The Windows Adding Machine with running tape.
Business managers, accountants and number crunchers love DeskCalc — modern interface, paper-tape workflow, and one calculator that follows you from the office to the home office to the client site.
6 MB · Windows 10/11 · Server 2008–2025 · 7/8.1 · No credit card
5 Million+ users have tried DeskCalc — from solo accountants to whole government teams.
Built for bookkeeping, tax practice and the back office
Four things the machine on your desk can't do.
Click & Calc
Numbers from any windowSelect figures anywhere on screen — a PDF, a scanned invoice, your accounting app — and they land in the tape. No retyping, no import step.
See it in action
Check strip
Audit-grade tapeA full adding tape with text labels and inline corrections — change, add or delete a value and every total recalculates. Export to PDF, Excel or Word.
Inside your accounting app
Call it, calculate, hand backLaunch DeskCalc straight from your accounting software, calculate, and the result goes back into the field you came from.
Save the tape
Keep the working paperSave a tape with its labels and reopen it later. When a client asks how a figure came about, the answer is a file — not an evening.
Switch to a software calculator?
It's not just about the functions; it's about how it changes the way you calculate — and the time you get back at the end of the day.
DeskCalc vs. traditional desktop calculatorsEditable tape
Made a mistake? Don't restart. Edit any previous entry on the tape and watch all totals recalculate instantly.
Data exchange
Copy tape values directly into Excel, Word, or PDF documents. No more double-typing from a physical machine.
Tax & currency
Built-in professional tax functions and real-time currency converters for international business needs.
Work anywhere
Log in from your laptop or desktop with the same license. Your settings and tape history follow you everywhere.
See DeskCalc at work
The workflow most people come for — then screenshots below.
Attach your tape to the document
The digital version of the paper strip you used to staple to the paperwork — so anyone can see how the total came about.
Watch all 6 workflows
Number-crunchers everywhere
"Your product is superb. There is nothing else out there for computers like it. I have used it for years and recommended it to many associates. Continued development and support is excellent."
"Great product. I just unplugged my Victor 1280 calculator after 30 years."
"This is the ONLY adding machine tape program that works like a real 10-key. The price is reasonable considering what I get out of it daily in my accounting practice."
- Lifetime free version
- Works offline
- No data tracking
- Free updates included
Ready to modernize your calculation?
Join millions of professionals who have replaced their mechanical machines with the precision and power of DeskCalc.
Free Download6 MB · Windows 10/11 · Server 2008–2025 · 7/8.1 · No credit card