Digit Sum
MATHEMATICS
Digit Sum
Sum the digits of a nonnegative integer.
UNDERSTAND YOUR RESULT
How it works
Sum the digits of a nonnegative integer.
THE CALCULATIONadd the decimal digits
Using this calculator
Enter nonnegative decimal integer. add the decimal digits.
What to keep in mind
Finite real numbers unless a complex or exact-integer result is specified. Outputs are rounded for display. Matrix calculations use floating-point arithmetic.
Frequently asked questions
Are my entries saved?
No. Calculator inputs remain in the current page and are cleared when you reload or leave. The tools do not upload your entries.
Why are results rounded?
The display is rounded for readability. Calculations use unrounded intermediate values. An estimate should not be interpreted as an exact measurement.