There is no single figure. All RHA -equivalent figures given against APFSDS / HEAT projectiles are just generic values, valid for "generic" average HEAT or APFSDS. But every APFSDS or HEAT have its own unique penetration characteristic, and both armor and projectiles designers try to improve its product specifically against
modern threat / armor.
So, for example, modern ATGM may have almost same RHA penetration as 20-years old ATGM, but penetrate composite or ERA armor much better. Same with APFSDS.
Or big ATGM's (Hellfire, Maverick) have almost same RHA penetration as smaller TOW-2 class ATGM's, but behave much better against ERA or composite armor due to much large penetrator diameter and mass.
For Pakistan scrambling a few years back for Tow 2B purchases says alot for that missiles performance, I think that you will find that most Western heavy ATGMs are designed for either top attack or ERA penetration performance.