Chair Seat Height Popliteal Fit Checker
Compare loaded/compressed actual seat height with measured popliteal support plus footwear under caller offset policy; no percentile substitute, posture diagnosis or recommended chair setting.
Description
Loaded seat height differs from its unloaded setting.
Loaded seat height differs from its unloaded setting. Footwear raises the measured leg-support reference.1
Enter nonnegative centimeter values and an ordered finite caller offset pair; compression cannot exceed unloaded seat height. Return loaded seat/support heights, signed offset and inclusive fit.
When to use Chair Seat Height Popliteal Fit Checker
Use Chair Seat Height Popliteal Fit Checker when you need to evaluate the supplied records under the calculation and evidence rules below. No recommended chair setting, percentile substitute or posture diagnosis is supplied.
Prepare measured task, body, furniture or already weighted exposure records. Supply independently verified caller policies, tables and comparison limits with matching units and conditions.
How to use Chair Seat Height Popliteal Fit Checker and understand its results
- Prepare measured task, body, furniture or already weighted exposure records. Supply independently verified caller policies, tables and comparison limits with matching units and conditions.
- Enter unloadedSeatHeightCm, measuredCushionCompressionCm, measuredPoplitealHeightCm, shoeSoleHeightCm, callerSeatMinusSupportBoundsCm using the field table and calculation rules, then run the tool.
- Read loadedSeatHeightCm, shoeAdjustedPoplitealHeightCm, signedSeatMinusLegSupportCm, withinCallerSeatFit. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| unloadedSeatHeightCm | Unloaded seat height cm | number | Required |
| measuredCushionCompressionCm | Measured cushion compression cm | number | Required |
| measuredPoplitealHeightCm | Measured popliteal height cm | number | Required |
| shoeSoleHeightCm | Shoe sole height cm | number | Required |
| callerSeatMinusSupportBoundsCm | Caller seat minus support bounds cm | list of number | Required |
Enter nonnegative centimeter values and an ordered finite caller offset pair; compression cannot exceed unloaded seat height. Return loaded seat/support heights, signed offset and inclusive fit.
loaded=seat−compression; support=popliteal+sole; offset=loaded−support Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| loadedSeatHeightCm | Loaded seat height cm | number |
| shoeAdjustedPoplitealHeightCm | Shoe adjusted popliteal height cm | number |
| signedSeatMinusLegSupportCm | Signed seat minus leg support cm | number |
| withinCallerSeatFit | Within caller seat fit | boolean |
{
"input": {
"unloadedSeatHeightCm": 45,
"measuredCushionCompressionCm": 3,
"measuredPoplitealHeightCm": 40,
"shoeSoleHeightCm": 2,
"callerSeatMinusSupportBoundsCm": [
-2,
1
]
},
"output": {
"loadedSeatHeightCm": 42,
"shoeAdjustedPoplitealHeightCm": 42,
"signedSeatMinusLegSupportCm": 0,
"withinCallerSeatFit": true
}
}Limitations and assumptions
No recommended chair setting, percentile substitute or posture diagnosis is supplied.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Numeric lists are limited to 10,000 entries; string lists to 128 strings of at most 128 characters each. The rules above may impose smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors. A successfully returned false flag is an evaluated outcome; its meaning is explained above.
Alternative or Complementary methods
Use Anthropometric Thigh Clearance Desk Underside Checker: Thigh clearance depends on loaded seat height, desk underside and measured thigh thickness. Movement allowance adds to static space needs. For a complementary task, use Seat Depth Buttock-Popliteal Fit Checker: Seat-depth fit is an observed behind-knee gap check. Sample coverage describes measured people rather than a population percentile.
References
-
Chair Seat Height Popliteal Fit Checker — tool.io
Similar or alternative tools
- Anthropometric Thigh Clearance Desk Underside Checker
Thigh clearance depends on loaded seat height, desk underside and measured thigh thickness. Movement allowance adds to static space needs.
- Seat Depth Buttock-Popliteal Fit Checker
Seat-depth fit is an observed behind-knee gap check. Sample coverage describes measured people rather than a population percentile.