1 ch (chain) is equal to 20,116,799,999,999.883 pm (picometer). To convert from chain to picometer, multiply by 20,116,799,999,999.887 or divide by 0.000000000000049709695378987.
Twenty Trillion One Hundred Sixteen Billion Seven Hundred Ninety-Nine Million Nine Hundred Ninety-Nine Thousand Nine Hundred Ninety-Nine Point Eight Eight Three Picometer