ToolGrid AIHeart Rate Zones
Estimate training heart-rate zones from age using 220 minus age.
Runs entirely in your browser — your selected files are not uploaded by this tool. Device-provided speech voices may use online services.
About this free heart rate zones tool
Estimate training heart-rate zones from age using 220 minus age. Calculators answer a defined arithmetic question using the values you supply. Keep units and currencies consistent, choose the correct starting amount and inspect the assumptions before using a result. Estimates do not replace a lender quotation, an official tax rate, a medical assessment or a jurisdiction-specific deadline rule.
A practical example
A concrete example uses age: 40. The result is Max heart rate: 180 Zone 2 (60–70%): 108–126 Zone 4 (80–90%): 144–162.
Before you rely on the result
A general planning estimate, not medical advice. Individual needs vary; ask a qualified professional about your own situation.
Frequently asked questions
Is the heart rate zones free to use?
Yes. The Heart Rate Zones is free, needs no account and has no usage limit beyond what your device can handle.
Are my files or numbers uploaded anywhere?
No. The Heart Rate Zones runs in your browser, so the values and files you enter stay on your device. Close the tab and nothing is kept.
What does the heart rate zones do?
Estimate training heart-rate zones from age using 220 minus age. Calculators answer a defined arithmetic question using the values you supply. Keep units and currencies consistent, choose the correct starting amount and inspect the assumptions before using a result. Estimates do not replace a lender quotation, an official tax rate, a medical assessment or a jurisdiction-specific deadline rule.
When should I double-check the result?
A general planning estimate, not medical advice. Individual needs vary; ask a qualified professional about your own situation.
Can I share my result?
Yes. Use Copy result or Download, and on calculator-style tools use Copy share link to send someone a link that opens with the same inputs filled in.