Heart Rate Calculator
Calculate maximum heart rate and target training zones for exercise.
How to use Heart Rate Calculator: Open Heart Rate Calculator in your browser — it loads instantly and works offline once cached. Enter your values in the input fields. Every field is labelled so you know exactly what to type. The result updates automatically as you type — there is no "submit" round-trip to a server. Everything runs inside your browser, so your data never leaves your device.
Add a resting heart rate for more accurate Karvonen zones.
Calculate maximum heart rate and target training zones for exercise. Heart Rate Calculator is a free, browser-based tool in the Filevane health & fitness collection — there is nothing to install, no account to create and no watermark on your results. It works on desktop, tablet and mobile, and because the work happens on your own device it stays fast even with large inputs.
How to use Heart Rate Calculator
- Open Heart Rate Calculator in your browser — it loads instantly and works offline once cached.
- Enter your values in the input fields. Every field is labelled so you know exactly what to type.
- The result updates automatically as you type — there is no "submit" round-trip to a server.
- Adjust any input to compare scenarios and see how the outcome changes in real time.
- Copy or note the result. Nothing you enter is stored or sent anywhere.
Why use Heart Rate Calculator?
- 100% free with no limits, no sign-up and no watermarks.
- Private by design — your data are processed in your browser and never uploaded to a server.
- Fast and lightweight, with instant results even on a phone or a slow connection.
- Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
- Part of a full health & fitness suite, so related heart rate tasks are one click away.
Is it private and secure?
Your privacy is built in. Heart Rate Calculator runs completely on your device, so whatever you enter stays in your browser and is never transmitted, logged or stored on any server.
Network activity: none. Nothing is sent and nothing is fetched. This tool makes no network request at all once the page has loaded — which is why it keeps working if your connection drops.
You do not have to take that on trust — our privacy proof page publishes the Content-Security-Policy that enforces it, lists every third party it permits, and shows how to verify the whole claim yourself.
Learn more
Why Browser-Based Tools Are Safer for Your Files — Most online converters upload your files to a server. Client-side tools don't. Here's why that difference matters for privacy.
Frequently asked questions
How do I calculate my maximum heart rate?
The familiar 220 minus age is easy but imprecise, with a standard deviation of about 10-12 beats per minute. The Tanaka formula, 208 minus 0.7 times age, fits the research better across adult ages and is the one worth using.
What are heart rate training zones?
Commonly five bands as a percentage of maximum: 50-60% recovery, 60-70% fat burn, 70-80% aerobic, 80-90% anaerobic and 90-100% maximum effort. The Karvonen method refines these using your resting heart rate, which makes the zones personal rather than generic.
What is a normal resting heart rate?
For most adults, 60-100 beats per minute; trained endurance athletes are often 40-60. Measure it after waking, before getting up, since activity and caffeine both shift it substantially.
Is this medical advice?
No. These are general population formulas with wide individual variation, and medication — beta blockers especially — changes heart rate response entirely. Talk to a doctor before starting a training programme or if your readings concern you.
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