A smart board is an interactive whiteboard: a touch-enabled display you write on, annotate on and teach from. This guide gives you the interactive whiteboard sizes in meters for 55, 65, 75, 86, 98 and 110-inch interactive flat panels, then shows how to match each one to your classroom area, viewing distance and wall space. You will also see it called an interactive display board, an interactive electronic whiteboard or a smart whiteboard for teaching; in this guide they all mean the same classroom screen. If you want a plain-language explanation of the technology first, start with our article what is a smart board.
In this guide
Every interactive flat panel in this table uses a 16:9 screen. The width and height below are the visible screen area; the outer frame adds a few extra centimeters on each side, so always confirm the final cut-out and mounting dimensions on the product datasheet.
| Screen Size (Inch) | Screen Width × Height | Best Classroom Area | Detailed Content (4× Height) | Max Reading Distance (6× Height) | ម៉ូដែល QtenboardComment |
|---|---|---|---|---|---|
| 55" | ~1.22 m × 0.68 m | < 25 m² | 2.7 m | 4.1 m | QM-55HY |
| 65" | ~1.44 m × 0.81 m | 25 – 40 m² | 3.2 m | 4.9 m | QM-65HY |
| 75" | ~1.66 m × 0.93 m | 40 – 60 m² | 3.7 m | 5.6 m | QM-75HY |
| 86" | ~1.90 m × 1.07 m | 60 – 75 m² | 4.3 m | 6.4 m | QM-86HY |
| 98" | ~2.17 m × 1.22 m | 75 – 90 m² | 4.9 m | 7.3 m | QM-98HY |
| 110" | ~2.44 m × 1.37 m | 90 m²+ / lecture halls | 5.5 m | 8.2 m | QM-110HY |
Viewing distances are rules of thumb based on screen height. The reasoning is explained in section 2.
Choosing the right size for interactive boards for schools starts with two numbers: the floor area of the room and the distance from the board to the back row. The table below turns both into a recommended interactive flat panel size. You can browse the full range of interactive whiteboards for school to compare configurations once you know your size.
| ប្រភេទ ថ្នាក់ | ទំហំ (m²) | ក្ដារ សំ អន្តរសកម្ម ដែល បាន ផ្ដល់ អនុសារ | Back-Row Distance |
|---|---|---|---|
| Huddle / Small Group Room | < 25 m² | 55-inch 4K interactive flat panel for small rooms | Up to 4 m |
| Small Classroom | 25 – 40 m² | 65-inch 4K 65 inch interactive flat panel | Up to 5 m |
| សៀវភៅ ស្តង់ដារ | 40 – 60 m² | 75-inch 4K 75 inch interactive whiteboard | Up to 5.6 m |
| Large Classroom / Lab | 60 – 75 m² | ៦៨ អ៊ីមែល 86 inch 4K interactive flat panel | Up to 6.4 m |
| Lecture Hall / Training Center | > 75 m² | 98-inch or 110 inch interactive whiteboard for auditoriums | 7 m and beyond |
These bands are a practical starting point when planning smart boards for classroom use in primary and secondary schools, universities and training centers. They help you balance visibility, budget and installation space before you request a quote.
A 65-inch interactive whiteboard has a screen of roughly 1.44 meters wide and 0.81 meters tall. That is large enough for every seat in a compact room and small enough to fit on a single wall section next to windows or cabinets. For early-years rooms, take a look at the interactive whiteboard for kindergarten, and for compact 65-inch classroom builds see the 65 inch infrared-touch classroom whiteboard.
A 75-inch interactive flat panel measures about 1.66 m × 0.93 m. Its extra height keeps text, diagrams and video readable for students in the back rows, which is why it suits most standard classrooms. Qtenboard also builds this size for local school projects, such as the interactive whiteboard flat panel for Thailand schools.
