• Contact us

  • Shop 
    • Calculator Software
    • 10-Key Keypad
    • Bundle
  • How To 
    • Learn How
      • See the 10 Key Software in action
      • Learn to 10 Key in 3 minutes
      • What 10 Key speed do you need for a data entry job?
    • How to get better at using a calculator
    • Learn More about 10 Key Software
      • PentaCalc's 10-Key Software
      • Just like a handheld 10 Key
      • Tape Reel for 10 key calculators
    • Learn the 10 Key Calculator and Save Time
  • Calculators 
    • 10-Key Calculator
      • How to use 10 key Software
      • Digital Tape Reel
      • Just like a handheld 10 Key
      • Tax Rate
    • The best handheld calculator
    • Statistics Calculator
      • Regression Analysis
      • Variable Statistics
      • Complex Numbers
    • The 10 key calculator every accountant should own
    • Financial Calculator
      • Time value of money
      • Cash Flow
      • Bond & Depreciation
    • Programming & Scientific Calculator
      • Trigonometric functions
      • Log/Exponent/Hyperbolic
      • Rectangular | Polar
      • Basic Operation
    • Chronicles of the TI calculator and the HP calculator tribal wars
    • Graphing Calculator
      • Create Graphs
      • Cartesian Coordinate
    • The Essential 10-Key Numeric Keypad
    • Units Converter
      • Smart Units
      • Create New Units
  • Blog 
    • The best handheld calculator
    • Why is the telephone keypad opposite the calculator keypad?
    • Is there a difference between an adding machine and a calculator?
    • 10-key calculator versus normal calculator
    • Chronicles of the TI calculator and the HP calculator tribal wars
    • All Blog Posts
      • Read All Articles
  • FAQs 
    • How to customize your calculator
      • Create your own custom calculator
    • 3 keys to being a top-performing auditor
    • Fees & Discounts
      • Corporate/Bulk Discounts
      • Any Annual Fees?
    • Learn the 10 Key Calculator and Save Time
    • How to use a 10 Key
      • How to use 10 key calculator Software
      • How to Use a 10 Key Calculator
    • 10-key calculator versus normal calculator
    • Compatibility
      • OS Compatibility
    • The 10 key calculator every accountant should own
    • Troubleshoot
      • Enter Key that stopped totaling
      • Error Loading Standard Calculator
      • Reload Pentacalc
  • Contact Us 
    • Contact us

A Digital 10-Key Calculator that mirrors real-life
PentaCalc
  • What is a Pentacalc? +-
    • 10 Key
    • Statistics
    • Financial
    • Scientific
    • Programming
    • Graphing
    • Unit Converter
  • Buy Now +-
    • Calculator Software +-
      • 8 in 1 Calculator Software
  • Learning to 10-key
  • 8 in 1 Calculator +-
    • 10-Key Calculator +-
      • Learn how to use a 10-key keypad
      • Digital Tape Reel
      • Tax Rate
      • Auto/Manual Decimal
    • Statistics Calculator +-
      • Regression Analysis
      • Variable Statistics
      • Complex Numbers
    • Finacial Calculator +-
      • Time Value of Money
      • Cash Flow Calculator
      • Bond & Depreciation
    • Scientific Calculator +-
      • Trigonometric Functions
      • Log/Exponent/Hyperbolic
      • Rectangular | Polar
      • Bases
    • Programming Calculator +-
      • Basic Operations
      • Word Size
      • Sign
      • Carry & Overflow Flags
    • Graphing Calculator +-
      • Create Graphs
      • Cartesian Coordinates
      • Line Feed
    • Units Converter +-
      • Smart Units
      • Create New Units
    • Customize a Calculator +-
      • Create Your Own Custom Calculator
      • Auto or Manual Decimal
  • FAQs +-
    • Fees & Discounts +-
      • No Yearly Fees
      • Corporate/Bulk Discounts
    • How To Use +-
      • Learn the basics of how to use a 10-key keypad
      • How to Use 10 Key Mode
    • Compatibility +-
      • Windows Compatible
    • Fix Errors +-
      • Enter Key Stopped Totaling
      • Fix "Error Loading Standard.cal"
      • Reinstalling PentaCalc
  • Blog +-
    • All Posts
    • Recent Blog Posts +-
      • 3 keys to being a top-performing auditor
      • Learn the 10 Key Calculator and Save Time
  • Contact +-
    • Meet the Pentacalc Team
  • Cart ($0.00)
PentaCalc
  • What is a Pentacalc? +-
    • 10 Key
    • Statistics
    • Financial
    • Scientific
    • Programming
    • Graphing
    • Unit Converter
  • Buy Now +-
    • Calculator Software +-
      • 8 in 1 Calculator Software
  • Learning to 10-key
  • 8 in 1 Calculator +-
    • 10-Key Calculator +-
      • Learn how to use a 10-key keypad
      • Digital Tape Reel
      • Tax Rate
      • Auto/Manual Decimal
    • Statistics Calculator +-
      • Regression Analysis
      • Variable Statistics
      • Complex Numbers
    • Finacial Calculator +-
      • Time Value of Money
      • Cash Flow Calculator
      • Bond & Depreciation
    • Scientific Calculator +-
      • Trigonometric Functions
      • Log/Exponent/Hyperbolic
      • Rectangular | Polar
      • Bases
    • Programming Calculator +-
      • Basic Operations
      • Word Size
      • Sign
      • Carry & Overflow Flags
    • Graphing Calculator +-
      • Create Graphs
      • Cartesian Coordinates
      • Line Feed
    • Units Converter +-
      • Smart Units
      • Create New Units
    • Customize a Calculator +-
      • Create Your Own Custom Calculator
      • Auto or Manual Decimal
  • FAQs +-
    • Fees & Discounts +-
      • No Yearly Fees
      • Corporate/Bulk Discounts
    • How To Use +-
      • Learn the basics of how to use a 10-key keypad
      • How to Use 10 Key Mode
    • Compatibility +-
      • Windows Compatible
    • Fix Errors +-
      • Enter Key Stopped Totaling
      • Fix "Error Loading Standard.cal"
      • Reinstalling PentaCalc
  • Blog +-
    • All Posts
    • Recent Blog Posts +-
      • 3 keys to being a top-performing auditor
      • Learn the 10 Key Calculator and Save Time
  • Contact +-
    • Meet the Pentacalc Team
  • Cart ($0.00)
The most recommended 10 Key Software
Digital Calculators

  • 10-Key Calculator
  • Statistics Calculator
  • Financial Calculator
  • Scientific Calculator
  • Programming Calculator
  • Graphing Calculator
  • Units Converter
  • Create a Calculator
What is Pentacalc?

Pentacalc is the most powerful 10 Key software available. With so many innovative features, you never want to go back to hand-helds.

Newsletter

Get blog business and financial articles, updates, and promos.

  • © PentaCalc 2025
  • american express
  • apple pay
  • diners club
  • discover
  • master
  • paypal
  • shopify pay
  • visa