Calculate the Modulo

Calculate the Modulo helps you compute remainders quickly from expressions like “17 % 5” or “100 % 9.” Just type them in, and the tool handles the rest. It can even explain the math behind each result if you want more than just the answer.

Paste your input above or import a file below.
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Supported file types: .txt, .csv, .log
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Options
Show calculation steps
Trim whitespace
Ignore invalid entries

How to Use:

  1. Paste modulo expressions like a % b (e.g., 23 % 4) into the input box.
  2. Or import a .txt, .csv, or .log file with one expression per line.
  3. Use the toggles to control:
    • Show calculation steps
    • Trim input whitespace
    • Ignore invalid entries
  4. Results update live in the output box.
  5. Copy or export the results when you’re done.
  6. Hit Clear All to reset everything.

What Calculate the Modulo can do:

It evaluates any number of % expressions and gives you the remainder. If you turn on the “Show calculation steps” toggle, it adds a simple explanation like “25 ÷ 4 leaves remainder 1.”

The tool handles empty lines, invalid syntax, and divide-by-zero safely. You can trim whitespace and skip invalid rows with one click. It even counts the number of processed lines live.

It’s built for quick checks and big batches alike.

Example:

Input:

25 % 4
100 % 9
8 % 3
17 % 5

Output:

25 % 4 → 1 (25 ÷ 4 leaves remainder 1)
100 % 9 → 1 (100 ÷ 9 leaves remainder 1)
8 % 3 → 2 (8 ÷ 3 leaves remainder 2)
17 % 5 → 2 (17 ÷ 5 leaves remainder 2)

Common Use Cases:

Use this to validate modulo operations, prep math exercises, debug remainder logic, or bulk-check expressions from files. It’s fast, flexible, and way easier than punching everything into a calculator.

Useful Tools & Suggestions:

Working with remainders? Try Calculate Number Sum if you’re adding up sequences before applying a mod. And when you’re comparing output across values, Calculate the Mode helps spot which results show up the most.

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