Max Heart Rate
Compare 7+ MHR formulas: Haskell, Tanaka, Gulati, Gellish, Nes, Oakland, Inbar. Get recommended formula, confidence range.
Max Heart Rate Calculator
Compare formulas. Get recommended formula and confidence range.
✨ Examples — Click to Load
For educational and informational purposes only. Verify with a qualified professional.
Answer Capsule
7 MHR formulas compared: Haskell (220-age), Tanaka, Gulati, Gellish, Nes, Oakland, Inbar. Haskell has ±10-12 bpm standard deviation. Tanaka's 2001 meta-analysis of 351 studies is more accurate. Actual MHR varies by ±7% even with lab testing.
📋 Key Takeaways
- • Haskell 220-age came from a 1970 review of 11 studies—not his own research. Simple but ±10-12 bpm error.
- • Tanaka 208-0.7×age from 2001 meta-analysis of 351 studies. More accurate for most adults.
- • Gulati (206-0.88×age) is women-specific. Use for female athletes.
- • Lab-tested max HR beats any formula. Individual variation ±7%.
💡 Did You Know?
Haskell's 220-age formula came from a 1970 review of 11 studies—NOT his own research. It was a rough approximation that stuck.
— Fox et al. 1971
Haskell has ±10-12 bpm standard deviation. For a 40yo, that's 168±12 = 156-180 bpm range—huge for training zones.
— ACSM
Tanaka's 2001 meta-analysis of 351 studies found 208 - 0.7×age. More accurate across ages 18-81.
— Tanaka et al. 2001
Actual MHR varies by ±7% even with lab testing. Genetics, fitness, and measurement conditions all matter.
— Journal of Exercise Physiology
Gulati formula (206-0.88×age) was derived from 5,437 women. Women may have slightly different age decline than men.
— JAMA Internal Medicine 2010
Max HR is largely genetic and age-dependent. Fitness improves stroke volume and resting HR, not max HR.
— American Heart Association
📖 How It Works
Formula Comparison
Each formula estimates max HR from age. Women: use Gulati. Seniors: Tanaka or Oakland. Young athletes: Nes. Compare all to see the range.
Confidence Range
The min-max across formulas is your confidence range. Your true max HR likely falls within it. Lab or field test for precision.
🎯 Expert Tips
✅ Use Lab Test If Available
A graded exercise test gives your true max HR. Formulas are estimates. If you have a tested value, use it.
👩 Women: Gulati
Gulati was derived from 5,437 women. More accurate than Haskell or Tanaka for female athletes.
📊 Use the Range
Training zones span 10-20 bpm. Use the confidence range—don't fixate on one number. Adjust based on perceived effort.
🧓 Seniors: Tanaka/Oakland
Haskell underestimates in older adults. Tanaka and Oakland/Londeree include more older subjects.
⚖️ Formula Comparison
| Formula | Women | Seniors | Accuracy |
|---|---|---|---|
| Haskell | ⚠️ | ❌ | ⚠️ |
| Tanaka | ✅ | ✅ | ✅ |
| Gulati | ✅ | ⚠️ | ✅ |
| Gellish/Oakland/Inbar | ✅ | ✅ | ✅ |
📊 Infographic Stats
📚 Official Sources
📸 Screenshot Summary
The calculator displays all 7 formulas side-by-side in a bar chart, plus average, confidence range (min-max across formulas), and recommended formula based on your age and gender. The terminal panel shows the same data in a CLI-style layout. Use the recommended formula for your target heart rate calculations.
⚠️ Disclaimer: Formulas are estimates. Individual variation ±10-12 bpm. Consult a physician before intense exercise. Not a substitute for medical advice. If you have heart conditions, get clearance before testing max HR.