Target Heart Rate
Example heart-rate target using a simplified heart-rate reserve model.
Use the calculator below, then review the formula, a numeric example, and the reference table to understand how the target heart rate result is produced.
Educational tool only. It does not replace advice from a licensed clinician, dietitian, or exercise physiologist.
Calculator inputs
Result
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What is this calculator?
This guide supports the Target Heart Rate, a focused resource for people researching target heart rate results and related fitness metrics. The on-page tool keeps inputs simple while the sections below explain the math, a worked example, and reference ranges where they exist. Older adults may prioritize functional metrics—grip strength, gait speed, and waist circumference—alongside classic BMI-style numbers. VO2 and heart-rate reserve estimates help beginners choose moderate intensity before progressing to structured intervals. Ponderal index sometimes appears in neonatal contexts; always confirm the intended age group for any index. Pediatric and adolescent interpretation almost always requires growth charts; a raw index value without age and sex context is incomplete. Sleep debt accumulates across nights; one long weekend rarely reverses weeks of restriction. Ideal weight formulas provide reference anchors, not guarantees of health or performance. Energy calculators are planning tools: track weight trend for two to three weeks, then adjust calories in small steps rather than large jumps. Injury timelines are highly variable; phases overlap, and imaging plus hands-on exam change recommendations. Calorie deficits derived from weekly fat-mass assumptions oversimplify lean mass loss during aggressive dieting. Hydration estimates change with climate, altitude, fever, and exercise duration; treat fluid targets as ranges, not rigid prescriptions. Body adiposity and waist-based ratios add shape information when BMI alone is ambiguous. Activity level multipliers align with PAL textbooks; ultra-endurance lifestyles may sit above typical tables. When Target Heart Rate outputs conflict with how you feel, prioritize clinician review over any website summary.
How it works
Karvonen-style example: THR ≈ HRrest + intensity × (HRmax − HRrest); page uses ~70% HRR illustration.
Example
HRrest 60, HRmax 180 → HRR 120; 70% → THR ≈ 60 + 84 = 144 bpm.
Reference Table
| Value | Meaning |
|---|---|
| Moderate | ~50–70% |
| Hard | ~70–85% |
| Very hard | Short bursts |
FAQ
- RPE scale?
- Afib?
- Warm-up?
- Fat-burn zone myth?