Bobbin lace calculator
Bobbin Lace Repeat Calculator
Plan complete pattern repeats within a target strip length, including optional start and end allowances.
Use one consistent measurement unit for every field.
Formula: repeat zone = target length − start allowance − end allowance. Complete repeats that fit = floor(repeat zone ÷ repeat length). Repeats needed to reach or exceed = ceil(repeat zone ÷ repeat length).
Scope: This is a length planner. It does not decide how a specific lace pattern should start, turn a corner or finish.