Cycling Hr Calculator

Background.

Heart rate is the cyclist's most widely available gauge of effort. Power meters cost money and speed means little on a hilly or windy road, but a chest strap or watch reports how hard the heart is working on any bike, anywhere. The difficulty is knowing what number to aim for, because 150 beats a minute is an easy spin for one rider and close to flat out for another.

The band here is personalised in two steps. First it predicts your maximum heart rate from age with the Tanaka equation, 208 − 0.7 × age, published in 2001 from a meta-analysis of maximal heart-rate studies. Then it applies the Karvonen method: subtract your resting heart rate from that maximum to get your heart-rate reserve — the beats actually available for exercise — take the chosen percentages of it, and add the resting rate back on. Because your resting pulse is built in, a well-trained rider with a slow heart at rest gets targets that reflect it.

The starting values of 65% and 85% of reserve frame a steady but demanding aerobic ride. Move them to fit the session: a lower pair for recovery spins, a higher pair for threshold intervals.

The maximum is only a prediction. Individuals can sit 10 or more beats a minute above or below it, and many riders find their highest heart rate on the bike runs a few beats under their running maximum because less muscle is working. A reliable maximum from a hard test or race beats any formula. Beta-blockers and some other medicines, illness, heat and dehydration all shift heart rate, and the band is a training guide, not a medical safety limit.

What is cycling hr calculator?

A cycling heart-rate band is the range of beats per minute that corresponds to a chosen share of your heart-rate reserve. Heart-rate reserve is the gap between your maximum heart rate and your resting heart rate, so riding at 65% of reserve means your pulse has climbed 65% of the way from rest to maximum. The page reports the lower and upper ends of the band, plus the age-predicted maximum it is built on, all in beats per minute.

How to use this calculator.

1. 01Enter your Age in years. It sets the predicted maximum, which falls by 0.7 beats a minute for every year.
2. 02For Resting heart rate, count your pulse for a full minute just after waking, before getting out of bed, on three or four mornings and average them. A watch's overnight resting figure is a reasonable substitute.
3. 03Set the Lower and Upper heart-rate-reserve intensity as percentages, with the upper above the lower. 65 and 85 cover steady aerobic riding; shift or narrow the pair to target a particular kind of session.
4. 04Ride to the band but allow for lag: on short efforts heart rate takes a minute or more to catch up, and on long or hot rides it creeps upward even at a steady effort.

The formula.

Two equations run in sequence. The Tanaka equation predicts maximum heart rate: HRmax = 208 − 0.7 × age. Heart-rate reserve is HRR = HRmax − resting HR, and the Karvonen equation turns each chosen percentage into a target: target = resting HR + (intensity ÷ 100) × HRR. The 208 and 0.7 are the intercept and slope Tanaka and colleagues fitted to age and measured maxima. Compared with the older 220 − age rule, Tanaka gives the same answer at 40, slightly less below that age and more above it — 166 against 160 at age 60. Resting rate plays a double role: it shrinks the reserve but is added back, so a lower resting rate pulls the lower target down more than the upper one. A resting rate at or above the predicted maximum is refused, since it would leave no reserve.

A worked example.

Frequently asked questions.

References& sources.

1. [1]Tanaka, Monahan and Seals. Journal of the American College of Cardiology 2001. Age-predicted maximal heart rate meta-analysis. Retrieved 2026-08-06.
2. [2]U.S. National Library of Medicine. PubMed record current 2026-08-06. Indexed derivation and validation literature. Retrieved 2026-08-06.
3. [3]World Health Organization. Patient safety resources current 2026. Clinical decision-support safety context. Retrieved 2026-08-06.