Increase / Decrease Calculator ➕
Instant and accurate. No sign-up required. Calculate how to evenly space increases or decreases across a knitting or crochet row. Get step-by-step instructions for shaping.
How to Use the Increase/Decrease Calculator
- You need just two numbers: your current live stitch count and your target stitch count, or equivalently the number of stitches you must add or remove. - Count the live stitches honestly off the needle rather than trusting the pattern's nominal figure, because a stray increase or a dropped stitch upstream shifts every interval downstream. - Decide the direction first: if the target is larger you are increasing (commonly used after ribbing, before a yoke, or when flaring a sleeve), and if it is smaller you are decreasing (used to draw in a crown, waist, or cuff). - Enter the current count and the number of shaping stitches, and the tool spaces them as evenly as it can across the row, returning a repeat you can read straight off the page. - Knowing your chosen stitch helps you interpret the result: increases such as M1 or KFB add a stitch, while decreases such as K2tog or SSK consume two stitches to make one. - Have your row marked or a row counter ready, since shaping rows are easy to lose track of mid-project, particularly across a long blanket or yoke round.
- The core formula divides the row into equal segments. - Interval = current stitches / number of shaping points, and any remainder is spread so some segments hold one extra stitch. - Worked example, evenly adding 6 stitches across 60: 60 / 6 = 10, so work an M1 after every 10 stitches, written as (K10, M1) six times. - An uneven case shows the remainder logic: spacing 7 increases across 60 stitches gives 60 / 7 = 8 remainder 4, so four segments are 9 stitches and three are 8, for instance (K9, M1) x4 then (K8, M1) x3, which still sums to 60 worked stitches plus 7 new ones = 67. - For decreases the bracket counts differ because K2tog eats two stitches: to remove 8 from 64, treat the row as 8 groups of 8, working (K6, K2tog) eight times, leaving 56. - The tool handles these remainders and presents the exact segment widths so you do not have to balance them by hand.
- Even spacing matters because clustered shaping shows: bunching increases produces a visible flare or pucker, while bunching decreases pulls a diagonal pull-line across otherwise smooth fabric. - Distributing the remainder symmetrically, with the longer segments pushed toward the row ends and away from a centre front, keeps the eye from catching on an off-balance jump. - A frequent mistake is counting the new stitches as part of the spacing math; always base the interval on the stitches you currently have, then let the increases or decreases land between them. - Mind the seams and round joins too: in flat knitting, keep a half-segment of plain stitches at each edge so shaping does not fall into the seam allowance, and in the round, avoid placing a shaping point exactly on the round marker where it can distort the join. - Finally, match increase and decrease pairs for mirrored shaping, such as SSK leaning left against K2tog leaning right, so symmetrical edges like raglans or necklines mirror cleanly rather than both tilting the same way.
FAQ
What is the most common increase stitch in knitting?
KFB (knit front and back) and M1 (make one) are the most common increases. KFB creates a small bar on the right side; M1 is nearly invisible. For evenly spaced increases, M1 is often preferred for its clean appearance.
What is the most common decrease stitch in knitting?
K2tog (knit two together) and SSK (slip, slip, knit) are the most common decreases. K2tog leans right; SSK leans left. For symmetrical shaping (like a neckline), use K2tog on one side and SSK on the other.
How do I evenly space increases across a row?
Divide the total stitches by the number of increases to find the interval. For example, to add 6 increases across 60 stitches: 60 ÷ 6 = 10, so work an increase every 10 stitches. Our calculator handles uneven divisions automatically.
What if the increases don't divide evenly?
When increases don't divide evenly, some intervals will be one stitch longer than others. Place the longer intervals at the beginning and end of the row for visual symmetry. Our calculator shows you exactly where to place each increase.
Can I use this calculator for crochet increases and decreases?
Yes. The spacing logic is the same for crochet. Common crochet increases are working 2 stitches into one; common decreases are sc2tog (single crochet two together) or dc2tog (double crochet two together).