Enter Number

Calculate the digit sum of 253

Calculate the reduced digit sum of 253

Add up 3 digits of 253:

Digit Sum → 2 + 5 + 3 = 10

Since our digit sum > 9:
repeat this process to get the reduced digit sum:
Our new number to evaluate is 10

Add up 2 digits of 10:

Digit Sum → 1 + 0 = 1

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

Final Answer


Digit Sum = 10
Reduced Digit Sum = 1