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Updated September 2026: current prices re-verified at Staples; SAT, ACT, and AP calculator rules re-checked against the College Board’s and ACT’s own current pages.
The TI-84 Plus CE is still the best graphing calculator for most U.S. students, because it’s the machine classrooms teach on and every major exam permits — but the case for it just got a little more expensive to make. At current Staples pricing, the TI-Nspire CX II (non-CAS), the “power option” in this lineup, costs $129.49 against the TI-84’s $139.99 — it’s now the cheaper calculator, not the pricier one. The Casio fx-9750GIII remains the budget pick at $75.99, and the fx-CG50 is the color-screen value at $109.99, though both have climbed since the prices this category is usually quoted at.
What the SAT and ACT Actually Require
| Claim | What we checked | Verdict |
|---|---|---|
| These four calculators are on the SAT’s “approved” list | College Board’s own current calculator policy page states it “no longer maintains a comprehensive approved list,” and instead publishes a list of prohibited features — chiefly CAS functionality. | There’s no approved list to be on anymore. All four qualify because none trips the prohibited-features list, not because College Board named them. |
| You need a handheld calculator for the SAT | College Board’s own policy page: “Calculators are not required” on the digital SAT — the Bluebook app’s built-in Desmos tool is available on every math question. | True. The SAT itself needs no handheld at all; the ACT and AP exams still expect one. |
| The TI-84 Plus CE is the cheaper machine and the Nspire CX II is the pricier step-up | Current Staples pricing: TI-84 Plus CE $139.99, TI-Nspire CX II (non-CAS) $129.49. | Reversed. The “step-up” Nspire is currently the cheaper of the two. |
| Casio undercuts TI by roughly a third | fx-9750GIII is $75.99 against the TI-84’s $139.99 — 54% of the price, not a third. The fx-CG50 is $109.99, 79% of the TI-84’s price. | Casio is still cheaper, but the gap has narrowed since these prices last got checked. |
The Ledger, Weighted Toward What Lasts Four Years
Weighted toward the two things that actually decide which calculator survives four years of homework: cost per school year and classroom ecosystem fit. Disagree with a weight? Re-run it — every input is sourced below.
| Axis (points) | TI-84 Plus CE | TI-Nspire CX II | Casio fx-CG50 | Casio fx-9750GIII |
|---|---|---|---|---|
| Cost per school year (30) | 17 | 19 | 22 | 30 |
| Classroom ecosystem fit (20) | 20 | 10 | 4 | 4 |
| Display quality (15) | 10 | 15 | 13 | 2 |
| Computing power (15) | 7 | 15 | 10 | 4 |
| Battery convenience (10) | 10 | 10 | 5 | 5 |
| Ease of use (10) | 10 | 2 | 5 | 8 |
| Tally | 74 | 71 | 59 | 53 |
Classroom ecosystem fit is worth 20 points on its own because it’s the axis that actually predicts whether a student gets unstuck at homework time — a teacher’s worked example, a textbook’s keystrokes, and a late-night YouTube tutorial all assume a TI-84 far more often than any rival here. That’s also the axis keeping the TI-84 ahead of the Nspire despite losing on price, display, and power.
The Tie-Breaker
Three points on a 100-point scale built from estimated street prices is inside rounding error — this is close enough to call. If it were Nate’s kid and Nate’s money, the TI-84 Plus CE still wins, for a reason the Ledger can’t fully price in: when a stuck kid searches their exact homework problem at 10 p.m., the answer that comes back online matches a TI-84’s buttons far more often than a Nspire’s. That’s not a spec. It’s still worth the extra $10 a year.
