Max Heart Rate Calculator
Estimate the highest heart rate your body can safely reach during exercise.
Your maximum heart rate (MHR) is the highest number of beats per minute your heart can achieve during all-out effort. It is the anchor number coaches use to set heart-rate training zones, monitor intensity, and gauge fitness progress.
This calculator uses two scientifically validated formulas: the Tanaka formula (208 − 0.7 × age), derived from a meta-analysis of 351 studies, and the Gulati formula (206 − 0.88 × age), developed specifically for women. Both are more accurate than the classic 220 − age rule.
These are estimates with a typical standard deviation of about ±10 bpm. Use them as a starting point and adjust based on how you feel during training.
Calculate your MHR
How the calculation works
The classic 220 − age formula is the most widely known, but research shows it can over- or under-estimate by more than 10 beats per minute in many people. The Tanaka and Gulati equations were developed from much larger, more specific datasets and are now preferred by exercise physiologists.
The formulas:
Tanaka: MHR = 208 − (0.7 × age)
Gulati: MHR = 206 − (0.88 × age)
Tanaka et al. (2001) pooled data from 351 studies involving over 18,000 participants to derive their formula. It is particularly accurate for older adults, where the classic 220 − age rule tends to underestimate true max heart rate. The Tanaka equation is now the recommended default for men and for general clinical use.
Gulati et al. (2010) studied 5,437 healthy women and found that the standard formulas consistently over-predicted max heart rate in females. Their women-specific equation (206 − 0.88 × age) provides a better fit and is the one cardiologists and exercise physiologists recommend for female patients.
Quick reference table
| Age | Tanaka (men / general) | Gulati (women) |
|---|---|---|
| 20 | 194 bpm | 188 bpm |
| 25 | 191 bpm | 184 bpm |
| 30 | 187 bpm | 180 bpm |
| 35 | 184 bpm | 175 bpm |
| 40 | 180 bpm | 171 bpm |
| 45 | 177 bpm | 166 bpm |
| 50 | 173 bpm | 162 bpm |
| 55 | 170 bpm | 158 bpm |
| 60 | 166 bpm | 153 bpm |
| 65 | 163 bpm | 149 bpm |
| 70 | 159 bpm | 144 bpm |
Using your max heart rate in training
Once you know your estimated MHR, you can set heart-rate training zones. As a rough guide:
- Zone 1 (50–60% MHR): Recovery and warm-up — very light effort.
- Zone 2 (60–70% MHR): Aerobic base — comfortable pace you can sustain for long periods. Great for fat loss and endurance.
- Zone 3 (70–80% MHR): Tempo — moderate to hard effort, improves aerobic fitness and lactate threshold.
- Zone 4 (80–90% MHR): Threshold — hard effort, sustainable for minutes but not hours. Builds speed and power.
- Zone 5 (90–100% MHR): VO₂ max — all-out effort for short bursts. Improves maximal cardiovascular capacity.
Heart-rate zones are powerful, but they are estimates. Factors like fitness level, medications (especially beta-blockers), heat, and fatigue can shift your actual training zones. Listen to your body and, if possible, verify with a submaximal or maximal exercise test supervised by a professional.
A note on accuracy
No formula can predict an individual's true max heart rate perfectly. The standard deviation for both the Tanaka and Gulati equations is around ±10 bpm, meaning roughly two-thirds of people will fall within 10 beats of the estimate. Use the number as a guide, then fine-tune your zones based on perceived exertion and real-world training data from a heart-rate monitor.
Want to pair heart-rate training with nutrition? Try our Daily Energy Needs Calculator to dial in your calories alongside your cardio plan.