Compare calculators

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

Altitude Running Adjustment Calculator

Estimate how much slower your running pace will be at high altitude compared to sea level. Use this when traveling to a race at a significantly different elevation than where you train.

Sea Level Time (Minutes) (mins)

Sea Level Time (Seconds) (secs)

Current Altitude (feet)

Target Race Altitude (feet)

Acclimatization Level

Fill in the required fields to see your result.

Running

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.

Key differences

	Altitude Running Adjustment Calculator	Heart Rate Training Zones Calculator
Category	Running	Running
Inputs required	5	2
Result	Adjusted Time (seconds)	Zone 2 (Aerobic Base) (bpm)
What it does	Estimate how much slower your running pace will be at high altitude compared to sea level. Use this when traveling to a race at a significantly different elevation than where you train.	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.