What the convention fixes
Nothing is fixed, and that is the finding. Three different quantities circulate under similar names:
Peak horsepower is the most the motor can produce momentarily, typically at the moment of starting under load. It is the largest number available and the most commonly printed.
Continuous horsepower, usually abbreviated CHP, is what the motor sustains without overheating. On the same motor it is substantially lower than peak, and it is the figure that describes running rather than starting.
Wattage appears too, sometimes as what the machine draws from the socket and sometimes as what the motor delivers, and the two differ by the motor’s efficiency.
No body publishes rules for which a listing must use, which is why a shelf of treadmills presents a row of numbers that cannot be lined up.
What it does not promise
It does not promise a speed. What a treadmill can sustain under a running person depends on the motor, the belt, the deck, the rollers and the mass on it — and the speed dial’s top figure is a separate claim entirely.
It does not promise durability. Motor rating is not a service life, and the parts that fail on cheap treadmills are frequently the belt, the deck and the controller rather than the motor.
It does not promise quiet running, which is a function of the roller diameter, the deck and the enclosure at least as much as the motor.
And it does not promise anything comparable between machines unless both makers published the same quantity.
What it works with
It works with the running surface dimensions — belt length and width in centimetres — which decide what stride the machine actually accommodates, and which are the figures this site leans on hardest. A short belt with a large motor is a walking pad, whatever the dial says.
It works with the maximum user weight, since the motor rating assumes a load.
And it works with the roller diameter where a maker publishes it, because larger rollers reduce belt wear and motor strain together.
How we read it on this site
The figure is reported with the qualifier the maker used — peak, continuous, or none — and the page says which. Where a listing gives a bare horsepower number with nothing beside it, the page records that the maker does not specify which measurement it is, and does not treat it as continuous.
No page here converts peak to continuous, watts to horsepower as though the input and output questions were settled, or ranks two treadmills on motor figures that describe different quantities.
Questions readers send in about this
What does CHP mean?
Continuous horsepower — the power a motor is rated to sustain rather than reach briefly. It is the more informative of the two figures and the less often quoted. Where a maker publishes it, a page here says so explicitly, because the distinction is the whole point.
Is a 3 HP treadmill better than a 2.5 CHP one?
The comparison cannot be made from those two labels, because they are not the same quantity. A peak figure and a continuous figure describe different things, and putting them side by side as though they were interchangeable is the error this page exists to name.
Does wattage help?
It can, if the maker says whether it is input or output. Input wattage is what the machine draws from the wall and includes losses; output is what reaches the belt. A page here reports the figure with whichever qualifier the maker published, and records the absence when there is none.
Last reviewed 20 September 2026