Wth

Wth or WTH may be:
 * a rare abbreviation for Watt-hour
 * the ISO 639-3 code of the Wathawurrung language
 * an internet slang abbreviation for "what the hell" or "what the heck"
 * the Amtrak station code for Winter Haven station, Florida, United States
 * the National Rail station code for Whitehaven railway station, Cumbria, England
 * an abbreviation for whole-tree harvest, a forestry practice similar to whole-tree logging