Karvonen Target Heart Rate Calculator
Fill in the values and the answer updates as you type.
How the Karvonen Target Heart Rate Calculator works
Target = resting heart rate + (maximum − resting) × intensity. Maximum is estimated as 220 − age, which is only an average. Example: with Age 35 years, Resting heart rate 60 bpm, and Intensity 70%, the result is Target heart rate (bpm) = 148; Maximum heart rate (bpm) = 185; Heart rate reserve (bpm) = 125.
Inputs and results
The Karvonen Target Heart Rate Calculator takes 3 inputs and gives 3 results.
What you enter
- Age (years) — starts at 35.
- Resting heart rate (bpm) — starts at 60.
- Intensity (%) — starts at 70.
What you get
- Target heart rate (bpm)
- Maximum heart rate (bpm)
- Heart rate reserve (bpm)
Example: Karvonen Target Heart Rate Calculator with the starting values
With age 35 years, resting heart rate 60 bpm and intensity 70 %, the calculator returns:
| Target heart rate (bpm) | 148 |
|---|---|
| Maximum heart rate (bpm) | 185 |
| Heart rate reserve (bpm) | 125 |
Change any value above and the results update straight away.
Karvonen Target Heart Rate Calculator FAQ
How do I use the Karvonen Target Heart Rate Calculator?
Enter age, resting heart rate and intensity in the fields, then read target heart rate (bpm), maximum heart rate (bpm) and heart rate reserve (bpm) in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Karvonen Target Heart Rate Calculator calculate?
Target heart rate using heart rate reserve. It returns target heart rate (bpm), maximum heart rate (bpm) and heart rate reserve (bpm) from the 3 values you provide.
What values does the Karvonen Target Heart Rate Calculator start with?
It opens with age 35 years, resting heart rate 60 bpm and intensity 70 % so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Karvonen Target Heart Rate Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Karvonen Target Heart Rate Calculator for medical or health decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm medical or health decisions with a qualified professional. See the Disclaimer for more.