Education Technology

TI-73 Explorer™ graphing calculator

Designed specifically for middle-grade mathematics and science, the TI-73 Explorer™ graphing calculator is the ideal teaching and learning tool to help students build proficiency and confidence.

Where to Buy**
TI-73 Explorer

Encourage exploration. Enliven understanding.

Enhance your students’ learning experience with the TI-73 Explorer™, which serves as a bridge between the TI-15 Explorer™ and the TI-84 Plus family. Designed for middle-grade math and science, this graphing calculator encourages fraction exploration and supports interactive learning and data collection.

  • Fraction capability includes step-by-step simplification and operations, including conversions between fractions, mixed numbers and decimals
  • Qualitative data functionality enables students to explore qualitative data with up to seven (7) values using bar graphs, pictographs and pie charts
  • Preloaded data collection interfaces support sensors for measuring light, voltage, temperature and sound
  • Free, collaborative forum offers thousands of free activities that can be browsed by subject, grade level and standards support


Take it to the test

Standardized testing organizations have approved the TI-73 Explorer™ calculator for use on the PSAT®, SAT® and AP® tests.

A complete learning resource

Classroom activities

Browse and download free, standards-aligned activities designed for the complete line of Texas Instruments (TI) graphing calculators.

Professional development

Workshops and coaching delivered by experienced, certified T³™ instructors to help you meet your classroom goals. For more than 25 years, the T³™ organization has been providing professional development that combines content-rich curriculum, hands-on technology training and compelling instruction on best teaching practices.

SAT® and AP® are trademarks registered by the College Board. PSAT® is a registered trademark of the College Board and the National Merit Scholarship Corporation. Neither are affiliated with, nor endorse, TI products. Policies subject to change. Visit

**Not available at retail.


TI-73 Explorer™ graphing calculator specifications

System Requirements Icon

Built-in functionality

  • Stacked fractions
  • Seven statistical plots: pictographs, pie charts, bar charts and more
  • Scrollable home screen
  • Four constant features
  • English and metric conversions
  • Compatible with the CBL™ 2 data collection device and CBR™ motion sensor systems to allow collection and analysis of real-world data
  • Applications available from TI, Sunburst Software and others
  • More advanced functions accessed through pull-down menus
  • Fourteen-digit accuracy displayed to 10 digits with two-digit exponent
  • Graphs four functions simultaneously
  • Send and receive lists and variables to and from the TI-82, TI-83, TI-83 Plus, and TI-84 Plus graphing calculators
  • Up to seven graph styles: thin, thick, animate, animate with path and more
  • User-defined list names; stores up to 999 elements
  • Thirteen zoom features
  • Function evaluation table.
  • List-based one- and two-variable statistics including linear, quadratic, exponential, med-median and manual-fit regression models
  • Three statistical plot setups
  • Interactive equation solver
  • Alphabetical CATALOG of all calculator operations in one menu
  • Programming capabilities.
  • Display indicates when fraction can be simplified
  • Shows common factor used during simplification
  • Enter your own factor during simplification
  • Change improper fractions to mixed numbers
  • Simplifies fractions
  • Fraction/decimal conversions
  • Combinations and permutations
  • Random number generator
  • Trigonometry
  • Logs and antilogs
  • Convert angles from degrees to radians
  •  %, x², 1/x, x, y², xy, and x!
  • Fixed decimal capability
  • AOS: × and ÷ before + and -


  • Large 64 × 96 pixel screen
  • Eight-line × 16-character, easier-to-read LCD display
  • I/O port for linking and data collection
  • 32 KB RAM with 25 K user-available; 128 K of application space (with OS v. 1.60)
  • TI-GRAPH LINK™ software accessory allows information to be transferred to a computer and printed or stored on disk
  • Powered by four (4) AAA batteries with lithium battery backup
  • Impact-resistant slide case
  • Built extra-durable for middle school use


  • Included apps: Area Formulas, Geoboard, and Number Line
  • Apps are available from TI and other leading developers


  • Supports TI-Basic programming
  • Programming capability with the number of programs limited only by available memory
  • App SDK available


  • One-year limited warranty
  • Toll-free help hotline: 1.800.TI.CARES
  • Email:
  • Classroom activities available
  • Workshop Loan Program: Borrow TI calculators for evaluation or workshops
  • TI Technology Rewards program: Point values redeemable for additional TI products and services
  • Complete guidebook available

**Not available at retail.


TI-73 Explorer™ graphing calculator applications

Customize your learning with graphing calculator applications. The addition of applications extends the functionality of your calculator, allowing you to perform specific math and science functions and deepen your understanding of concepts. 

Mathematics, science, engineering and utility applications for the TI-73 Explorer™ graphing calculator.

Download applications

The following applications are available for this product:

  • Area Formulas App for TI-73 Explorer™
  • Building Perspectives™ App for the TI-73 Explorer™
  • Explorer Draw App for TI-73 Explorer™ (Concept)
  • Geoboard App for the TI-73 Explorer™
  • Guess My Coefficients App for TI-73 Explorer™
  • Logic Ladder App for the TI-73 Explorer™
  • Math by Hand App for the TI-73 Explorer™ (Concept)
  • Matrices App for the TI-73 Explorer™
  • Number Curiosities App for the TI-73 Explorer™
  • Number Line App for the TI-73 Explorer™
  • Probability Simulation App for the TI-73 Explorer™
  • Puzzle Tanks™ App for the TI-73 Explorer™
  • Rational Number Rampage App for the TI-73 Explorer™
  • Safari Search™ App for the TI-73 Explorer™
  • SimCalc MathWorlds™ App for the TI-73 Explorer™
  • SMILE app for the TI-73 Explorer™
  • StudyCards™ App for the TI-73 Explorer™
  • Topics in Algebra 1 (Chapters 1–5) App for TI-73 Explorer™

The following applications are preloaded on this product:

  • Area Formulas App for TI-73 Explorer™
  • Geoboard App for the TI-73 Explorer™
  • Number Line App for the TI-73 Explorer™

SimCalc MathWorlds is the property of its owner.

**Not available at retail.


Accessories for the TI-73 Explorer™ graphing calculator

Extend the power of your graphing calculator and create a customizable approach to learning with accessories for your graphing calculator.

CBL™ 2 data collection device

The CBL™ 2 device is a portable, handheld, battery-operated data-collection device for gathering real-world data. Data collected with a CBL™ 2 device can be retrieved and analyzed by TI graphing calculators. With the CBL™ 2 device and appropriate sensors, you can measure motion, temperature, light, sound, pH, force and much more.

CBR™ 2 motion sensor

The CBR™ 2 system, which connects directly to your graphing calculator, is designed for teachers who want their students to collect and analyze real-world motion data such as distance, velocity and acceleration.

TI Connect Screen Shots

TI Connect™ CE software application

TI Connect™ CE software allows for connectivity between your computer and graphing calculator. Transfer data, update your operating system (OS), download Calculator Software Applications (apps), edit and load programs to your graphing calculator.

Free Download for PC
Free Download for Mac®

Mac is a trademark of Apple Inc., registered in the U.S. and other countries.

**Not available at retail.


Resources for the TI-73 Explorer™ graphing calculator

Download Guidebook


Download the latest product manuals to get the most from your TI-73 Explorer™ graphing calculator.

TI-73 Explorer™ Guide for Teachers

TI-73 Explorer™ guidebook

CD Disk

Operating system

Keep your graphing calculator up to date with the latest operating system.

TI-73 Explorer™ operating system

**Not available at retail.