Leg · Furniture · Common
Buttock Knee Length
The length from the buttock to the knee.
ButtockKneeLength
How to measure
Application
Used in vehicle, theatre, and aircraft seating design to determine the minimum fore-aft clearance required in front of a seated occupant.
Posture
Sit upright on a firm, flat surface with knees bent to 90° and feet flat on the floor.
Landmark
Measured horizontally from the back of the buttock to the front of the kneecap.
Tool
Tape measure or rigid ruler.
Common mistake
Slouching shifts the buttock forward on the seat and shortens the result. Sit fully upright against a backrest.
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": "ButtockKneeLength",
"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.