Skip to content
Need our W9? Click Here! Tax Exempt Ordering Blog Resellers

For Do-It-Yourselfers, Woodworkers, Hobbyists, and Decorators.

The Home ProjectCalc will help you design, apply, install and finish your home improvement projects with precision and confidence.

Get exactly what you need for your projects with instant calculations for Paint, Wallpaper, Tile, Carpet and Concrete.

Save time and money on material requirements. Reduce calculation errors and make fewer trips to the home improvement store.

Learn more about this product here: Home ProjectCalc Intro and How To Use

It helps you:

  • Calculate material costs
  • Enter measurements just as you say it in feet, inches, fractions, decimal fractions, yards and meters.
  • Convert between all standard math dimensions
  • Works as a standard math calculator with +, -, +/-, ×, ÷, %, π, x2, and √.

Dedicated functions

  • Quickly estimate material amounts and costs for Paint, Wallpaper, Carpet, Concrete and Tile
  • Solve "Reverse" Calculations e.g., How many square feet will five gallons of paint cover?
  • Works directly in feet, inches, fractions, decimal fractions, yards and meters - including square and cubic formats
  • Convert between all standard math dimensions.

Includes

  • One long-life (CR1620) battery
  • Easy-to-follow User's Guide
  • One-year warranty

Tech Specs

  • Size: 2.9 x 4.75 x 0.4" (74 x 121 x 10 mm)
  • Weight: 3.2 oz. (91 g)
  • Power: CR1620 lithium battery (included)
  • Display Type: LCD segment; 11 digits (7 normal, 4 fractions)
  • LCD Display Dimensions: 2.25" x .75" (57 mm x 19 mm)
  • Accuracy: 12 Digit Internal Accuracy

Package Dimensions: 11.25 in x 6.25 in x 1 in

MPN: 8510

UPC: 098584000769

This item is covered by a 1-year limited warranty against defects in materials and workmanship from the date of original consumer purchase in the United States. If a defect exists during the warranty period, Calculated Industries will replace the product at no charge.

To get started, fill out the Return Authorization Request Form on the Calculated Industries website.

Within one business day, Calculated Industries will determine if returning the product can be avoided by having the Technical Support department contact you. If a replacement or repair is determined necessary, they will provide return instructions.

To check on the status of your Repair:
Call Customer Service at 1-775-885-4900 (Hours: 7:00am-4:00pm PST)
Or contact Customer Service via email at custcare@calculated.com.

Let customers speak for us

from 269 reviews
Great company

Have ordered replacement batteries for graphing calculators on two different occasions.Very happy with the price and the shipping fees are reasonable. Each time the delivery was on time or earlier than promised. Great company to do business with.

Lisa T.
Underwood Distributing Co.
High schoolers

My high schoolers needed this calculator aid in homework and it works great.its the same one they use in their class and they are beyond happy with it.

Jennifer I.
Underwood Distributing Co.
ordering was easy--there were absolutely no problems

ordering was easy--there were absolutely no problems...I had a question about
the items ordered and some tax exempt questions, but all questions were
handled quickly and efficiently. I wish all companies were as easy to deal with.

Allen K.
Underwood Distributing Co.
Working with Underwood was a great experience

Working with Underwood was a great experience. My sales rep was responsive, patient and incredible helpful as I explored my options and refined my order. Shipping was also very quick and my products arrived in great shape. This is the second major order I've placed with Underwood and I would not hesitate to order from them again.

Zack S.
Underwood Distributing Co.
I was very impressed and pleased with my experience with Underwood Distribution Company

I was very impressed and pleased with my experience with Underwood Distribution Company. They had the product that I was looking for and at a reasonable price. I found the check out process to be straightforward and easy. As for the shipping, it was exceptional, as my package arrived on time and it was well packed. I am looking forward to conducting future business with Underwood Distribution Company.

Justin B.
Underwood Distributing Co.
Graphing Calculator purchase was wonderful

I am a math teacher in Ogden, Utah. We have ordered from Underwood twice now, buying TI-84 Plus CE graphing calculators both times. They were easy to purchase, a great price compared to others, and arrived quickly. No complaints here! Definitely recommend!

Anonymous
Underwood Distributing Co.
Responsive and quick service!

They answered my phone calls and emails immediately, were super helpful and quick with quotes and orders, and delivered the products within days of placing our order. Everything arrived quickly and perfectly. This was a great experience.

Anonymous
Underwood Distributing Co.
Always prompt with fast shipping!

I have ordered calculators from Underwood Distributing for so many years that I have last track of the time. They are always quick to answer my emails and they get the product I need shipped out asap! 10/10 recommend Underwood!

Amy S.
Underwood Distributing Co.
Fantastic company and product

Fantastic company and product. Stellar to work with year after year.

RE
Underwood Distributing Co.
Wonderful source for TI calculator add ons

The Ti 84 launchpad board and RGB led board are hard to find new for just a single user and definitely not at such a good price. Prompt shipping and everything arrived well packed. Seriously great source if you are looking for small quantity at great value. Thanks!

Mark A.
Underwood Distributing Co.
Calculators for classroom

I teach middle school and wanted reliable calculators, at a good priced, and in a distinct color so everyone knows who they belong to. They were well-packed and arrived quickly! I am so pleased with my purchase and will keep this company in mind for future needs.

Mandee P.
Underwood Distributing Co.
Ti-84 calculator to Ti-84 calculator Data Transfer Cable - THIS IS IT!!!

I have be searching for this cable for over a year! I went to Circuit City, Best Buy and Amazon. NONE of them had this cable. FINALLY I found this cable and I bought in on a desperate hope that it would be the right cable. IT IS!!!! THIS CABLE WORKS FOR CALCULATOR to CALCULATOR DATA TRANSFER!!!

Elizabeth M.
Underwood Distributing Co.
Timeliness and Easy

My current order of graphing calculators was placed and ordered so quickly. Underwood Distributing Company made this process easy and I appreciate the timeliness along with the great price. THANKS!

FORT Z.S.D.
Underwood Distributing Co.
Calculators for classroom

Underwood Distributing was so easy to work with on getting calculators for my classroom! They were so nice and kept me up-to-date with the status of my order. I received my order very quickly, and I am very happy with the purchase.

Christina L.
Underwood Distributing Co.
Ti-84 Calculators

I am very satisfied with the promptness and diligence in which my order was processed. The teachers were able to receive their needed supplies on time.

Pat G.
Underwood Distributing Co.

What customers think about the store

Highly efficient distributor specializing in calculator accessories and replacement parts. Praised for exceptional customer service, fast shipping (often next-day), competitive pricing, and accurate orders. Known for carrying hard-to-find products and specific...

AI-generated from customer reviews.

Delivery Price Service Shipping