How do you determine the age of Jacob when he wrestled with the angel of the covenant in Genesis 32?

He was about 97 years old. He was born about 1858 BC, when Isaac his father was 60 years old. (Gen 25:26). Jacob was 77 years old when he left Beer-sheba for the land of his foreparents, a land where he spent the next 20 years. (Gen. 28:10, 31:38).