How much interest in a month on 50million?

The amount of interest earned in a month on 50 million depends on the interest rate. For example, if the annual interest rate is 5%, the monthly interest would be approximately $208,333.33. To calculate, you would take the principal (50 million) multiplied by the monthly interest rate (annual rate divided by 12). Adjust the calculations based on the specific interest rate you have in mind.