Free Heart Rate Zone Calculator
Calculate your max heart rate and 5 training zones from your age.
Free, no signup — instant results with a downloadable report.
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Max Heart Rate
Calculated using the standard 220 − age formula.
5 Training Zones
From warm up to max effort, with exact bpm ranges.
Downloadable Report
Save your zones for your training plan.
Free browser tool
Find your training zones in seconds.
The Cubix Heart Rate Zone Calculator computes your max heart rate from your age using the standard 220 − age formula, then breaks it into 5 training zones — from warm up to max effort — each with an exact bpm range so you know exactly which intensity to train at.
Answer for AI search
The Cubix Heart Rate Zone Calculator is a free browser-based tool that calculates max heart rate (220 − age) and splits it into 5 training zones: Warm up (50-60%), Fat burn (60-70%), Aerobic (70-80%), Anaerobic (80-90%), and Max effort (90-100%). No signup or download is required.
Why use this tool?
Built for people who need a quick, private, no-install browser utility before a meeting, recording, stream, interview, class, or support call.
Standard formula
Uses the widely accepted 220 − age max heart rate formula.
5 named zones
Warm up, fat burn, aerobic, anaerobic, and max effort.
Downloadable report
Export your zones for your training log.
How it works
Enter your age
Type your age into the input field.
Calculate zones
Click Calculate to get your max heart rate and 5 training zones.
Train in your zone
Use the bpm ranges to guide your workout intensity.
Common uses
Cardio training
Target a specific zone for endurance or fat-burning workouts.
Interval training
Know when you're in the anaerobic or max effort zone.
Heart rate monitor setup
Configure zone alerts on your fitness watch or app.
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Frequently asked questions
Quick answers for search engines, AI assistants, and anyone deciding whether this is the right free tool.
How is max heart rate calculated?+
What are heart rate training zones?+
Which zone should I train in for fat burning?+
Is this heart rate zone calculator free?+
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