Calculator
Two calculators in the app:
- The big one: opened from More → Calculator, from the pattern reader header, from the PDF viewer tools, or from the calculator icon next to a project's gauge row. A quick-math card up top, then the craft tools: gauge swatch, stitch resize, even shaping, skeins needed.
- The little one: inline four-function calculator inside the PDF viewer's tools dial. Quick arithmetic mid-row without leaving the PDF.
This page covers the big one.
Quick math
At the top: a four-function calculator with parentheses, for the in-between numbers ("3 skeins × 175 m"). Below it, the craft sections stack vertically; scroll through them and fill in just the one you need. The others stay empty.
Gauge swatch
You knit a swatch. You measure it:
- Number of stitches across.
- Over what width (cm or in).
- Number of rows down.
- Over what height.
The calculator gives you stitches-per-cm and rows-per-cm (or per-inch), plus a hint at the implied yarn weight.
Stitch resize
You have a pattern. The pattern was knit at a certain gauge, but you knit at a different gauge. How many stitches do you cast on to hit the same finished dimensions?
- Pattern's gauge (sts × rows / over).
- Your actual gauge.
- The pattern's original stitch count.
Output: the stitch count you need at your gauge. Same for rows.
Even shaping
You need to decrease (or increase) some number of stitches evenly across a row.
- Total stitches.
- How many to decrease (or increase).
- Edge padding optional.
Output: an instruction string like "k4, k2tog, k7 until 6 sts, k6", what you'd write into a custom shaping row.
The calc rounds in favour of leaving extra rather than running short.
Skeins needed
You estimate the project needs X meters of yarn. Each skein is Y meters. How many skeins do you buy?
Output: skeins (rounded up), with +10% and +20% safety lines so you can pick your risk tolerance.
Seeding from a project
Open the calculator from a project's gauge row (the calculator icon next to the actual-gauge line) and the gauge swatch opens pre-filled with what you recorded. Saves you re-typing.
Open from the pattern reader header and no specific gauge is pre-loaded (there's no project context).
Tips
- Stitches-per-cm is more precise than per-10cm, but the display shows the span you typed (so "22 sts over 10 cm" stays as written; the math is done at higher precision under the hood).
- Quick math handles negative numbers, decimals, and parentheses fine, but doesn't have scientific functions (sin/cos/log). Use your phone's built-in calculator if you need those.