Teaching · Related Services

Feet flat, elbows level,
for every student.

Enter each student's seated measurements by code and the chairs and desks in the room. The page checks every pairing against published classroom-furniture criteria, says how far off it is and what fixes it, and finds the best fit already in the room.

Open the toolWhat you get
$12one-time · every device you sign in on
Buy · $12

Included with Caveat Classroom and Whole-school licenses. Or get it in the Related Services toolkit, $99 for 96 items.

The comparison

The worked example is a made-up Room 4B: six students measured by code, three chair sizes and three desk heights. Change anything; your work saves in this browser.

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What you get

Teaching · Related Services$12 · included with Classroom and Whole-school licenses

What you finish with
For each student, a fit check of seat height, seat depth and desk height against a match range computed from their own measurements, the size of any mismatch, the footrest, cushion or height change that would fix it, and the best chair and desk the room already has. Prints a room report and downloads it as a spreadsheet.
Who it is for
Occupational and physical therapists, special education and classroom teachers, school nurses and facilities staff setting up classrooms or responding to a seating concern.
Format
Browser tool, centimeters or inches. Prints a room report; downloads the report as a spreadsheet (.csv); export and import a file.
Access
$12 one-time, yours on every device you sign in on; the tool opens once you are signed in with it. Included with Caveat Classroom and Whole-school licenses. Also in the Related Services toolkit ($99) and the Teaching Suite pass ($199), and 1 more bundle. Everything you type stays in this browser; nothing is sent to Caveat.
Where it lives
The Related Services space in Caveat Teaching.
Support
Questions, a correction or a request: team@caveatacademic.com.

How to use it

  1. Load the worked example, or start blank.
  2. On the Furniture tab, add each chair (seat height and depth) and desk height in the room.
  3. On the Students tab, add each student by code with four seated measurements. How to measure shows where each one goes.
  4. Read the Fit report: each meter shows the match range and where the current furniture sits; fixes appear under anything that is off.
  5. Assign the best set the room has with one click, then print the report for the team or facilities.

Open the tool

How a match is decided

The criteria come from studies of classroom furniture and student body size.

Seat height and depth

Seat height matches when the knee angle stays between about 90 and 120 degrees with feet flat: from popliteal height × cos 30° up to popliteal height × cos 5°, with a shoe allowance (3 cm unless you change it) added to the barefoot measurement. A higher seat leaves the feet dangling and presses the thighs; a lower one lifts the knees above the hips.

Seat depth matches between 80 and 95 percent of buttock-to-knee length, so the thighs are supported without the seat edge pressing behind the knees. The footrest suggested for a high seat is the height that brings the seat back into range.

Desk height and the best fit

Desk height is judged against the chair the student actually uses: at least seat height plus elbow height sitting, so the forearms rest without leaning down, and no more than seat height + 0.8517 × elbow height + 0.1483 × shoulder height, which keeps the shoulders from lifting more than about 25 degrees. Without shoulder height the page uses elbow height plus 5 cm.

Best in this room tries every chair and desk pairing and picks the one with the smallest total mismatch, counting seat height double because it decides the whole posture.

A screen of furniture fit from measurements, not a seating or positioning assessment. Students with postural, mobility or sensory needs need an individual assessment by an occupational or physical therapist.

Sources

  1. Castellucci, H. I., Arezes, P. M., and Viviani, C. A. (2010). Mismatch between classroom furniture and anthropometric measures in Chilean schools. Applied Ergonomics, 41(4), 563–568. Seat height, seat depth and desk height match equations.
  2. Gouvali, M. K., and Boudolos, K. (2006). Match between school furniture dimensions and children's anthropometry. Applied Ergonomics, 37(6), 765–773. The desk height range from elbow and shoulder height sitting.
  3. Parcells, C., Stommel, M., and Hubbard, R. P. (1999). Mismatch of classroom furniture and student body dimensions. Journal of Adolescent Health, 24(4), 265–273. Measurement of popliteal height, buttock-popliteal length and elbow rest height, and the shoe allowance.
  4. Castellucci, H. I., Arezes, P. M., Molenbroek, J. F. M., de Bruin, R., and Viviani, C. (2017). The influence of school furniture on students' performance and physical responses: results of a systematic review. Ergonomics, 60(1), 93–110.

The worked example is made up. Furniture sizes and measurements are examples, not a standard for any school. Support: team@caveatacademic.com.