Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Heart Rate Training Zones Calculator

Calculate your personalized heart rate training zones using your resting and maximum heart rate. Designed for distance runners who want to optimize aerobic base, tempo, and interval training intensities.

Resting Heart Rate (bpm)

Maximum Heart Rate (bpm)

Fill in the required fields to see your result.

Running

Running Race Equivalency Calculator

Predict your expected finish time at any race distance using a recent race result. Based on the Jack Daniels equivalency model, it adjusts for the extra fatigue cost of longer distances.

Recent Race Distance

Race Time (minutes)

Target Race Distance

Race Conditions

Fill in the required fields to see your result.

Key differences

	Heart Rate Training Zones Calculator	Running Race Equivalency Calculator
Category	Running	Running
Inputs required	2	4
Result	Zone 2 (Aerobic Base) (bpm)	Predicted Race Time (minutes)
What it does	Calculate your personalized heart rate training zones using your resting and maximum heart rate. Designed for distance runners who want to optimize aerobic base, tempo, and interval training intensities.	Predict your expected finish time at any race distance using a recent race result. Based on the Jack Daniels equivalency model, it adjusts for the extra fatigue cost of longer distances.