Inflection Maximal Aerobic Speed Calculator

Browser ready No spreadsheet or PDF application is required. Enter the one-mile time-trial result and the training targets update immediately.

Enter information

Gold fields are editable

Athlete name

Date

One-mile time: minutes

Enter 3 to 20 minutes.

One-mile time: seconds

Enter 0 to 59 seconds.

Estimated MAS -- mph

Estimated MAS -- km/h

Estimated MAS -- m/s

Test pace -- /mi

Running intensity reference bands

BandIntensityPace targets

1Recovery60–70% MAS ----

2Aerobic base70–80% MAS ----

3Tempo80–90% MAS ----

4Aerobic power90–100% MAS ----

5Supramaximal100–110% MAS ----

How to use it

Complete a properly paced, maximal one-mile time trial.
Enter the finishing time in minutes and seconds.
Use the pace bands with the prescribed session intent.

Calculation method

Average one-mile speed is used as an estimate of maximal aerobic speed. Each reference band is calculated as a percentage of that speed. Pace is shown per mile with an equivalent 400 m split.

Use with context

A one-mile result estimates MAS rather than directly measuring the minimum speed that elicits VO₂max. Terrain, weather, pacing, fatigue, and testing conditions can influence the result. Use coach guidance when prescribing interval duration and recovery.