10-Key Calculator: The #1 Free Professional Adding Machine
The most powerful 10-key calculator used by accountants, bookkeepers, cashiers, and financial professionals worldwide. This 10-key calculator features a digital tape, memory bank, grand total (GT), tax functions, and print/export — just like a real adding machine.
How the 10-Key Calculator Works
Our 10-key calculator simulates a physical adding machine with:
- Tape: Records every entry with timestamp
- Memory: M+, M−, MR, MC
- Grand Total (GT): Running total across all entries
- Tax Functions: +TAX, −TAX (configurable)
- Print & Export: PDF tape or CSV for Excel
Professional 10-Key Calculator Features
- Full 10-key layout (0–9, +, −, ×, ÷, =)
- Digital tape with auto-scroll and timestamps
- Memory bank with M+, M−, MR, MC
- Grand Total (GT) for batch processing
- Percent, backspace, CE/C
- Print-ready tape or export to CSV
- Keyboard numpad support
10-Key Calculator for Accountants
Use this 10-key calculator for reconciliations, invoicing, payroll, and audits. The GT function tracks running totals across hundreds of entries with zero errors.
10-Key Calculator for Cashiers & Retail
Fast addition/subtraction with tape. Perfect for daily cash-ups, register balancing, and end-of-day reports.
10-Key Calculator for Bookkeepers
Track expenses, income, and totals with memory and GT. Export to CSV for QuickBooks or Excel in seconds.
10-Key Calculator Training & Certification
Practice touch-typing numbers without looking. Build muscle memory for 10-key certification tests (AICPA, NNA, etc.).
Why This 10-Key Calculator Is the Global Standard
- Realistic adding machine simulation (Canon, Sharp, Casio)
- Print-ready tape with date/time
- Memory and GT functions
- Works on desktop, tablet, mobile
- No ads, no tracking, 100% private
- Supports global number formats
How to Use 10-Key Calculator Like a Pro
- Enter numbers using keypad or keyboard numpad
- Press + or − after each item
- Use GT for running total
- Print tape at end of session
- Export CSV for Excel/Sheets
10-Key Calculator Keyboard Shortcuts
Use your keyboard’s numpad:
- 0–9, +, −, *, /, Enter (=)
- Backspace (Backspace), Delete (C)
- Esc (CE)
Frequently Asked Questions (FAQ)
Is this 10-key calculator free?
Yes, 100% free. No sign-up, no ads, no install.
Can I print the tape?
Yes, click "Print Tape" for a PDF-ready output with date/time.
Does it work on mobile?
Yes, fully responsive. Use touch or connect a keyboard.