
Catalyst Healthspan Tools is a set of ten free, evidence-based calculators that measure how well your body is ageing. Not how it looks.
Each calculator maps to one of the four pillars used in a real assessment protocol at Catalyst Performance, a longevity training studio in Singapore's CBD: body composition, cardiorespiratory fitness, stability, and strength. Enter a few numbers, get an instant result, and see your percentile by age and sex alongside what that number actually predicts.
No sign-up. No email wall. No app. Every threshold is drawn from published reference standards and cited on the page.
Key Features
Ten calculators, one system. Fitness Age, VO2 Max, Grip Strength, Waist-to-Height Ratio, Sitting-Rising Test, Body Fat (Navy tape method), Protein Intake, Heart Rate Zones, Running Pace, and a GLP-1 Muscle-Loss estimator.
Percentile scoring by age and sex, so a result is a position against your peer group rather than a bare number.
Cited evidence on every tool. Each calculator shows the research its thresholds come from, including the mortality and healthspan literature behind grip strength, VO2 max, and the sitting-rising test.
No account, no data collection. Results compute in the browser. Nothing is stored.
Free to embed on any site. One line of code, no API key, no usage limit. The only condition is keeping the small attribution link.
The Healthspan Audit. A 12-question, two-minute assessment that returns a composite Healthspan Score on a 0 to 10 scale, benchmarked against over 700 completed audits.
Built mobile-first, because most people check these standing in a gym.
Use Cases
Getting a baseline in your 30s and beyond. Most health metrics people track are weight and appearance. These measure capacity: how far you can go, how hard you can grip, how well you get off the floor.
Training on a GLP-1 medication. The GLP-1 Muscle-Loss calculator estimates how much of your weight loss on semaglutide or tirzepatide is likely to be muscle rather than fat, which is the part most weight-loss tracking ignores.
Race planning. The Running Pace calculator predicts 5K through marathon times from a single known result, and the Heart Rate Zones calculator sets the training bands to hit them.
Coaches, trainers, and clinicians who want a fast screening number before a full assessment.
Site owners and writers who need an interactive tool on a health or fitness page without building one.
Getting Started
Go to catalystperformance.sg/tools and pick a calculator.
Enter your numbers. Results are instant, with your percentile and an explanation of what the score means.
For a composite picture, take the Healthspan Audit: 12 questions, two minutes, one score across all four pillars.
To put a calculator on your own site, copy the embed code from catalystperformance.sg/tools/embed and paste it into your page.
Pricing & Plans
Free. All ten calculators and the Healthspan Audit are free to use with no account, no email required, and no usage limit. Embedding is free on any website, with attribution.
Paid services sit behind the tools rather than inside them: an in-studio Healthspan Assessment and personal training at the Singapore studio, plus online coaching for people training anywhere in the world. Details at catalystperformance.sg/pricing.
Publisher
B
Bervin Manoharan
Launch Date2026-07-28
Platformweb
Pricingfree
Tech Stack
#Next.js#React#TypeScript#Tailwind CSS#Vercel