Zone 2 Heart Rate Calculator

What it does

Most Zone 2 calculators use one formula. This runs all three — MAF, Karvonen, and % of Max HR — simultaneously so you see the full picture. Enter your age, resting heart rate, and fitness level. Get your Zone 2 range three ways, a complete 5-zone training table, weekly volume recommendations, and plain-English explanations. Free. No signup. No email. Built for runners, cyclists, and anyone serious about aerobic base training and longevity.

• 
  Heart Zone Finder2025 · ▲7

  Your Personal Heart Rate Zone Calculator

• 
  Heart Rate Zones Plus – The first iOS app I developed2025 · apps.apple.com · ▲100

  I built this iOS app because I wanted to get an overview of my time in zones per week without checking zones after every workout manually - Now I'm looking for feedback. Description: Track time in heart rate zones. Track per day, week, month, 7 days and 30 days time period and how much time you spend in each zone. Set goals & visualize progress. Get details about heart rates zones of your workouts. Features: Custom time periods, Workout to zone attribution to get a feeling which sport attributed most to each zone, Multiple zone calculation methods, Set personal time goals for any zone,…

• 
  ZonePoints: Bluetooth Heart Rate MonitorJul 2026 · zonepoints.app · ▲3

  Turn any workout into one simple heart rate score.

• 
  My Health ToolsJun 2026 · my-health-tools.com · ▲3

  Find out your biological age in 3 minutes — free

• 
  Running Pace Calculator2025 · joincentury.app · ▲91

  Calculate your running pace, time & distance online

• 
  Zone 2 Longevity CoachJun 2026 · apps.apple.com · ▲3

  AI Zone 2 coach for longer healthspan

• 
  Lofi Cities – Pixel-art city nights with browser-generated lofi▲319

  Endless lofi beats composed live in your browser, over pixel-art nights in Paris, Tokyo, New York, Hong Kong, Sydney, San Francisco and more. Free, no sign-up.

  Work · 25d ago · loficities.com

• 
  Smooth Recorder▲257

  Mac screen recordings that look edited when you hit stop

  Work · 19d ago · smoothrecorder.com

• 
  Figma Specs▲223

  A container for your context that lives on the Figma canvas

  Work · 4d ago · figma.com

• 
  The rarest tech books and docs you've probably never read▲190

  Work · 13d ago · readrare.com

• 
  Brila▲1,364

  One-page websites from real Google Maps reviews

  AI · Apr 2026 · brila.ai

• AG
  A game where you build a GPU▲964

  Thought the resources for GPU arch were lacking, so here we are

  Life & fun · Apr 2026 · jaso1024.com

• 
  I built a tiny LLM to demystify how language models work▲915

  Built a ~9M param LLM from scratch to understand how they actually work. Vanilla transformer, 60K synthetic conversations, ~130 lines of PyTorch. Trains in 5 min on a free Colab T4. The fish thinks the meaning of life is food. Fork it and swap the personality for your own character.

  AI · Apr 2026 · github.com

• 
  Fathom 3.0▲800

  AI meeting notes: now bot-free, in ChatGPT & Claude + more

  AI · Apr 2026 · fathom.ai

• 
  Brutalist Concrete Laptop Stand (2024)▲786

  I made a laptop stand out of solid concrete, in the style of brutalist architecture, with themes of urbex and urban decay

  Life & fun · Apr 2026 · sam-burns.com

• 
  I built a frontpage for personal blogs▲783

  With social media and now AI, its important to keep the indie web alive. There are many people who write frequently. Blogosphere tries to highlight them by fetching the recent posts from personal blogs across many categories. There are two versions: Minimal (HN-inspired, fast, static): https://text.blogosphere.app/ Non-minimal: https://blogosphere.app/ If you don't find your blog (or your favorite ones), please add them. I will review and approve it.

  AI · Apr 2026 · text.blogosphere.app