Choose 75-inch when your back row sits within about 5.5 meters of the board, when lessons mix text, diagrams and video, and when you want one size that works across many rooms in the same school.
Move up to 86-inch when students sit more than 6 meters from the board, when you display small-print material such as spreadsheets or engineering drawings, or when the classroom is long and narrow.
Large rooms need either an 86-inch panel or a 98 to 110-inch interactive display for classes with 40 or more students. The 98 inch AI interactive whiteboard and the 110 inch interactive flat panel both run 4K, support 20–50 touch points and come with OEM/ODM options for education distributors.
The easiest way to plan any interactive board in classroom projects is to use the screen height, not the diagonal. Content stays comfortable to read when the farthest student sits no more than about six times the screen height away.
The room is 42 m² and the board sits on the short wall, so the back row is about 6 meters away. A 75-inch panel reaches a comfortable 5.6 meters for large-print content, which works for most lessons. If the teacher regularly shows small text, upgrading to an 86-inch panel (6.4 m maximum) gives the back row more margin.
When you compare 75 inch interactive whiteboard dimensions with 65-inch and 86-inch models, focus on real teaching needs before price. These are the factors that change the decision most often.
All Qtenboard education panels use 4K UHD (3840 × 2160) resolution with 350–450 cd/m² brightness and a 178° viewing angle. A 75-inch screen spans about 1.66 meters, which keeps content clear for students sitting at an angle without distortion. For a deeper look at screen specs, read our guide to choosing an interactive whiteboard.
Long or fixed-seating classrooms perform better with a larger interactive flat panel, because the back rows stay inside the 6× rule. Wide, shallow rooms can often use a smaller panel without losing readability.
Measure the free wall width, not just the room area. A 65-inch panel needs about 1.5 m of clear width, a 75-inch about 1.7 m and an 86-inch about 2 m. Where the wall is crowded, a 65-inch is easier to mount, and a mobile interactive flat panel with stand lets one display serve several rooms.
Interactive whiteboard for schools price depends mainly on screen size, chipset, RAM and ROM configuration, touch points and order quantity. Larger sizes cost more, so matching the size to the room avoids paying for screen area that students cannot use. If you want to see how the wider interactive whiteboard market is moving, our 2026 trends article covers AI, 8K and touchless technology.
To ensure comfortable viewing and easy reach for both teachers and students, the installation height of an interactive whiteboard follows industry best practices:
Use the table to check that the top of the screen stays below your ceiling, projector rails or high windows. Values add the screen height to the bottom mounting height.
| ទំហំ អេក្រង់ | Screen Height | Top Edge (Bottom at 0.9 m) | Top Edge (Bottom at 1.0 m) |
|---|---|---|---|
| 65" | 0.81 m | 1.71 m | 1.81 m |
| 75" | 0.93 m | 1.83 m | 1.93 m |
| 86" | 1.07 m | 1.97 m | 2.07 m |
| 98" | 1.22 m | 2.12 m | 2.22 m |
| 110" | 1.37 m | 2.27 m | 2.37 m |
Many schools compare traditional dry-erase boards with modern interactive displays when planning classroom upgrades. The diagonal size sounds larger on a panel, but the writing area is very different:
| Board Type | ទំហំ ធម្មតា | Approx. Surface Area |
|---|---|---|
| Traditional whiteboard | ~1.2 m × 2.4 m | 2.88 m² |
| 65" interactive panel | ~1.44 m × 0.81 m | 1.16 m² |
| 75" interactive panel | ~1.66 m × 0.93 m | 1.55 m² |
| 86" interactive panel | ~1.90 m × 1.07 m | 2.04 m² |
Interactive flat panels use less wall width and remove the need for markers, erasers and cleaning. If teachers still want a large handwriting surface, pair the panel with a push-pull board or nano blackboard from the accessories range, so you keep a big writing area and the benefits of a smart screen.
