Enter Number

Calculate the digit sum of 178

Calculate the reduced digit sum of 178

Add up 3 digits of 178:

Digit Sum → 1 + 7 + 8 = 16

Since our digit sum > 9:
repeat this process to get the reduced digit sum:
Our new number to evaluate is 16

Add up 2 digits of 16:

Digit Sum → 1 + 6 = 7

Since our digit sum ≤ 9:
we have our reduced digit sum

Final Answer


Digit Sum = 16
Reduced Digit Sum = 7