
Calculated Industries 4225 Concrete Calculator
180 checks since Jul 24 · $82.43–$115.66
Price as of Oct 31, 2026, 4:48 a.m. EDT. Prices and availability change.
COLOR DISPLAY & 3D GRAPHING – Large, high-resolution backlit LCD with over 65,000 colors allows for clear visualizations and supports 3D graphing of up to three functions, including spheres, cylinders, and planes. Enhanced contrast and flush-gloss panel improve visibility during data analysis and graph transformations. ADVANCED MATH FUNCTIONS & INTERFACE – Perform complex number calculations, polar and rectilinear graphing, simultaneous equations, dynamic graphing, matrix/vector operations, geometry, statistics, and more. Tab-based menu layout and glyph-based key labeling offer intuitive navigation and faster input. EXAM-APPROVED WITH MODE-SWITCHING – Features built-in Exam Mode accessible from the home screen and is approved for use on AP, SAT, PSAT, and ACT exams, making it a secure and versatile tool for standardized testing and classroom use.
At the October 31 check, the price was $164.99, against a recorded range of $139.99 to $169.99 across 167 checks since July 24.
It has held that level for 36 days.
$25.00 above lowest · Checked 2026-10-31
Not buying today? Get one email if this price drops.
Price as of Oct 31, 2026, 2:18 a.m. EDT. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.ca at the time of purchase will apply to the purchase of this product. As an Amazon Associate I earn from qualifying purchases.Prices and availability change.
This is Dipp's observed history, not every price ever offered on Amazon.ca.
The latest observations Dipp has stored for this product. These are periodic checks, not a record of every price Amazon displayed.
| Checked | Price |
|---|---|
| Oct 31, 2026, 2:18 a.m. | $164.99 |
| Oct 30, 2026, 12:48 p.m. | $164.99 |
| Oct 30, 2026, 12:47 a.m. | $164.99 |
| Oct 29, 2026, 10:48 a.m. | $164.99 |
| Oct 28, 2026, 9:47 p.m. | $164.99 |
| Oct 28, 2026, 6:47 a.m. | $164.99 |
| Oct 27, 2026, 5:48 p.m. | $164.99 |
| Oct 27, 2026, 4:47 a.m. | $164.99 |
| Oct 26, 2026, 2:48 p.m. | $164.99 |
| Oct 26, 2026, 2:19 a.m. | $164.99 |
| Oct 25, 2026, 1:47 p.m. | $164.99 |
| Oct 25, 2026, 12:48 a.m. | $164.99 |
Nearest prices in this category, so today’s number has something to sit against.

180 checks since Jul 24 · $82.43–$115.66
Price as of Oct 31, 2026, 4:48 a.m. EDT. Prices and availability change.

201 checks since Jul 24 · $17.60–$42.99
Price as of Oct 31, 2026, 6:47 a.m. EDT. Prices and availability change.

108 checks since Aug 20 · $37.75–$84.98
Price as of Oct 31, 2026, 1:47 a.m. EDT. Prices and availability change.

159 checks since Jul 24 · $19.99–$31.99
Price as of Oct 31, 2026, 2:19 a.m. EDT. Prices and availability change.

174 checks since Jul 24 · $19.99–$35.99
Price as of Oct 31, 2026, 3:47 a.m. EDT. Prices and availability change.

171 checks since Jul 25 · $263.99–$329.99
Price as of Oct 31, 2026, 4:47 a.m. EDT. Prices and availability change.
The wider Office catalogue on Amazon.ca, each product with its own recorded price history.