Once you have chosen a size, compare the features that decide how the panel performs every day. Whichever interactive flat panel display you shortlist, check it against the points below. Qtenboard builds its education whiteboard specs around daily school use, durability and student health.
The panel is only one part of a modern classroom. A complete ដំណោះស្រាយ ថ្នាក់ ឌីជីថល adds mobile or electric lift stands, OPS computers, ceiling microphones, a PTZ camera, a lecture capture recorder and central control, all managed together.
For hybrid lessons, an interactive flat panel for hybrid classrooms adds a camera, microphone array and screen sharing for remote learners. The same display family also works as an interactive smart board in meeting rooms, where our interactive whiteboard meeting solutions cover boardrooms and training spaces.
Schools in Singapore and across Southeast Asia often add education digital signage in lobbies and corridors, so the same supplier can provide teaching displays and campus information screens. You can see how these setups look in practice on our successful cases page.
Qtenboard supplies interactive boards for education and interactive touch boards for schools from 55 to 110 inches. Each smart board interactive flat panel comes with Android, Windows or dual-system options plus OEM, ODM, CKD and SKD customization. Start from the size that matches your classroom:
Buying for a distributor or a school group? Our AI interactive flat panel OEM factory for schools page explains bulk supply and customization, and you can browse every model on the products page.
Q: តើ អ្វី ជា ទំហំ ក្ដារ សំឡេង អន្តរសកម្ម?
A: 75-inch is the most common choice for typical 40–60 m² classrooms. It balances visibility, wall space and cost. Use 65-inch for small rooms and 86-inch or larger for long or high-capacity rooms.
Q: What is the standard size of a whiteboard for a classroom in meters?
A: For modern smart boards, a 75-inch screen measures about 1.66 m × 0.93 m, while a 65-inch measures about 1.44 m × 0.81 m. Traditional dry-erase boards are often about 1.2 m × 2.4 m.
Q: តើ ក្ដារ សំណួរ អន្តរកម្ម ៦៥ អ៊ីស្រាអែល តូច ពេក សម្រាប់ ថ្នាក់ ?
A: It depends on viewing distance and room size. A 65-inch panel works well for rooms up to about 40 m² where the back row is within 5 meters, but it may lack clarity in large or long classrooms.
Q: How far can students sit from an interactive flat panel?
A: A good rule is 4 to 6 times the screen height. For a 75-inch panel (0.93 m high) that is about 3.7 to 5.6 meters, and for an 86-inch panel about 4.3 to 6.4 meters.
Q: How high should I mount an interactive whiteboard in a classroom?
A: Mount the bottom of the screen 0.9 m to 1.0 m above the floor. This keeps the lower part reachable for younger students and the top within comfortable eye level for most rows.
Q: Is a smart board the same as an interactive whiteboard?
A: In everyday use, yes. A smart board is an interactive whiteboard, and modern versions are interactive flat panels with built-in computing. Our complete guide to interactive whiteboards explains the differences in more detail.
Q: ហេតុ អ្វី ជា 4K សំខាន់ សម្រាប់ ក្ដារ សម្ងាត់ អន្តរសកម្ម?
A: 4K resolution delivers sharper text and clearer images, which improves readability for students at the back and helps reduce eye strain during long classes.
Q: Can I get more answers about touch points, systems and certifications?
A: Yes. Our interactive whiteboard FAQ covers sizes, touch points, operating systems, EDLA, wireless sharing and OEM/ODM questions.
Choosing the right interactive whiteboard requires matching your classroom size, layout, student viewing distance and budget. For most standard classrooms, a 75-inch smart board is the most practical choice. Small rooms can use 65-inch models, while lecture halls benefit from 86-inch or larger interactive flat panels.
With Qtenboard’s 4K display, anti-glare glass, eye-protection design and durable build, you get an interactive whiteboard for schools made for long-term daily use. If you are not sure which size fits your room, send us your classroom dimensions and our team will recommend a configuration and quote.
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