Max Heart Rate Calculator

How runners use this tool

This tool gives you a practical starting estimate for maximum heart rate so you can build training zones and compare the main age-based formulas side by side.

1. Enter age to compare the main age-based formulas side by side.
2. Review the different estimates rather than assuming a single formula is universally correct.
3. Use the primary estimate only as a starting point for zones and workout intensity bands.

How to use the result

• Compare your estimated max heart rate with the highest values you have actually seen in races or hard interval sessions.
• Use the estimate to build zones, then refine them once your real training data suggests a better ceiling.
• Avoid forcing workouts to hit a formula-derived number if heat, fatigue, or treadmill drift makes it unreliable.

Formula and assumptions

Common estimates include 220 − age, 208 − 0.7 × age, and 211 − 0.64 × age.

• Population formulas can miss an individual runner’s real maximum by a wide margin.
• A field-tested maximum heart rate is often more useful than an age-only estimate.

Worked examples

• Beginner: Age-only estimate → Primary max HR and zone bands. Provides a practical training starting point.
• Race prep: Compare formulas side-by-side → Tanaka/Fox/Nes/Gulati differences. Shows natural estimation uncertainty before planning zones.
• Advanced: Refine with race data → Adjust estimate toward observed max. Improves long-term zone accuracy.

Common questions