📏 Stretcher Bar Calculator
Canvas size needed for stretcher bar framing
About this calculator
The Stretcher Bar calculator sizes the wooden frame behind a stretched canvas. Enter the canvas dimensions and bar profile; it returns the cut lengths for each side, accounting for the mitered 45-degree corners, plus the total linear footage to buy. It also estimates the canvas needed with gallery-wrap margins.
Tip: buy bars slightly oversized if you are unsure — you can trim a frame down, but a frame built too small cannot be stretched back up without reordering stock.