ACS exam-day guide
ACS · Prepare for the day ahead.
Your checklist
Government-issued photo ID
Bring the original, unexpired ID that matches the name on your exam registration. A driver's license or passport is typical. Confirm with the provider which forms of ID are accepted and whether a secondary ID is required; policies vary by test center and delivery method.
Exam admission confirmation
Print or save the confirmation email or admission ticket showing your appointment time, test center address (or online proctoring link), and registration number. Some centers ask to see it at check-in. Confirm with the provider whether a printed copy is required or a digital copy is acceptable.
Know your test center route and arrival time
Plan to arrive at least 30 minutes before your scheduled start to allow for check-in and security. Verify the address and parking or transit options the day before. Arrival cut-off rules differ by provider, so confirm with the provider how late you may arrive and still be admitted.
Review the calculator and reference-sheet policy
ACS exams vary in what aids are permitted. Check the current candidate guide for your specific exam to learn whether a calculator, periodic table, or formula sheet is provided on-screen or must be requested. Do not bring your own unless the provider explicitly allows it.
Personal items plan
Most testing rooms do not allow phones, smart watches, notes, or bags at your desk. Plan where these will go (locker, car, or home). Confirm with the provider what storage is available and what is prohibited.
Comfort and timing logistics
Bring water and a light snack if the provider allows them during breaks, and dress in layers because room temperatures vary. Confirm with the provider whether food and drink are permitted in the testing room or only during scheduled breaks.
Medical or accessibility accommodations
If you have approved accommodations, bring the approval letter and follow the provider's instructions for checking in. Request accommodations well before exam day; last-minute requests are often not possible. Confirm deadlines with the provider.
Rest and study wind-down
The night before, stop new study and prioritize sleep. Cramming new material in the final hours tends to increase anxiety without improving recall. Review only summary sheets you already know well.
Backup plan for technology (online proctoring)
If your exam is remotely proctored, test your computer, camera, microphone, and internet connection in advance, and have a backup connection (hotspot) ready. Confirm with the provider the system requirements and the check-in window.
Watch and timekeeping
Many testing interfaces show a countdown clock, but a simple non-smart watch can help you pace. Confirm with the provider whether watches are allowed; smart watches are almost always prohibited.
Emergency contact and provider phone number
Save the test center or provider contact number in case of delay or illness. If you cannot attend, contact the provider as early as possible to learn your reschedule options. Reschedule and refund policies vary; confirm with the provider.
Read the current candidate guide
Policies on ID, calculators, breaks, and scoring can change. Review the official candidate guide for your specific ACS exam in the week before the test. If anything is unclear, confirm with the provider rather than assuming.
Plan the day
Confirm your appointment time, location or online link, and ID requirements. Re-read the candidate guide for your exam's rules on calculators, reference materials, and breaks. Do a final review of high-yield topics using your own summary notes, and take one short practice set to check pacing rather than to learn new content. Stop intensive study at least 24 hours before the exam.
Pack your ID, confirmation, and any approved items in one place. Plan your route and arrival time, including traffic and parking, or test your proctoring setup if online. Eat a normal meal, avoid alcohol, and go to bed at your usual time. Do not start new topics; if you review, use only brief summary sheets.
Eat a normal breakfast and arrive early. Leave your phone and smart watch stowed as instructed. At check-in, follow the proctor's directions for ID verification and secure any personal items. Use the restroom before the exam begins. If you are running late, call the provider immediately to ask about admission; do not assume you will be let in.
Read the instructions on the interface before starting. Pace yourself using the on-screen clock: answer the questions you know first, flag uncertain ones, and return to them if the interface allows. Watch for units, significant figures, and chemical formulas, and eliminate clearly wrong options on multiple-choice items. Take scheduled breaks only if permitted, and budget time to review flagged questions before the end.
Rules to check
Bring the original, unexpired government-issued photo ID that matches your registration name. Expired or photocopied IDs are commonly rejected. Confirm with the provider which ID types are accepted and whether a second form is needed.
Arrive before the scheduled start and follow the provider's late-arrival policy. Many centers deny admission after a cut-off time, so confirm with the provider how late you may arrive and whether a fee applies.
Do not bring unauthorized materials such as notes, phones, smart watches, or your own calculator unless the provider explicitly permits them. Possession of prohibited items can lead to dismissal, so confirm the allowed-items list with the provider before exam day.
Follow all proctor instructions, including identity verification, seating, and room conduct. If you have a question or a technical problem during the exam, raise your hand or use the proctoring chat rather than troubleshooting on your own.
Breaks are typically limited and may not stop the clock. Confirm with the provider whether unscheduled breaks are allowed, whether the timer pauses, and what you may access during a break.
Understand the scoring format for your exam. ACS exams are generally multiple-choice and may be scored on a scaled basis with national percentile information; the exact reporting method is set by the exam program. Confirm with the provider how and when scores are released.
If you are ill or cannot attend, contact the provider as soon as possible to discuss rescheduling. Do not attempt to test while ill if the provider's policy prohibits it. Reschedule, refund, and no-show rules vary, so confirm with the provider.