$StitchGauge = {SwatchStitches \over SwatchWidth}$ $RowGauge = {SwatchRows \over SwatchHeight}$
$TotalStitches = DesiredWidth \times StitchGauge$ $TotalRows = DesiredHeight \times RowGauge$
$SwatchArea = SwatchWidth \times SwatchHeight$ $ProjectArea = DesiredWidth \times DesiredHeight$ $YarnDensity = {SwatchWeight \over SwatchArea}$ $TotalWeight = ProjectArea \times YarnDensity$
$YardsPerGram = {SkeinYardage \over SkeinWeight_{g}}$ $TotalYardage = TotalWeight_{g} \times YardsPerGram$ $TotalSkeins = \lceil {TotalYardage \over SkeinYardage} \rceil$
$StitchDifference = TargetStitches - CurrentStitches$ $StitchRatio = \lfloor {CurrentStitches \over StitchDifference} \rfloor$