What Each Calculator Actually Costs Per School Year
A graphing calculator is one of the few school purchases built to last all four years of high school — the platforms are deliberately frozen so teachers and test-makers can rely on them. That makes cost per school year the honest comparison. Battery costs for the two AAA-powered Casios are our own estimate — roughly two sets of four AAAs over four years of typical school use — stated as an estimate because neither maker publishes a battery-replacement schedule.
| TI-84 Plus CE | TI-Nspire CX II | Casio fx-CG50 | Casio fx-9750GIII | |
|---|---|---|---|---|
| Price (Staples) | $139.99 | $129.49 | $109.99 | $75.99 |
| 4-year battery cost | $0 (rechargeable) | $0 (rechargeable) | ~$10 (AAAs, our estimate) | ~$10 (AAAs, our estimate) |
| Cost per school year | $35.00 | $32.37 | $30.00 | $21.50 |
Prices are approximate, current as of publication, and change frequently — confirm the latest price with the retailer before buying.
The real-money spread between cheapest and priciest here is about $14 a school year — noticeable, but nowhere near what the sticker prices imply. A well-kept TI-84 also tends to hold resale value unusually well, since next year’s students need the identical model; that’s not in the table above, but it’s worth knowing before writing off the higher year-one cost.
TI-84 Plus CE: still the classroom default
The TI-84 Plus CE wins on an axis that has nothing to do with its own hardware: American math education is built around it. Teachers demonstrate on it, textbooks print its keystrokes, and the answer a stuck student finds online at 10 p.m. will match the buttons in their hand. The current editions add a rechargeable body, a color screen, and Python programming on top of that ecosystem advantage.
Skip this if the classroom is calculator-agnostic and either the budget is tight or the extra computing power matters more than familiarity — the Casio and the Nspire both have a real case now.
TI-Nspire CX II: the power option, now the cheaper one
The Nspire CX II is the most capable machine here — the sharpest screen, a document-based interface closer to a small computer, and enough headroom to carry a student through pre-calculus, AP Calculus, statistics, and into college coursework without feeling outgrown. At $129.49, it’s no longer the expensive upgrade the sticker price used to suggest; it now undercuts the TI-84 outright.
Buy only the non-CAS version if any exam is in the picture — the ACT’s own calculator policy prohibits CAS functionality outright and separately names the non-CAS Nspire as permitted. The College Board’s AP calculator list is set per subject, so confirm your student’s specific AP course before test season rather than assuming.
Skip this if your student needs their menus to match a TI-84-centric classroom, or gets frustrated by a steeper learning curve — that friction matters more day to day than any spec.
Casio fx-CG50: the color screen for less
Casio’s fx-CG50 makes the simplest hardware argument here: a large, bright color display, 3D graphing the TI-84 line lacks, and built-in Python, all for $30 less than the TI-84 at current prices. For a visual learner, three functions plotted in three colors on a crisp screen is a genuine advantage, not a luxury — and it’s approved for the SAT, ACT, and AP tests per Casio’s own product page.
Skip this if classroom conformity matters more than screen quality — a Casio in a TI-84 classroom means translating keystrokes on your own, and fewer tutorials exist when homework gets hard.
Casio fx-9750GIII: the budget pick, pricier than it used to be
The fx-9750GIII is still the value story of this lineup — full graphing capability, Python programming, and SAT/ACT/AP eligibility, all for $75.99. That’s meaningfully more than the roughly $55 this model has historically sold for, but it’s still the cheapest calculator here by a wide margin, and at $21.50 a school year it’s barely more than a nice backpack.
Skip this if your student responds well to color graphing or is likely to get frustrated by a monochrome screen next to classmates’ color ones — that frustration is a real cost the price tag doesn’t show.
Email the math department before buying anything — their answer outweighs everything above, ours included. If the classroom runs on TI, the TI-84 Plus CE is still the right call and the used market softens its price. If the room is calculator-agnostic and your student is strong in math, the TI-Nspire CX II is now the better deal as well as the more capable machine. The Casio fx-9750GIII covers the full exam slate for the least money, and the fx-CG50 is the sweet spot for a color display without the TI premium. Setting up the rest of the back-to-school electronics list? Our home printer comparison covers the other big-ticket question, and more comparisons live in Tech & Electronics. We also checked Texas Instruments’ record on the Consumer Product Safety Commission’s manufacturer page before writing any of this — no recall touches a current graphing calculator from either maker.
