How to use it
- Enter your resting heart rate (bpm).
- Enter your age in years.
- Set the desired training intensity (e.g., 0.65 for 65%).
- Click Calculate to see your target bpm.
What it does – The calculator applies the Karvonen formula (max HR = 208 − 0.7 × age) to turn your resting heart rate, age, and chosen intensity into a single target training heart rate in beats per minute. Why it matters – Training at the right zone improves cardio efficiency, burns calories, and reduces injury risk. How to read it – The result is the bpm you should aim for during the main set of your workout. If the number is 143 bpm, keep your heart rate around that value for the prescribed interval. Adjust intensity up or down to shift the target higher or lower. Use a heart‑rate monitor or smartwatch to stay within the zone. As you get fitter, your resting rate may drop, automatically lowering the target and keeping training effective.
Pro tips
- Round the result to the nearest whole beat for easier monitoring.
- If you train with a partner, share the target to keep each other on pace.
- Enter intensity as a decimal (0.60‑0.85) – don’t use percent symbols.
- Check your resting heart rate after a full night of sleep for accuracy.
Real-life examples
- A beginner runner wants to know the optimal pace heart‑rate for a 30‑minute jog.
- A cyclist plans interval sessions and needs the exact bpm for each effort level.
- A gym member tracks cardio machines and wants a personalized zone instead of generic charts.
Case study
Emily, 34, entered her 62 bpm resting rate, age 34, and 0.70 intensity. The calculator gave 148 bpm. She trained at that zone for four weeks, saw her 5 k time drop by 2 minutes and felt less winded during hikes.