Input variables
| Variable | Meaning | Unit |
|---|---|---|
| w | Design width | stitches |
| h | Design height | stitches |
| count | Fabric threads or holes per inch | count/in |
| over | Threads per stitch | threads |
| border | Extra fabric on each side | in |
Equations
Design width · in
designw = w*over/count
Design height · in
designh = h*over/count
Cut fabric width · in
cutw = designw+2*border
Cut fabric height · in
cuth = designh+2*border
Notation
PI means π. ** means a power, sqrt means square root, and abs gives the absolute value. Trigonometric functions use radians. min and max select the smallest or largest argument.
ceil rounds upward, floor rounds downward, and round rounds to the nearest integer with halves toward positive infinity. roundup(value, step) rounds upward to the next multiple of the step; a zero step leaves the value unchanged.
Assumptions
- Aida commonly uses one hole interval per stitch; evenweave stitched over two threads uses a value of 2.
- Check whether the supplied fabric count is threads or stitches per inch.
- The border is added independently to all four sides.
- Framing, lacing and hoop placement may need more surrounding fabric.
Precision and verification
The tool uses ordinary double-precision numeric arithmetic. Output is displayed to at most four decimal places; measurement precision is usually much lower. Check the worked examples, your project’s specifications, and a real sample before committing material.