Compare calculators

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

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.

Running

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.

Key differences

	Running Race Equivalency Calculator	Altitude Running Adjustment Calculator
Category	Running	Running
Inputs required	4	5
Result	Predicted Race Time (minutes)	Adjusted Time (seconds)
What it does	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.	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.