Leg · Furniture · Common
Buttock Popliteal Length
The length from the buttock to the back of the knee.
ButtockPoplitealLength
How to measure
Application
Used in seat depth design. A seat deeper than this measurement presses into the back of the knee and restricts circulation.
Posture
Sit upright on a firm, flat surface with knees bent to 90°.
Landmark
Measured horizontally from the back of the buttock to the back of the knee crease.
Tool
Tape measure or rigid ruler.
Common mistake
Confuse this with buttock-knee length. The endpoint here is the back of the knee crease, not the front of the kneecap. This measurement is always shorter than buttock-knee length.
API example
Request a predicted value for a 34-year-old woman at the 50th percentile in the United States. Adjust age, percentile, gender, and country to match your design scenario.
POST https://api.humanform.app/v1/predict
Authorization: Bearer hf_live_...
Content-Type: application/json
{
"measurement": "ButtockPoplitealLength",
"gender": "Female",
"age": 34,
"percentile": 50,
"country": "US",
"unit": "cm"
}Response values depend on age, percentile, gender, and country. Create a free dashboard account to run live predictions.
See design examples for worked scenarios that combine multiple measurements, or read the methodology page for percentile-based design thinking.
Explore the dataset
Humanform covers 148 measurements with country-adjusted predictions and separate female and male profiles. Browse the full inventory or read the API reference for request syntax.