Threshold calculator for endurance sports

Calculate lactate threshold: determine LT1 and LT2 from your step test

Calculate your aerobic and anaerobic thresholds from measured values instead of generic percentage formulas.

Calculate lactate threshold Compare methods

Which lactate threshold do you mean?

Two thresholds matter most in training: LT1 for aerobic endurance and LT2 for the highest controlled sustainable intensity. Both can be derived from a clean lactate curve.

Inputs for the calculation

Pace or watts per stage
Lactate value in mmol/L per stage
Optional: heart rate to classify zones

Threshold analysis output

LT1 as aerobic threshold
LT2 as anaerobic threshold or MLSS-like intensity
Comparison of models such as Mader, Dmax and Dickhuth

From measurements to thresholds

Check the curve

Lactate values are plotted against power or pace.

Calculate models

Several methods identify possible threshold points from your data.

Interpret results

You see which threshold values are plausible and how they affect training.

Why separate LT1 and LT2?

Many training plans use only one threshold. For endurance athletes, LT1 is just as important because it controls the sustainable aerobic base range.

Frequently asked questions

Can lactate threshold be calculated online?

Yes, if you have measurements from a lactate step test. Online means the software handles curve, method comparison and result display.

Is LT2 the same as FTP?

Not exactly. In cyclists, LT2 and FTP are often close, but FTP is a performance estimate while LT2 is derived from lactate values.

Which method is best?

It depends on data quality, sport and curve shape. Method comparison is better than using one generic standard method.