Lactate Threshold (HR)
Calculate Lactate Threshold (HR) instantly with the exact formula and a worked example.
Lactate Threshold (HR)
Maximum heart ratebpm
Threshold as % of maximum (usually 85)%
LT HR
161.5bpm
Zone 1 (recovery)
< 137bpm
Zone 2 (aerobic)
137–144bpm
Zone 3 (tempo)
145–152bpm
Zone 4 (sub-threshold)
153–160bpm
Zone 5a (supra-threshold)
162–165bpm
More about: Lactate Threshold (HR)
What it calculates
The “Lactate Threshold (HR)” calculator computes LT HR in bpm from 2 parameters: maximum heart rate (bpm), threshold as % of maximum (usually 85) (%).
A study aid and exam-prep helper.
Example calculation
With parameters Maximum heart rate = 190 bpm, Threshold as % of maximum (usually 85) = 85 % the result is 161.5 bpm (More accurate: a test — average HR over the last 20 minutes of a 30-minute run).
How to use
- Enter maximum heart rate and threshold as % of maximum (usually 85) — each field above is adjustable with a slider.
- LT HR (bpm) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Lactate Threshold (HR) calculated?
The Lactate Threshold (HR) calculator computes LT HR (in bpm) from maximum heart rate, threshold as % of maximum (usually 85). Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Lactate Threshold (HR) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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