Calculate a Running Difference
Calculate a cumulative difference of a list of numbers. Runs entirely in your browser, so your data never leaves your device.
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Output
The result appears here as you type.
How to use Calculate a Running Difference
- 1. Paste your list of numbers. Enter the numbers in the order you want them subtracted, separated by commas or line breaks. The first value stays as-is and each following value is subtracted from the running total.
- 2. Set the separator. Choose the Separator that joins the output values, such as a comma or a newline, so the running difference matches the format your spreadsheet or script expects.
- 3. Copy the running difference. Copy the sequence of cumulative differences from the output. Each position shows the total after subtracting every prior value up to that point.
When to use Calculate a Running Difference
Calculate a Running Difference subtracts each number in a list from a running total, one step at a time, and shows the value after every subtraction. It fits anyone tracking a balance as deductions come in.
- Tracking a shrinking budget. You start with a fixed project budget and a list of expenses in the order they were spent, and want to see the remaining balance after each individual expense rather than only the final total.
- Modeling inventory depletion. A warehouse log lists units shipped out each day from a starting stock count, and you want the stock level after every shipment without building a spreadsheet formula.
- Checking a countdown sequence. A game or simulation subtracts damage values from a starting health total in sequence, and you want to verify the health after each hit matches what the game logic reports.
- Reviewing a bank statement by hand. A paper statement lists withdrawals but not the running balance, so you paste the starting balance and each withdrawal to reconstruct the balance after every transaction.
Examples
Running difference of integers
Input
100, 20, 30, 5
Output
100, 80, 50, 45
Subtracting negatives adds them back
Input
10 -5 3
Output
10, 15, 12
About the Calculate a Running Difference tool
Calculate a Running Difference does its work locally, right in the browser. Calculate a cumulative difference of a list of numbers. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the Number Tools collection on EditSafely, a set of 194 small, focused Number utilities that share the same instant, private workspace.
You can shape the output with the Separator setting, and the result refreshes the moment you change it. 2 worked examples further down the page show exactly what the tool produces for real inputs.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Is Calculate a Running Difference free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.
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