THE NUMBERS, EXPLAINED
How to use this calculator.
Preserves dimensions under the measured gauge. Round to the nearest whole count; pattern repeats and shaping may require further adjustment. Swatches should be measured in their finished state.
Start with your inputs
Enter original stitches per 10 cm, measured stitches per 10 cm, original stitches, original rows per 10 cm, measured rows per 10 cm, original rows. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Original stitches per 10 cm | 20 |
| Measured stitches per 10 cm | 22 |
| Original stitches | 100 |
| Original rows per 10 cm | 30 |
| Measured rows per 10 cm | 33 |
| Original rows | 150 |
A worked example
With the example inputs above, exact stitch target is 110. Change the inputs to explore your own scenario.
Putting the example numbers into the formula
Exact stitch target
(100) × (22) ÷ (20) = 110
Rounded stitches
round((100) × (22) ÷ (20)) = 110
Exact row target
(150) × (33) ÷ (30) = 165
Rounded rows
round((150) × (33) ÷ (30)) = 165
| Result | Example answer |
|---|---|
| Exact stitch target | 110 |
| Rounded stitches | 110 |
| Exact row target | 165 |
| Rounded rows | 165 |
How this is calculated
Exact stitch target
c × b ÷ a
Rounded stitches
round(c × b ÷ a)
Exact row target
f × e ÷ d
Rounded rows
round(f × e ÷ d)
Symbols and units
- a
- Original stitches per 10 cm
- b
- Measured stitches per 10 cm
- c
- Original stitches
- d
- Original rows per 10 cm
- e
- Measured rows per 10 cm
- f
- Original rows
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Calculation steps and notation
round(x) rounds to the nearest integer, with exact halfway ties towards positive infinity.
Assumptions and limits
Preserves dimensions under the measured gauge. Round to the nearest whole count; pattern repeats and shaping may require further adjustment. Swatches should be measured in their finished state.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Exact stitch target; Rounded stitches; Exact row target; Rounded rows. The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Preserves dimensions under the measured gauge. Round to the nearest whole count; pattern repeats and shaping may require further adjustment. Swatches should be measured in their finished state.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
OpenStax: algebra and proportional reasoning ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
Read the quality report →