Caliber is a distinctive boys' name in United States, ranking #8871 in 2015 with 8 recorded births. This places Caliber in the bottom 37% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2016 with 26 births ranking #4005. In 2015, approximately 1 in every 239,532 boys born was named Caliber. FALLING Recent data shows the name is currently falling.