In 1 megaampere second there is 1 megacoulomb.

abcoulomb [abC] ampere hour [A hr] ampere millisecond ampere minute [A min] ampere second [A s] coulomb [C] electrostatic unit of charge [esu] Elementary Charge EMU of charge ESU of charge franklin [Fr] kiloampere hour kiloampere millisecond kiloampere minute kiloampere second kilocoulomb megaampere hour megaampere millisecond megaampere minute megaampere second megacoulomb milliampere hour milliampere millisecond milliampere minute milliampere second millicoulomb statcoulomb [statC]

abcoulomb [abC] ampere hour [A hr] ampere millisecond ampere minute [A min] ampere second [A s] coulomb [C] electrostatic unit of charge [esu] Elementary Charge EMU of charge ESU of charge franklin [Fr] kiloampere hour kiloampere millisecond kiloampere minute kiloampere second kilocoulomb megaampere hour megaampere millisecond megaampere minute megaampere second megacoulomb milliampere hour milliampere millisecond milliampere minute milliampere second millicoulomb statcoulomb [statC]