Compare calculators

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

Training Zone Calculator

Calculate your personalized heart rate training zones using the Karvonen or percentage-of-max-HR method. Use it when structuring your weekly runs to target specific fitness adaptations.

Age (years)

Resting Heart Rate (bpm)

Max Heart Rate (optional) (bpm)

Calculation Method

Fill in the required fields to see your result.

Running

Treadmill Pace Converter

Converts treadmill speed (MPH or KPH) to running pace (per mile or per km) while accounting for incline grade. Ideal for translating treadmill display numbers into the pace metrics runners track outdoors.

Treadmill Speed (mph)

Incline Grade (%)

Speed Unit

Pace Unit

Fill in the required fields to see your result.

Key differences

	Training Zone Calculator	Treadmill Pace Converter
Category	Running	Running
Inputs required	4	4
Result	Tempo Training Zone (bpm)	Equivalent Pace (min/mile)
What it does	Calculate your personalized heart rate training zones using the Karvonen or percentage-of-max-HR method. Use it when structuring your weekly runs to target specific fitness adaptations.	Converts treadmill speed (MPH or KPH) to running pace (per mile or per km) while accounting for incline grade. Ideal for translating treadmill display numbers into the pace metrics runners track outdoors.