How to Calculate Your Target Heart Rate

Your target heart rate is a range of beats per minute that matches a level of effort. People use it to gauge how hard they are working during exercise. Here are two ways to find it, with a worked example and tips for taking your pulse.

The short version: estimate your maximum heart rate from your age, then take a percentage of it for the zone you want. A second method adds your resting heart rate for a more personal figure.

Method one: percent of maximum heart rate

First, estimate your maximum heart rate. The common formula subtracts your age from 220.

Max heart rate = 220 − age

Then pick an intensity band and multiply. General guidance often lists moderate effort at 50 to 70 percent of maximum, and vigorous effort at 70 to 85 percent. These are reference bands, not rules you must hit.

A worked example, step by step

Take a 45-year-old. Work the moderate zone of 50 to 70 percent.

1. Max heart rate: 220 − 45 = 175 beats per minute.
2. Low end: 175 × 0.50 = 88 beats per minute.
3. High end: 175 × 0.70 = 123 beats per minute.

So their moderate zone is roughly 88 to 123 beats per minute. For the vigorous band, 175 × 0.70 = 123 and 175 × 0.85 = 149, so about 123 to 149 beats per minute. The numbers are estimates, since the 220 formula is an average across many people.

Method two: the Karvonen formula

The Karvonen method uses your heart rate reserve, which is the gap between your maximum and your resting heart rate. It often gives a more personal range.

Target = ((max − resting) × intensity) + resting

Say our 45-year-old has a resting heart rate of 65 and wants 60 percent intensity. The reserve is 175 − 65 = 110. Then 110 × 0.60 = 66, and 66 + 65 = 131 beats per minute. That sits inside the moderate band from method one, tuned to their resting rate.

How to take your pulse

To check where you are, find your pulse at your wrist or the side of your neck. Count the beats for 15 seconds, then multiply by 4 for beats per minute. A fitness watch or chest strap does this for you and tracks it as you move.

For a resting reading, measure when you are calm and still, ideally before you get out of bed. That gives a cleaner number for the Karvonen method than a reading taken after coffee or activity.

If you would rather skip the count, the talk test is a simple stand-in. At a moderate effort you can hold a conversation but not sing. At a vigorous effort you can manage only a few words at a time. It is rough, yet it lines up well with the zones and needs no math at all.

Reading the zones sensibly

Zones are information, not a command to push hard. The right intensity depends on your goals, your fitness, and how you feel that day. Lower zones suit easy and recovery sessions, higher zones suit harder efforts. Both have a place.

The 220 formula is a population average, so your true maximum can sit above or below it. If a zone feels wrong for your effort, trust your body and adjust. And if you are new to exercise or have a health condition, check with a doctor before training at higher intensities.

Common mistakes to avoid

• Treating 220 minus age as exact. It is an average, so your real maximum may differ.
• Forgetting to multiply a 15-second count by 4 to get beats per minute.
• Taking a resting reading after coffee or activity, which inflates it.
• Chasing a high zone every session. Easy efforts matter too, and more intensity is not always better.

Frequently asked questions

How accurate is the 220 minus age formula? It is a rough average. Real maximum heart rates vary between people of the same age, so use it as a guide, not a fixed value.

Which method should I use? The percent-of-max method is quick. The Karvonen method adds your resting heart rate, so it can fit you better. Either works as an estimate.

What is a normal resting heart rate? For most adults it falls between 60 and 100 beats per minute. Fit people often sit lower. A single reading is just one data point.

Do I have to exercise in a zone? No. Zones are a guide to effort, not a requirement. Pick the intensity that fits your goals and how you feel, and rest when you need to.

Do I need to do this by hand? No. The formulas are useful to know, but a tool is faster. Use the one below to get your estimated zones from your age in a second.