Macrame cord length calculator

Zero or negative finished length and unknown densities are rejected with invalid_input rather than inventing a cut list.

How to call the API and what the response contains

Failed validation is never billed. POST a JSON body with finished_length as a required strictly positive finite number and knot_density as one of loose, medium, dense, or extra_dense. Optional fringe_length and mounting_allowance default to zero and must be zero or positive when sent. Optional working_strands defaults to one so the primary result is cut length per working strand; optional filler_strands defaults to zero. Optional waste_percent is a cutting margin from zero to fifty applied after the body plus fringe plus mounting. Aliases include length, project_length, and body_length for the finished measure; density, knot_style, and tightness for the pack; fringe, tail_length, and ends for the tail; mounting, dowel_allowance, wrap, and larks_head for the top extra; working_cords, strands, and cords for the wrapping count; filler_cords, holding_cords, and core_cords for the straight cores; and waste, extra_percent, and allowance_percent for the margin. Absolute values of lengths must stay within one trillion so intermediate products remain finite in IEEE double precision on the Worker and in the browser. On success the body echoes rounded inputs, sets multiplier to the published factor, body_length to finished length times that factor, cut_length to the per-working-strand cut after waste, filler_cut_length to the per-filler cut, total_working_cord and total_filler_cord to the scaled families, total_cord to their sum, formula to a compact equation string, message to a short English summary, and steps to ordered substitution lines you can assert in tests. Pricing is a flat $0.002 per successful request with unit item.

Practical planning tips, units, plant hangers, and related searches

Keep one linear unit for the whole request. If you design in centimetres, enter finished length, fringe, and mounting in centimetres; if you think in inches, stay in inches. The calculator does not convert units. Measure finished length on a similar piece you already like, or on a sketched drop from hook to pot rim, then pick the density that matches how much open space your pattern leaves. Prefer this capability when you already know the finished drop and how tightly you will knot and only need the cut list; if you need yarn from stitch gauge, use a yarn tool instead. When you are unsure, start at medium and add a small waste percent rather than jumping to extra_dense, which over-cuts a sparse design. Lark's-head mounting on a thin ring often needs only a few units of extra; a thick branch or a wrapped dowel needs more—measure the path around the support and send that as mounting_allowance instead of guessing inside the multiplier. Count working cords and filler cords from the pattern diagram: a classic four-working plus two-filler hanger is working_strands four and filler_strands two. Pair examples when teaching: eighty units at medium with twenty of fringe and ten of mounting yields four hundred seventy per working strand; twenty-four units at dense with defaults yields one hundred sixty-eight per strand; finished_length zero demonstrates the hard invalid_input path. This landing targets people searching for a macrame cord length calculator, how much macrame cord to cut, working strand cut length, or knot density cord planner. It is not a crochet yarn estimator, not a knitting row counter, and not a full pattern generator. Failed tasks that return invalid_input do not consume prepaid balance. Round-trip checks are easy: multiply finished length by the published factor for the chosen density, add fringe and mounting, then confirm the product equals cut_length when waste is zero.