Health & Fitness

Heart Rate Zone Calculator

From your age it estimates max heart rate as 220 minus age, then shows three training zones as bpm ranges: Zone 2 (60-70 percent), Zone 3 (70-80 percent) and Zone 4 (80-90 percent).

What this calculator does

The Heart Rate Zone Calculator estimates your result instantly from the values you enter, using standard health & fitness formulas. From your age it estimates max heart rate as 220 minus age, then shows three training zones as bpm ranges: Zone 2 (60-70 percent), Zone 3 (70-80 percent) and Zone 4 (80-90 percent). Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate rather than a certified or official figure.

Heart Rate Zone Calculator

Result

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Zone 2 Fat Burn (bpm)
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Zone 3 Aerobic (bpm)
—
Zone 4 Threshold (bpm)

About Heart Rate Zone Calculator

The Heart Rate Zone Calculator needs only your age. It estimates maximum heart rate as 220 minus age and then reports three training zones as beats-per-minute ranges: Zone 2 fat burn (60-70 percent), Zone 3 aerobic (70-80 percent) and Zone 4 threshold (80-90 percent).

Formula & Mathematical Calculation

Zone 2 Fat Burn (bpm) = f(Age (years))

Calculated according to standard health formulas implemented in the calculator core.

Calculation Example

For an age of 30, max HR is 220 - 30 = 190. The tool shows Zone 2 = 114-133, Zone 3 = 133-152 and Zone 4 = 152-171, with the note: "Based on a max HR of 190 bpm, zones scale from 60 to 90 percent."

Key Benefits

  • Produces three named training zones from a single age input
  • Bases zones on the 220-minus-age maximum heart rate estimate
  • Shows each zone as a clear low-to-high bpm range

How to Use this Calculator

  1. Enter your age
    Type your age in years into the Age field (for example 30).
  2. Calculate
    Click Calculate to generate the zones.
  3. Read the zones
    Read the Zone 2 Fat Burn, Zone 3 Aerobic and Zone 4 Threshold result boxes, each shown as a bpm range.

Assumptions & Limitations

What the calculation assumes

  • Every value you enter is treated as an exact, known amount.
  • Any rate or interval you enter is assumed to hold for the whole period unless the form asks for it separately.
  • Results use standard published formulas and account only for the values entered above.
  • Rounding is applied for display; the underlying calculation uses your full precision.
  • Results are returned in the same units you enter, unless the tool states the output unit.

What it does not cover

  • Heart Rate Zone Calculator produces a calculated result for reference and learning, not a certified or official measurement.
  • Real-world outcomes differ when tolerances, rounding rules or local standards apply.
  • Definitions and standards vary by region and change over time; verify the convention that applies to your case.
  • Figures are only as accurate as the inputs you supply — check them before acting on the result.
  • For work where the result carries real consequences, confirm it against an authoritative source.

Frequently Asked Questions

Zone 2 is 60-70 percent, Zone 3 is 70-80 percent and Zone 4 is 80-90 percent of the estimated maximum heart rate.

As 220 minus your age. For age 30 that is 190 bpm, which all three zone ranges are derived from.

No. It reports only Zones 2, 3 and 4; the 60 to 90 percent band. Zone 1 and Zone 5 are not displayed.

Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.