The SI derived unit for volume is the cubic meter. 1 cubic meter is equal to 264.172051242 gallon, or 1000 litre. Note that rounding errors may occur, so always check the results.
Snoring is a common problem, caused by a blockage of the nasal passages during sleep. Snoring can be a sign of a serious problem called sleep apnea, where you stop breathing for 10 seconds or more during sleep. There are two types of doctors who treat snoring problems: sleep medicine doctors and otolaryngologists (ear, nose and throat doctors). (AndreyPopov/iStock/Getty Images)
If you have chronic snoring that is loud enough to wake a bed partner, talk to your doctor. Like snoring, the most definitive sign of sleep apnea -- waking up to breathe -- is often witnessed by a bed partner. People with sleep apnea frequently wake up for a few seconds to gasp for air. This can happen hundreds of times a night in people with severe sleep apnea, Owens says.