Digit Sum Calculator

Use this Digit Sum Calculator to Find the Sum of Digits of a Number.

Sum of Digits

What is a Digit Sum Calculator?

A digit sum calculator is an online mathematical tool that takes a number as input and calculate the sum of its digits.

For example, if the user enters 252462, then it's digit sum will be 2 + 5 + 2 + 4 + 6 + 2 = 21.

Digital Root Sum

A digital root sum also known as reduced digit sum is the single digit value you will get by repeatedly adding the digits of a number until the sum is less than 10. For example, 942 will be reduced to 6.

Calculate Sum of Digits

Quickly find the sum of digits of the input number.

Compute Digital Root

Efficiently calculate the reduced digit sum.

Display Calculation

See the step by step calculation for clarity.

Digit Sum

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25 = 2 + 5 = 7

42 = 4 + 2 = 6

13 = 1 + 3 = 4

234 = 2 + 3 + 4 = 9

125 = 1 + 2 + 5 = 8

235 = 2 + 3 + 5 = 10

145 = 1 + 4 + 5 = 10

245 = 2 + 4 + 5 = 11

345 = 3 + 4 + 5 = 12

124 = 1 + 2 + 4 = 7

1271 = 1 + 2 + 7 + 1 = 11

243 = 2 + 4 + 3 = 9

How to Calculate the Sum of Digits?

1

Enter Number

Enter the number whose digit sum you want to find. For example, if you want to find the sum of 256478, then you have to enter 256478 in the input field.

This calculator will compute both sum of digits, and digital root sum of the entered number.

2

Calculate Digit Sum and Reduced Sum

After entering the number, the next step is to click on the 'Calculate' button. After clicking on calculate button, this calculator will calculate and display the following results:

Sum of Digits
Reduced Digit Sum
Expression