Caliber is a distinctive boys' name in United States, ranking #9773 in 2011 with 7 recorded births. This places Caliber in the bottom 32% 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 2011, approximately 1 in every 271,284 boys born was named Caliber. FALLING Recent data shows the name is currently falling.