Find the Running Product

The Find the Running Product tool multiplies each integer in your input list cumulatively and shows you the result at every step. It’s similar to a running total, but instead of adding, it multiplies perfect for calculating compounding values, factorial-like sequences, or cumulative ratios.

You can paste integers line-by-line, import them from a file, and instantly get the step-by-step product output. It supports negative numbers, lets you ignore invalid input, and optionally starts the product from 1 (useful for clarity or control).

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 valid lines: 0
Options
Ignore non-integers
Start from 1 (include initial product)
Maximize output

How to Use:

  • Paste integers (one per line) into the Input Integers box
  • Or use Choose File to import from a .txt, .csv, or other supported format
  • Toggle Ignore non-integers to skip or retain invalid lines
  • Enable Start from 1 to begin the product at 1 (instead of using the first number as-is)
  • Use Maximize output to expand the result area for easier reading
  • Click Calculate to run the tool (updates automatically as you type)
  • Use Copy Output or Export to File to save results
  • Click Clear All to reset everything and start fresh

What Find the Running Product can do:

This tool multiplies numbers line by line and shows each intermediate result. You can track cumulative growth, validate stepwise multiplication, or test how input changes affect totals. It handles large lists efficiently and supports both positive and negative integers.

Example:

Input:

2
3
4

Output (Start from 1 OFF):

2
6
24

Output (Start from 1 ON):

2
6
24

Common Use Cases:

Use this tool for calculating compound growth, factorial variants, chain multipliers, or validating manual work. It’s great for developers testing logic, students learning math, or analysts modeling sequences. Fast, flexible, and offline-friendly.

Useful Tools & Suggestions:

Once you’ve used Find the Running Product, try Find the Running Total to see how additive patterns compare to multiplicative ones. Or give Multiply Integers a go if you want to apply a straight product across all values at once instead of step-by-step.

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