External Load ACWR Calculator

External Load ACWR Calculator

Understanding External Load

External Load is the total physical work done — typically measured in units like distance, duration, or repetitions. In running, the most common and accessible measure is weekly distance (km).

ACWR (Acute:Chronic Workload Ratio) compares this week's load (acute) with the average of the previous 3 weeks (chronic). This helps determine if you're progressing safely or increasing your risk of injury.

< 0.8
Underload
0.8–1.3
Safe
> 1.3
Overload

Weekly External Load (Distance in km)

Enter the total distance (in km) you completed each week:

Note: This calculator uses total distance only. If your pace varies significantly, consider combining with internal load (e.g. RPE × duration).