Not all tanks have gauges. If your tank has a gauge, it is located on the top of the tank, usually under a lid or hood which can be lifted up to view the gauge. Look for a gauge dial with numbers from 5 to 95. The numbers indicate the percentage of propane in the tank. For your convenience and comfort, please call our customer care center (link to Contact Us page) if your gauge reading measures less than 30%. Some tanks also have a pressure gauge with numbers from 0 to 300. Do not read this gauge because the pressure reading does not reflect the volume of propane in your tank. Please visit our "Reading the Tank Gauge" page for more information.