Target Heart Rate Calculator

Example data

This table shows a realistic example and the expected output range.

Formula used

These are estimation formulas. A clinical test provides the most accurate maximum heart rate.

How to use this calculator

1. Enter your age. Optionally record resting HR after waking.
2. Select a method and a max heart rate formula.
3. Pick a goal preset, or set custom intensity values.
4. Press Calculate. Review your target range and zones.
5. Download results as CSV or PDF when needed.

Why target heart rate matters

Target heart rate turns “work hard” into measurable intensity. Staying inside a zone helps balance stimulus and recovery, especially for steady cardio. When effort is too low, adaptations slow. When it is too high, fatigue rises and form breaks down. This calculator converts age, resting pulse, and chosen intensity into a clear beats‑per‑minute range you can follow.

Selecting a max heart rate formula

Max heart rate is estimated, not directly measured here. The Fox formula (220 − age) is simple and widely used. Tanaka (208 − 0.7×age) often gives a slightly higher value in older adults. Gellish and Inbar provide additional options for comparison. For example, at age 60, Fox estimates 160 bpm while Tanaka estimates 166 bpm, changing every zone.

Karvonen versus percent of max

Two methods are supported. Percent of max multiplies max heart rate by your intensity percent. Karvonen uses Heart Rate Reserve, defined as max heart rate minus resting heart rate, then adds resting heart rate back. This often personalizes results for people with unusually high or low resting pulse. With age 30 and resting 60, a 70–80% Karvonen range is 158–169 bpm.

Reading zones for training goals

Zones are shown as standard percentage bands. Warm‑up supports circulation and technique. Fat burn reflects comfortable endurance where you can speak in sentences. Aerobic builds base fitness and improves efficiency. Anaerobic and VO₂ max bands are harder efforts used for intervals. Use the goal preset for quick setup, then fine‑tune the custom fields to match your program.

Quality checks and practical tips

Record resting heart rate after waking for the cleanest input. If your watch shows large drift during heat, dehydration, or stress, treat numbers as guidance, not a rule. Choose rounding based on how precisely your device reports beats. If your target range feels mismatched, try another formula and compare zones side‑by‑side, then adjust intensity gradually over weeks.

Keep a short log of sessions: average heart rate, duration, and perceived effort. Over time, hitting the same pace at a lower heart rate signals improving efficiency, and your zones may deserve recalibration every few months.

FAQs

What intensity should beginners choose?

Most beginners start around 60–70% for steady cardio. Use a pace that allows short sentences without gasping. If you feel overly fatigued, reduce intensity or shorten duration, then progress gradually as recovery improves.

Do I need a resting heart rate value?

Resting heart rate is required only for the Heart Rate Reserve method. If you choose percent of max, it is not used. Measure after waking, before caffeine, and average several mornings for a stable number.

Which max heart rate formula should I pick?

No single formula fits everyone. Tanaka may estimate higher values for older adults, while Fox is simpler and common. Pick one method, compare the resulting zones, and stay consistent so your training log remains comparable.

Why do my zone numbers change with the method?

Heart Rate Reserve adds your resting heart rate back after applying intensity to the reserve. This shifts zones upward for low resting pulse and downward for high resting pulse. Percent of max ignores resting heart rate, so results differ.

How accurate are target heart rate estimates?

They are practical estimates, not medical measurements. Real max heart rate can vary widely between people of the same age. Use perceived effort, breathing, and recovery as checks, and consult a clinician if you have symptoms.

When should I recalculate my target range?

Recalculate after major training changes, weight loss, medication changes, or if your resting heart rate shifts. Many people review settings every few months. Consistency matters, so avoid changing formulas too often without a reason.