"That's What Love Is For" is a 1991 Billboard Adult Contemporary chart #1 hit single and a Billboard Hot 100 top 10 single by Christian music singer Amy Grant. It was the third pop single off her 5x platinum selling album Heart in Motion and the only one from the album to be released both to secular and Christian radio. It was the second Christian radio single.

In the United States the song was #1 for 3 weeks on Billboard's Adult Contemporary chart, spending 13 weeks in the Top 10 and 32 weeks on the chart overall. It peaked at #7 on the Hot 100 where it spent 4 weeks in the Top 10, and also reached #4 on the R&R CHR Chart.

In the United Kingdom, the single peaked at #60 on the Official UK Chart.

A music video was produced to promote the single, and mixes shots of Grant wearing a red cloak and singing to the camera, while other shots of her singing are in black and white. It also features a male/female couple, sitting together on a bench but not looking at each other. At the 3:12 mark of the video (just after Grant sings the bridge leading into the last chorus), the couple are seen in black and white, holding each other loosely while the music plays and Grant sings. The video fades out on a shot of Grant singing ad-libs in front of a sepia-toned background. Off in the distance is the man, and further off, presumably the woman. Behind them all are four large letters which spell the word "LOVE".

Remixes (feat. Chris Cox) – EP

U.S. Promotional A&M CD Single

U.S. Myrrh promotional CD single

U.K. retail single

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