Free online heart rate calculator
Target Heart Rate Calculator
Target heart rate zone calculator using the Karvonen formula from age and resting HR.
- Free · No signup
- Instant results
- Private in your browser
- Works on mobile
Result
Karvonen target heart-rate zone from age and resting HR.
About this heart rate calculator
Find a 50–85% training heart-rate zone with the Karvonen method, plus estimated maximum heart rate.
Use this free online target heart rate calculator when you need a quick, clear estimate without creating an account. Calculations run in your browser on Toolwright, so your inputs stay private. Results are for education and planning — confirm important financial, tax, or health decisions with a qualified professional.
How to use the Target Heart Rate Calculator
- Enter the values asked for in the form — amounts, rates, dates, or measurements depending on the tool.
- Tap calculate to see your result instantly. Adjust inputs anytime to compare scenarios.
- Review the breakdown and FAQs below if you want more context on what the numbers mean.
Why people use Toolwright
- Clear answers — dedicated page for the target heart rate calculator, built to load fast and stay easy to read.
- Fast & free — no paywall, no email gate, results above the noise.
- US-ready — copy and units aimed at American and Western users.
- One toolkit — jump to related fitness & health tools without leaving the site.
Target Heart Rate Calculator FAQ
Is this medical advice?
No. These calculators provide estimates only. For diagnosis or treatment decisions, consult a qualified clinician.