How To Read Your Propane Tank Gauge. Most gauges read from 0 to about 90 percent (see why 90 percent and not 100 percent below); Watch this video to learn the simple steps to monitor supply for your home:
A gauge reading of 10 means that the tank is 10 percent full (almost empty). The following video walks you through the steps of reading your propane tanks percentage gauge. If the needle is on 50, your propane tank is 50% full.
While heating oil tanks use fractions, the numbers on the dial indicate the percentage of how full your propane tank is.
The warm water, cool hand method. The following video walks you through the steps of reading your propane tanks percentage gauge. So, when you read your propane tank gauge, use the original tare weight and work out what percentage of fuel you have left to play with. Your tank will be filled to a maximum of 80% (to allow for vapor expansion, which happens in warmer temperatures).