This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
Product upvotes vs the next 3
Waiting for data. Loading
Product comments vs the next 3
Waiting for data. Loading
Product upvote speed vs the next 3
Waiting for data. Loading
Product upvotes and comments
Waiting for data. Loading
Product vs the next 3
Loading
Zone 2 Heart Rate Calculator
Find your Zone 2 range using MAF, Karvonen & % Max HR
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.
Hey Product Hunt! 👋
I built this because I kept running into the same frustration — every Zone 2 calculator online picks one formula and gives you a single number, with zero explanation of why different methods produce different results.
MAF, Karvonen, and percentage of Max HR all give different Zone 2 ranges — and they're all "correct" depending on your situation. So I built a tool that runs all three simultaneously and explains the science behind each.
Enter your age, resting heart rate, and fitness level. You get:
→ Zone 2 range calculated three ways side by side
→ Complete 5-zone training table
→ Weekly training volume recommendations
→ Plain-English explanation of each method
Free. No signup. No email. Works on mobile.
Would genuinely love feedback from anyone who trains by heart rate — especially if the numbers feel off for your experience level. Happy to answer any questions about the methodology!
About Zone 2 Heart Rate Calculator on Product Hunt
“Find your Zone 2 range using MAF, Karvonen & % Max HR”
Zone 2 Heart Rate Calculator was submitted on Product Hunt and earned 3 upvotes and 2 comments, placing #87 on the daily leaderboard. 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.
On the analytics side, Zone 2 Heart Rate Calculator competes within Health & Fitness, Productivity and Sports — topics that collectively have 744.5k followers on Product Hunt. The dashboard above tracks how Zone 2 Heart Rate Calculator performed against the three products that launched closest to it on the same day.
Who hunted Zone 2 Heart Rate Calculator?
Zone 2 Heart Rate Calculator was hunted by Lawrence Goh. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Zone 2 Heart Rate Calculator including community comment highlights and product details, visit the product overview.
Lawrence Goh