"I Won't Last a Day Without You" is a song by the Carpenters with lyrics written by Paul Williams and music composed by Roger Nichols. It was released in the U.K. in September 1972, paired with "Goodbye to Love" as a double-A side. The single reached No. 9 and spent 14 weeks on the chart. It was later released in the U.S. and became a hit single for them in 1974, reaching No. 11 on the Billboard Hot 100 chart and number one on the easy listening chart. It was the Carpenters' ninth No. 1 on the easy listening chart.