Quick Answer
Yes, you can estimate distance traveled with an altimeter by tracking changes in altitude and using the device's average ascent rate.
Understanding Altimeter Readings
An altimeter measures the difference in atmospheric pressure between the current location and a reference point, usually sea level. This difference is converted into a height above sea level, which is displayed on the device. To estimate distance traveled, you need to know the average ascent or descent rate, which depends on the terrain and the device’s accuracy.
Calculating Ascent Rate
A typical hiking ascent rate is around 200-300 feet per minute (fpm), but this can vary greatly depending on the terrain. For example, climbing a steep mountain might result in an ascent rate of 1,000 fpm, while walking uphill on a gentle slope might result in an ascent rate of 100 fpm. To calculate the ascent rate, note the altimeter reading at regular intervals, such as every 5-10 minutes. Divide the change in altitude by the time interval to get the ascent rate in fpm.
Estimating Distance Traveled
To estimate distance traveled, multiply the average ascent rate by the time of travel. For example, if you ascend 500 feet in 10 minutes with an average ascent rate of 500 fpm, you can estimate the distance traveled as 500 feet * (10 minutes / 60 minutes) = 0.83 miles. Keep in mind that this method assumes a consistent ascent rate, which may not be the case on uneven terrain. To improve accuracy, consider using a combination of altimeter readings and pace tracking to estimate distance traveled.
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