Target Heart Rate Calculator

Calculate your target heart rate zones for optimal cardiovascular exercise.

How Target Heart Rate Is Calculated

Target heart rate zones help you exercise at the right intensity for your goals.

Karvonen Formula (with Resting HR)

THR = ((MHR - RHR) x Intensity%) + RHR. This method accounts for your fitness level by using your resting heart rate.

Direct % of Max HR (without Resting HR)

THR = MHR x Intensity%. Simpler but less personalized.

Heart Rate Zones

Zone% of Max HRBenefit
Warm-up50-60%Recovery & warm-up
Fat Burn60-70%Fat burning & endurance
Cardio70-80%Cardiovascular fitness
Anaerobic80-90%Speed & performance
Maximum90-100%Peak performance (short bursts)

About this Calculator

The Target Heart Rate Calculator is a free, easy-to-use tool for heart rate, cardio, zone. Simply enter your values and get instant, accurate results — no signup, no ads, no tracking. All calculations run locally in your browser, so your data stays completely private.

Privacy Note: All calculations are performed locally in your browser. No data is ever sent to a server or third party.