Digital Root
MATHEMATICS
Digital Root
Reduce a nonnegative decimal integer to its digital root.
UNDERSTAND YOUR RESULT
How it works
Reduce a nonnegative decimal integer to its digital root.
THE CALCULATIONrepeatedly sum digits to reach one digit
Using this calculator
Enter nonnegative decimal integer. repeatedly sum digits to reach one digit.
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.