Target Heart Rate Zones Calculator (Karvonen HRR)

Determine Heart Rate Reserve and Zones 1–5 training beats per minute.

Karvonen Target Heart Rate
154.2 bpm
Zone 2 Aerobic (60–70% HRR) 141.64 bpm
Zone 3 Tempo (70–80% HRR) 154.2 bpm
Zone 4 Threshold (80–90% HRR) 166.76 bpm
Tanaka Max HR 185.6 bpm
Inputs
years
Age in years (used to estimate Tanaka HRmax = 208 − 0.7 × age).
bpm
Morning resting heart rate in beats per minute (bpm).
% HRR
Target exercise intensity as % of Heart Rate Reserve.
Results & Graph
Karvonen Target Heart Rate
154.2 bpm
Zone 2 Aerobic (60–70% HRR)
141.64 bpm
Zone 3 Tempo (70–80% HRR)
154.2 bpm
Zone 4 Threshold (80–90% HRR)
166.76 bpm
Tanaka Max HR
185.6 bpm

Karvonen Target Heart Rate

Graph 1 • Age Sensitivity Recalculates the domain equation across 50% to 150% of the primary input while holding other parameters constant.
0 bpm 87.8 bpm 175.6 bpm 50%: 162.6 bpm 162.6 50% 75%: 158.4 bpm 158.4 75% 100%: 154.2 bpm 154.2 100% 125%: 150 bpm 150 125% 150%: 145.8 bpm 145.8 150%
Graph 2 • Primary & Supporting Metric Comparison Compares the primary output alongside supporting domain benchmarks.
Karvonen Target Heart Rate 154.2 bpm Zone 2 Aerobic (60–70% HRR) 141.64 bpm Zone 3 Tempo (70–80% HRR) 154.2 bpm Zone 4 Threshold (80–90% HRR) 166.76 bpm
Graph 3 • Exact Output Table & Units Displays each calculated output in its exact domain unit.
Karvonen Target Heart Rate154.2 bpmZone 2 Aerobic (60–70% HRR)141.64 bpmZone 3 Tempo (70–80% HRR)154.2 bpmZone 4 Threshold (80–90% HRR)166.76 bpmTanaka Max HR185.6 bpm
Summary: At 75% Heart Rate Reserve (HRmax 186 bpm, HRrest 60 bpm), target heart rate is 154 bpm.
Summary: At 75% Heart Rate Reserve (HRmax 186 bpm, HRrest 60 bpm), target heart rate is 154 bpm.

Formula & Mathematical Methodology: Heart Rate Zones Reference Equation

TargetHR = ((maxHR − restingHR) × intensityPct) + restingHR
TargetHR = ((maxHR − restingHR) × intensityPct) + restingHR
  • age: Age (years)
  • restingHr: Resting Hr (bpm)
  • intensityPct: Intensity Pct (% HRR)

Rounding: Intermediate calculations retain full IEEE-754 floating-point precision; displayed clinical and fitness metrics round to 1 or 2 decimal places.

Worked Example: Benchmark Scenario: Heart Rate Zones

Determine Heart Rate Reserve and Zones 1–5 training beats per minute.

  1. Enter your current anthropometric, laboratory, or training measurements in the units indicated.
  2. Substitute the values into the reference formula: TargetHR = ((maxHR − restingHR) × intensityPct) + restingHR.
  3. Compare the primary output and supporting thresholds across all three custom SVG charts.
Result: Evaluates Heart Rate Zones using TargetHR = ((maxHR − restingHR) × intensityPct) + restingHR.

Frequently Asked Questions

How is the Target Heart Rate Zones Calculator (Karvonen HRR) calculated?

It evaluates TargetHR = ((maxHR − restingHR) × intensityPct) + restingHR using your entered parameters and displays supporting clinical or training thresholds alongside three interactive SVG visualizations.

Can I compare multiple scenarios side by side?

Yes. Click the Compare button in the results panel to pin up to 3 input scenarios and inspect how changing any parameter shifts the outcome.

Are my health or fitness inputs stored on any server?

No. Every calculation executes 100% inside your browser tab so sensitive health and wellness numbers never leave your device.

Health & Fitness • Endurance & Cardio Guide

How to Use the Target Heart Rate Zones Calculator (Karvonen HRR): Practical Guide & Visual Analysis

Calculate Target Heart Rate using the Karvonen Heart Rate Reserve (HRR) method and Tanaka maximum heart rate equation. Adjust the inputs above to view instant numerical outputs, three custom domain-specific SVG graphs, and reference methodology. Whether you are researching target heart rate zones calculator (karvonen hrr), heart rate zones, target heart rate zones, endurance & cardio calculator, this interactive tool helps you calculate Target Heart Rate using the Karvonen Heart Rate Reserve (HRR) method and Tanaka maximum heart rate equation.

Interpreting the 3 Custom Visual Graphs & Key Outputs

As you adjust Age, Resting Hr, Intensity Pct, the calculator immediately computes Primary physiological or clinical metric, Supporting reference benchmarks, 3-Panel custom domain SVG visualization and updates all three domain-specific SVG charts in real time. Instead of relying on a single static figure, you can inspect the primary domain diagram, component breakdown, and multi-point trajectory curve to see how changing your inputs shifts the final result. Use the Compare (up to 3 scenarios) button to evaluate side-by-side variations before making a decision.

Real-World Benchmark & Planning Tips (Global Clinical & Exercise Physiology Reference)

In our benchmark scenario (Benchmark Scenario: Heart Rate Zones), Evaluates Heart Rate Zones using TargetHR = ((maxHR − restingHR) × intensityPct) + restingHR. Keep in mind that uses peer-reviewed population equations and standard physiological constants. For related calculations in Health & Fitness, explore BMI Calculator (Body Mass Index), Calorie Needs & TDEE Calculator, Body Fat (US Navy), Lean Body Mass & Body Surface Area Calculator.