How old was Sarah when she died?

Answer: 127 years

Sarah lived to be 127 years old and died at Kiriath-arba (Hebron) in Canaan.

“Now Sarah lived to be 127 years old. She died in Kiriath-arba (that is, Hebron) in the land of Canaan, and Abraham went out to mourn and to weep for her.”— Genesis 23:1-2 (BSB)