Heart Rate Zones Calculator

The Trencada Heart Rate Zones Calculator finds your five heart rate training zones from your age — or your own max heart rate if you know it. See the bpm range for each zone from recovery to peak, with what each zone trains. Everything runs in your browser — free, no signup. HOW TO USE: 1. Enter your age. 2. Optionally enter your known max heart rate. 3. Press Calculate zones. KEY FEATURES: 5 training zones with bpm ranges; optional custom max HR; visual zone bars; mobile friendly; 100 percent private.

Frequently Asked Questions (FAQ)

What are heart rate training zones?

Zones divide your heart rate range into intensity bands — recovery, fat burn, aerobic, threshold and maximum — each training a different aspect of fitness.

How are my zones calculated?

Enter your age for an estimated max heart rate, or enter your measured max directly for more accurate zones.

Which zone burns the most fat?

The fat-burn zone uses the highest percentage of fat for fuel, but higher zones burn more total calories. The best zone depends on your goal.

Should I train in zone 5?

Sparingly. Maximum-effort intervals build speed and power, but most training time belongs in lower zones for endurance and recovery.

Is the heart rate zones calculator free?

Yes. It is free to use with no signup and no limits.