1 PGy (Petagray) is equal to 999,999,999.9999999 J/mg (Joule per Milligram). To convert from Petagray to Joule per Milligram, multiply by 999,999,999.9999999 or divide by 0.000000001.
Nine Hundred Ninety-Nine Million Nine Hundred Ninety-Nine Thousand Nine Hundred Ninety-Nine Point Nine Nine Nine Nine Nine Nine Nine Joule per Milligram