General Cottage Q&A: How can we know how much propane is left in the tank if we don’t have a gauge? By Cottage Life Published: August 27, 2025 share Share on Facebook Share on Twitter Share on Pinterest Copy Link Cancel We have a trick just for that! Senior editor Alysha Vandertogt explains how to test remaining propane levels courtesy of a little science. Related Story Cottage Q&A: Despite a new gas tank, my grill won’t light. Why not? Related Story Cottage Q&A: How to extend the life of your grill Related Story 6 old-school barbecue techniques that will up your grill game this summer