Yes, calculators are allowed on the SAT Math sections, but only approved types; the Reading and Writing section doesn’t use them.
When you’re getting ready for the SAT, a calculator question pops up fast: do you bring one, and will it pass the rules at the door? Math allows calculators, and the device needs to meet clear limits.
This article lays out what you can use in each section, what features get blocked, and how to prep your calculator so you can walk in, sit down, and get straight to work. No guesswork when you arrive.
SAT Calculator Rules At A Glance
| Rule Area | Allowed | Not Allowed |
|---|---|---|
| Math Modules | Calculator access for all Math questions. | Assuming there’s still a Math module with no calculator access. |
| Reading And Writing | Calculator stays put away during these modules. | Using a calculator for timing, checking grammar counts, or side math. |
| Bluebook Tools | Embedded Desmos calculator with scientific and graphing modes. | Relying on Desmos without trying it during practice. |
| Handheld Types | Non-CAS graphing, scientific, or basic four-function calculators. | Any handheld calculator with CAS functionality. |
| Connectivity | Battery-powered handheld calculators with no wireless features. | Devices with cellular, Bluetooth, or internet capability. |
| Programs And Files | Cleared stored documents and removed algebra programs. | Saved notes, documents, or algebra programs left on the device. |
| Sharing | Each student uses their own calculator. | Passing a calculator back and forth. |
| Sound And Cases | Sound off; calculator case stays under the desk. | Beeping, alarms, or a case left on the desk. |
| Ports And Power | Infrared ports taped over; batteries only. | Power cords for calculators or untaped infrared ports. |
| Consequences | Follow rules and keep testing smoothly. | Sharing info, copying questions, or using banned devices can end testing and cancel scores. |
Are Calculators Allowed On The SAT?
Yes. If you’re asking, “are calculators allowed on the sat?” the answer is yes for Math and no for Reading and Writing. On the digital SAT, calculators are available across the entire Math portion. You can use the built-in Desmos calculator in Bluebook, bring an approved handheld calculator, or mix both.
During Reading and Writing, calculators are not part of the allowed tools. Put yours away. Don’t leave it on the desk, and don’t pick it up “just to check something.” Treat it like a device that stays out of the testing flow until Math starts again.
Calculator Rules For SAT Math Modules And Device Checks
Built-In Desmos Calculator In Bluebook
Bluebook includes an embedded Desmos calculator with two options: scientific and graphing. You can switch between them during Math. That means you’re never stuck without a calculator, even if you don’t bring a handheld device.
Desmos is strongest when a picture beats a pile of arithmetic. A graph can confirm where two lines meet, show intercepts, and spot whether an equation has one solution or none. Still, Desmos won’t type numbers for you, so straight computation can be faster on a handheld calculator you know well.
Handheld Calculators You Can Bring
College Board allows handheld calculators that are non-CAS. Graphing calculators are allowed if they do not include CAS features. Scientific calculators are allowed. Four-function calculators are allowed too, yet many are clunky for SAT work since they can ignore order of operations and lack parentheses.
Desmos can do graphing and tables without menu digging. Plenty of students use a handheld calculator for number entry and Desmos when a graph saves steps.
CAS: The Feature That Gets A Calculator Blocked
CAS means computer algebra system. A CAS calculator can manipulate algebra symbolically—factoring, expanding, and solving equations while giving exact symbolic answers. According to the College Board, starting with the August 2025 SAT weekend administration, calculators with CAS functionality are not allowed for tests in the SAT Suite.
A fast check is the model name. If it has “CAS” in the name, it’s not allowed. If it can do symbolic algebra steps, leave it at home.
Other Features That Can Get You Stopped
Think “handheld and offline.” Calculators with QWERTY letter layouts are not allowed. Devices with wireless features are not allowed. Phones are not allowed as calculators. Smartwatches are not allowed as calculators. If it can connect, sync, or act like a mini computer, it’s a poor choice for test day.
There’s another rule that surprises people: only battery-operated, handheld equipment can be used for calculators. Power cords are not allowed for calculators in the test room. Batteries are your friend.
Clearing Programs, Notes, And Stored Documents
The rules aren’t just about the hardware. You’re expected to remove programs that have algebra functionality and clear stored documents from your calculator. That includes equation solvers, factoring tools, and anything that turns the calculator into a step-by-step algebra machine.
Do the clean-up early so you can practice with the same “clean” calculator you’ll use on test day. If you reset the calculator the night before, you can end up surprised by a mode change or a setting you rely on.
Sharing, Cases, Sound, And Ports
Students can’t share calculators. Bring your own. Any calculator case must stay under your desk. All sound needs to be off. If your calculator has an infrared data port, tape over it before you arrive.
