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Max Heart Rate Calculator

Maximum heart rate estimate (220 − age). Free online Max Heart Rate Calculator for health — instant, accurate results, mobile-friendly, no signup needed.

HR_max ≈ 220 − age (Fox formula).
Max HR (bpm)
190

Derivation

  1. ├── 01Givenage = 30
  2. ├── 02Formula220-e.age
  3. ├── 03Substitute220-e.30
  4. └── 04Compute Max HR (bpm)190
Did you know?

The "220 − age" max-heart-rate rule (Karvonen, 1957) is a population average with a ±12 bpm standard deviation — a lab VO₂ test is the only truly individual answer.

§01What is

Understanding the Max Heart Rate Calculator

The Max Heart Rate Calculator computes Max HR (bpm) from 1 input: age. Maximum heart rate estimate (220 − age).

Health metrics give us objective checkpoints against a body that can feel unreliable. Used alongside professional guidance — not in place of it — these numbers help you track progress and spot trends that matter. The Max Heart Rate Calculator sits in that toolkit — it maximum heart rate estimate (220 − age). Enter your numbers above and the result updates instantly; every step of the math is shown in the Derivation panel so you can see exactly how the answer was reached.

§02The Formula

How it’s calculated

220-e.age

Where

age
Age
§03Practical Example

Step-by-step walkthrough

Scenario

Apply the formula to a realistic set of inputs: Age = 30.

  1. 01Start by noting the input — Age: 30.
  2. 02Substitute these values into the formula: 220-e.age
  3. 03Compute Max HR (bpm): the calculator returns 190.
  4. 04Cross-check the answer by opening the Derivation panel above — every line of math is shown so you can follow the computation end-to-end.
§04Variants

Common Max Heart Rate Problems

The formula gets rearranged depending on which variable you need. Here are the patterns you’ll run into in the real world — find the one that matches your problem and follow the worked steps.

01 · PATTERN

Age halved

age = 15 (from 30)

Keep every other input at its default and halve the age. See how max hr (bpm) responds.

  1. 01New Age: 15
  2. 02Baseline Max HR (bpm): 190
  3. 03New Max HR (bpm): 205
  4. 04Max HR (bpm) increases by 7.9% → use this sensitivity to plan for real-world variation.
02 · PATTERN

Age doubled

age = 60 (from 30)

Keep every other input at its default and double the age. See how max hr (bpm) responds.

  1. 01New Age: 60
  2. 02Baseline Max HR (bpm): 190
  3. 03New Max HR (bpm): 160
  4. 04Max HR (bpm) decreases by 15.8% → use this sensitivity to plan for real-world variation.
§05FAQ

Frequently asked questions

Yes. The calculator implements the standard formula as documented and returns exact floating-point results. No approximations are used unless noted in the formula.
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