The classic way to convey the error that exists in a measurement is a formula that shows the obtained measurement (X) as a sum of a true score plus some error. One version of this formula is: X = T + e. With this formula in mind, obtaining more precise measures depends on reducing error.
  Mega is the prefix meaning one million, therefore there are one million (1,000,000) gallons in a mega gallon.
How many milliliters in a gallon? Fluid and dry gallons to milliliters volume units conversion factors are listed below. To find out how many milliliters in gallons, multiply by the factor or use the converter below. 1 Gallon [Fluid, US] = 3785.41178 Milliliters. 1 Gallon [UK] = 4547 Milliliters.