What size is a 3 × 4 ft white board in cm?

91 × 122 cm, which is 12 square feet of writing area. The conversion uses 1 ft = 30.48 cm and rounds to the nearest centimetre for ordering.

Which is the largest standard board size?

8 × 4 ft — 244 × 122 cm, or 32 square feet. Anything beyond the listed sizes is treated as a made-to-order board rather than a catalogue size.

Can a board be hung vertically instead of horizontally?

Yes. Plusmark boards in the standard framed ranges are supplied for flexible mounting and can be hung horizontally or vertically, which is useful on a narrow wall where the landscape orientation will not fit.

Sizing

White Board Size Chart: Every Standard Size in Feet, Centimetres and Square Feet

Published 23 October 20266 min read

Board sizes in India are quoted in feet, but walls are measured in centimetres, quotes are compared by area, and classroom furniture is planned in metres. This page converts the whole Plusmark standard size list once, so you do not have to redo the arithmetic for every enquiry.

Centimetre values are exact conversions rounded to the nearest centimetre (1 ft = 30.48 cm), so a 3 × 4 ft board is 91 × 122 cm. The use column is a rule of thumb drawn from how these boards are typically installed — it is not a specification, and the same size works in very different rooms.

Every standard board size, converted

These sizes appear across the Plusmark catalog for white boards, chalk boards, magnetic boards and notice boards. Availability by series is in the next section; the list below is the full span, from the smallest desk board to the largest lecture-hall board.

Size (ft)	Size (cm)	Area	Where this size usually goes
1 × 1 ft	30 × 30 cm	1 sq ft	Desk board, home study corner, staff room reminders
1 × 1.5 ft	30 × 46 cm	1.5 sq ft	Cabin door board, short notices, key control points
1 × 2 ft	30 × 61 cm	2 sq ft	Home study, small office, counter note board
1.5 × 2 ft	46 × 61 cm	3 sq ft	Tuition room, cabin, narrow wall between windows
1.5 × 3 ft	46 × 91 cm	4.5 sq ft	Reception, planning corner, corridor notice point
2 × 2 ft	61 × 61 cm	4 sq ft	Meeting room, workshop instruction board
2 × 3 ft	61 × 91 cm	6 sq ft	Classroom, coaching room, small conference room
2 × 4 ft	61 × 122 cm	8 sq ft	Lecture room side wall, notice display, staff board
3 × 4 ft	91 × 122 cm	12 sq ft	Main classroom board, conference room writing wall
4 × 4 ft	122 × 122 cm	16 sq ft	Large notice display, locked acrylic cover installations
5 × 4 ft	152 × 122 cm	20 sq ft	College lecture room, hall corridor display
6 × 4 ft	183 × 122 cm	24 sq ft	Auditorium, seminar hall, big roster board
8 × 4 ft	244 × 122 cm	32 sq ft	Lecture hall front wall, examination and event display

Which series is made in which sizes

The size range you can order depends on the series. Eco Premium and Eco Regular boards start small — from 1.5 × 2 ft — while Metallic Premium and Deluxe Standard framing begins at 3 × 4 ft. Both groups reach the same 8 × 4 ft top end; what changes is the small end of the range, because heavy-duty framing on a small board is rarely worth the money.

Standard sizes therefore run from small 1 × 1 ft desk boards up to 8 × 4 ft classroom and lecture-hall boards. If your enquiry sits between two listed sizes, you are not restricted to the chart.

Metallic Premium and Deluxe Standard: 3 × 4 ft up to 8 × 4 ft
Eco Premium and Eco Regular: 1.5 × 2 ft up to 8 × 4 ft
Desk and home boards: from 1 × 1 ft
Larger or non-standard sizes: made to order as per customer requirement

Acrylic door cover boards keep their own size sets

Locked notice display is sized differently because the door has to swing. Deluxe acrylic door cover boards in the single-door format come in 2 × 3 ft, 2 × 4 ft, 3 × 4 ft and 4 × 4 ft; the double-door format starts where a single door becomes awkward, at 5 × 4 ft, 6 × 4 ft and 8 × 4 ft. ECO acrylic door cover boards run 1.5 × 2 ft, 2 × 3 ft, 2 × 4 ft, 3 × 4 ft and 4 × 4 ft.

That is why a 4 × 4 ft notice wall and a 6 × 4 ft notice wall are not the same purchase — the second needs double doors, which changes the framing as well as the size.

Measuring the wall before you choose a size

Mark the widest span the board can occupy, then subtract. Corners and switches take a couple of inches at each end, and a board hung above an existing platform or dais has to clear it at writing height, not at its bottom edge.

Plusmark boards are framed for either orientation, so a 3 × 4 ft board can go up landscape or portrait on the same wall. Vertical hanging is what makes narrow walls usable — the same board hung portrait fits where landscape will not.

Finally, count what has to fit, not the wall. A board that comfortably holds four A4 charts side by side is a very different order from one meant for a working list of thirty names, and the second usually needs the extra height rather than extra width.

Putting the size into your enquiry

Quote the size the way the catalog lists it — feet first, then orientation if it matters, then quantity and the room it is going into. Add the wall measurement if you are between sizes, because non-standard sizes are made to order and the team needs the exact figure to confirm what is possible.

If you are weighing two sizes against each other, send both in one enquiry. Rate and availability for institutional orders are confirmed against the specific requirement rather than published on this site, and one enquiry covering both sizes gets a straight answer faster than two enquiries covering one each.

Questions on this topic

What size is a 3 × 4 ft white board in cm?: 91 × 122 cm, which is 12 square feet of writing area. The conversion uses 1 ft = 30.48 cm and rounds to the nearest centimetre for ordering.
Which is the largest standard board size?: 8 × 4 ft — 244 × 122 cm, or 32 square feet. Anything beyond the listed sizes is treated as a made-to-order board rather than a catalogue size.
Can a board be hung vertically instead of horizontally?: Yes. Plusmark boards in the standard framed ranges are supplied for flexible mounting and can be hung horizontally or vertically, which is useful on a narrow wall where the landscape orientation will not fit.

Sizes, surfaces and frame variants listed here are made to order. Send Plusmark your room details and quantity and the team will confirm what is available in that series.