Target Heart Rate (Weight Loss) Calculator
Fat-burn, cardio, and peak zones for weight loss
Use this when you need a fast, accurate result — no sign-up, works entirely in your browser.
Fat-burn zone (60-70% HRR)—
Cardio zone (70-80% HRR)—
Estimated max HR—
How to Use
- Enter your details into the fields above.
- Click the calculate button to get your result instantly.
- Use the clear button to start a new calculation.
Example
- Age 30, resting 70, goal fat-burn → Zone 130–154 bpm (≈ 50–70% HRR)
- Age 35, resting HR 70 → Fat-burn 145 bpm, cardio 156 bpm, max 185 bpm
Formula
Karvonen formula: Target = Resting + HRR × intensity. Fat-burn 50–70%; cardio 70–85%; peak 85–95%. Lower-intensity "fat-burn" zones burn a higher % of fat but fewer total calories.
About Target Heart Rate (Weight Loss) Calculator
Fat-burn, cardio, and peak zones for weight loss. This free online tool gives you fast, accurate results without registration or downloads.
Everything runs locally in your browser, so your data is never uploaded or stored — privacy first.
Frequently Asked Questions
Is this tool free to use? +
Yes, it is completely free with no registration or download required.
Is my data private? +
Yes. Everything is processed locally in your browser. Nothing is uploaded or stored on our servers.
Does it work on mobile? +
Yes, it works on any device — phone, tablet, or desktop.