These rules sound picky, yet they exist for a reason: they keep the room fair. A loud beep can pull attention from a whole row, and a visible data port can trigger a device check when you’d rather be solving the next question.
Reading And Writing Modules: Keep Calculators Out Of Play
Reading and Writing is screen-based and time-bound, and it rewards focus. Your calculator doesn’t help there, so keep it away. Put it in your bag or under your desk, depending on your test center’s directions.
If you like timing yourself, rely on the Bluebook timer. If you like scratch work, stick to paper. A calculator on the desk during Reading and Writing can draw a proctor’s attention, and that’s the last thing you need while you’re trying to stay in rhythm.
Choosing A Calculator That Won’t Slow You Down
The safest calculator is the one you already use in class and can operate without thinking. A new device can feel slick in your hand, then turn into a time sink once you’re trying to find a fraction setting under pressure.
Start with the official wording in the SAT Calculator Policy and match your device to the allowed categories. Since College Board focuses on prohibited features instead of a long approved list, your job is to avoid the banned features and keep your calculator clean of stored documents and algebra programs. For your bag list, see What to Bring on SAT Test Day.
Graphing Calculator Fit
Graphing calculators can shine on function questions, systems, and data sets. If you use one, get comfortable with the graph window, table view, and quick edits. Learn how to enter a line, shift the window, and read an intersection without hunting through menus.
Scientific Calculator Fit
Scientific calculators are fast for computation, fractions, exponents, and trig. Check your mode settings during practice, then reset to normal settings before test day. A wrong angle mode can turn a clean trig problem into a mess.
Basic Four-Function Fit
Four-function calculators can work, yet they’re slower on multi-step expressions. Use scratch paper for each step.
Using Desmos And Handheld Calculators With Good Habits
Calculator time is earned, not automatic. Some SAT questions are built to be done by hand fast. Others are built to reward a graph, a table, or a clean calculation. The skill is choosing the right tool per question.
Try this habit loop while you practice:
- Read the question and pick a tool before you touch any buttons.
- If the numbers are friendly, do it by hand and use a calculator as a check.
- If the math is messy, try Desmos for a graph or table, then confirm the result.
- Use estimation to catch a wild answer fast.
That last point is a lifesaver. A quick estimate can spot a decimal in the wrong place or a sign error. It’s a fast sanity check that doesn’t require any fancy features.
Test Day Calculator Checklist
| Task | Timing | Payoff |
|---|---|---|
| Confirm your calculator is non-CAS | Two weeks out | No last-minute device scramble |
| Clear stored documents and remove algebra programs | One week out | Smooth device check |
| Practice one full Math module using your setup | One week out | Comfort with timing and tools |
| Learn Desmos basics: zoom, table, intersections | One week out | Faster visual checks |
| Install fresh batteries | Three days out | Lower risk of shutdown |
| Pack spare batteries | Night before | Backup ready |
| Tape over infrared port, if present | Night before | Fewer interruptions |
| Turn off sound and clear alarms | Morning of | Quiet desk |
| Put calculator case under the desk | Start of testing | Meets desk rules |
| Switch to built-in Desmos if the handheld fails | During Math | Keep working with no panic |
Packing And Check-In Tips That Save Stress
Your calculator is one piece of the puzzle. You still need your testing device, admission ticket, and acceptable photo ID. College Board lists what to bring for test day, along with Bluebook setup steps and the note that the Math section includes an embedded graphing calculator.
Pack your calculator where you can reach it during seat setup. Keep batteries separate. If it has a sliding case, take it off before you sit and stash it under the desk.
When you arrive, follow the proctor’s directions closely. If you’re asked to show your calculator, show the front. Don’t argue. A calm minute now beats a longer interruption later.
If Your Calculator Dies Or You Forgot It
If your handheld calculator dies during Math, move straight to the built-in Desmos calculator and keep going. You can finish the Math section with Desmos alone. If you brought spare batteries and the proctor allows you to swap them at an allowed time, do it quickly and move on.
If you forgot your calculator, you can still test. Desmos is there in Bluebook. The trade-off is speed: if you’re used to a handheld button pad, Desmos may feel slower for computation. That’s why it’s smart to practice with both options at least a few times.
Quick Clarity On The Question People Keep Asking
Let’s circle back to the phrase that shows up in search bars: “are calculators allowed on the sat?” Yes for Math, no for Reading and Writing. During Math, you can use the built-in Desmos calculator in Bluebook or an approved handheld calculator. Avoid CAS, avoid wireless features, clear stored documents, remove algebra programs, and keep sound off.
Do that, and your calculator becomes what it should be: a tool that helps you move faster when the math gets messy, not a thing you worry about while you’re trying to earn points.