Calculate Digit Sum

Calculate Digit Sum takes each line you enter and adds up the digits it finds. It updates live as you type and lets you clean out anything that’s not a digit. You can also show the original number next to its digit sum.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total items: 0
Options
Ignore non-digits
Show input with result

How to Use:

  1. Paste or type numbers into the input box, one per line.
  2. Or import a plain-text file using the “Choose File” button.
  3. In Options:
    • Turn on “Ignore non-digits” to strip letters and punctuation.
    • Turn on “Show input with result” to see output like 123 => 6.
  4. The digit sums will appear instantly on the right.
  5. Copy or export your results with the buttons below.

What Calculate Digit Sum can do:

It scans each line, pulls out the digits, and adds them up. You can toggle whether to include or ignore non-digit characters like letters, decimal points, or symbols. There’s also an option to keep the original line alongside the digit sum so you can track what was processed.

Example:

Input:

123
456
9a8b7
3.14

With Options: Ignore non-digits ✓, Show input ✓

Output:

123 => 6
456 => 15
9a8b7 => 24
3.14 => 8

Common Use Cases:

Perfect for math drills, digit-based checksums, or analyzing the structure of numbers. Whether you’re cleaning up input or just curious about digit patterns, this tool makes it fast and easy no formulas required.

Useful Tools & Suggestions:

Breaking numbers into parts? Try Split a Number into Digits to see exactly what you’re working with. And if you’re running patterns across a few values, Sort Digits in a Number can help you line them up for easier comparison.

Related Tools