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Max Heart Rate Calculator.

Estimates your maximum heart rate based on age using the common Fox formula (220 minus age).

Results update live as you type.
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Your inputs

How it works

  1. 1

    Enter your age in years.

  2. 2

    The calculator subtracts your age from 220.

  3. 3

    The result is your estimated maximum heart rate in beats per minute.

220 - age

Frequently asked questions

What is the Fox formula?

It's a simple estimate: Max HR = 220 - age. It's widely used but may vary by individual.

Is this accurate for everyone?

No, it's a rough estimate. Actual max heart rate can vary by fitness level, genetics, and other factors.

How can I use this for training?

You can calculate training zones as percentages of your max heart rate, e.g., 60-70% for moderate intensity.

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Results

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Estimated Max Heart Rate

190bpm

Ask Anything

Estimate for general guidance only — verify important decisions with an appropriate professional.

How it works

Estimates your maximum heart rate based on age using the common Fox formula (220 minus age).

  1. Enter your age in years.
  2. The calculator subtracts your age from 220.
  3. The result is your estimated maximum heart rate in beats per minute.

Formulas

The math behind this calculator, written out so you can verify the result.

Fox Formula

Max HR = 220 - age

A simple age-based estimate of the maximum heart rate.

Example:

Input: Age = 30

Calculation: 220 - 30

Result: 190 bpm

Real-world use cases

Where this calculation shows up in everyday life.

Set Training Zones

Determine your heart rate zones for different workout intensities.

Example: Zone 2: 60-70% of max HR

Monitor Exercise Intensity

Ensure you're working at the right effort level during cardio.

Example: Stay below 85% of max HR for most workouts

Tips and common mistakes

Tips

  • Use a heart rate monitor for more accurate readings.
  • Reassess your max HR as you age or if your fitness changes.
  • Consult a professional for personalized advice.

Common Mistakes to Avoid

  • Assuming the formula is exact for everyone.
  • Using max HR to set unsafe exercise targets without medical clearance.

Assumptions and limitations

  • Use the stated inputs and units.
  • Results are estimates for planning and education.
  • Check measurements and source data before making an important decision.