Sample C# code to shorten amount from 1 Trillion to 1T, 1 Billion to 1 B, 1 Million to 1M and 1 Thousand to 1K.

The following code can be used to shorten a amount from 1 Trillion to 1T, 1 Billion to 1 B, 1 Million to 1M and 1 Thousand to 1K. You can customize it to accept more number of scales amount like Quadrillion, Quintillion, Sextillion, Septillion etc.

public static string GetFormattedAmountText(double amount)
{
 var formattedAmount = string.Empty;
 
 var x = amount;  //the number to be evaluated
 var e = 0;    //to accumulate the scale
 var i = x;    //a working variable
 
 while (i > 1)
 {
  i = i / 10;
  e++;
 }
 
 if (e >= 12)
 {
  formattedAmount = x / 1E9 + "T";
 }
 else if (e >= 9)
 {
  formattedAmount = x / 1E9 + "B";
 }
 else if (e >= 6)
 {
  formattedAmount = x / 1E6 + "M";
 }
 else if (e >= 3)
 {
  formattedAmount = x / 1E3 + "K";
 }
 
 return formattedAmount;
}