Adding Machine Calculator
A running-tape adder like a classic 10-key adding machine: enter a list of amounts (negatives subtract) and see the running total after every entry.
Inputs explained
- Entries (comma-separated; use negatives to subtract) — Amounts separated by commas, e.g. 12.50, 3.75, -8.25, 20.
How to use it
- Fill in the fields above — each input has a hint describing exactly what to enter
- Press Calculate to get your result instantly, right on this page
- Copy the result, save the tool to favorites, or share and embed it anywhere
Understanding the result
Example: For 12.50, 3.75, −8.25, 20 the running totals are 12.5, 16.25, 8, and finally 28.
Frequently asked questions
How do I subtract an amount instead of adding it? Enter that entry as a negative number (e.g. −8.25); the running tape treats a negative value as a subtraction from the current total.
Does the order of the entries change the final total? No, the final total is the same regardless of entry order, but the running subtotal shown after each line will differ depending on the sequence you type them in.
Is the Adding Machine Calculator free to use? Yes — it is completely free, with no sign-up, no download and no usage limits. You can use it as often as you need.
Is my data private? Yes. The calculation runs entirely in your browser — the values you enter are never sent to our servers, stored or shared with anyone.
What information do I need? Just the following: Entries (comma-separated; use negatives to subtract). Each field includes a hint explaining exactly what to enter.
Can I use it on my phone? Yes — the tool is fully responsive and works on any device, and the same calculator is available in the EasyWorkCalcs mobile app.
Privacy
Everything you enter into the Adding Machine Calculator is processed entirely in your browser. Nothing is uploaded, stored or shared — your data stays on your device.