Fluoroboric acid wani nau'in acid ne na inorganic tare da dabarar sinadarai HBF4. Yana da acid mai ƙarfi wanda aka saba amfani dashi azaman mai kara kuzari a cikin halayen sinadarai daban-daban, gami da polymerization da alkylation. Ana samar da acid ta hanyar hada hydrofluoric acid (HF) da boron trifluoride (BF3), kuma ana kiranta da tetrafluoroboric acid. Ruwa ne marar launi ko kodadde mai launin rawaya wanda yake da lalata sosai kuma yana iya zama haɗari don ɗauka.