West Texas Intermediate (WTI) can refer to a grade or a mix of crude oil, and/or the spot price, the futures price, or the assessed price for that oil; colloquially WTI usually refers to the price of the New York Mercantile Exchange (NYMEX) WTI Crude Oil futures contract or the contract itself. The WTI oil grade is also known as Texas light sweet, although oil produced from any location can be considered WTI if the oil meets required qualifications. Spot and futures prices of WTI are used as a benchmark in oil pricing. This grade is described as light crude oil because of its relatively low density, and sweet because of its low sulfur content.

The price of WTI is often included in news reports on oil prices, alongside the price of Brent crude from the North Sea. Other important oil markers include the Dubai crude, Oman crude, Urals oil, and the OPEC reference basket. WTI is lighter and sweeter, containing less sulfur than Brent, and considerably lighter and sweeter than Dubai or Oman.