How to Schedule Successive Armhole Decreases at Different Row Intervals in Knitting
To schedule successive armhole decreases, write down the first decrease row, then add each required interval to the previous decrease row. Count every knitted row, including wrong-side rows. When the instruction changes from every second row to every fourth row, measure the new four-row interval from the last decrease already completed, unless the pattern gives a different starting point.
This guide is for knitters following armhole shaping on a garment worked flat. The task is to turn several consecutive decrease instructions into one usable row schedule, with stitch counts that help you check your work.
What does each row interval mean?
In flat knitting, a row is one pass across the stitches. Right-side (RS) and wrong-side (WS) rows both count toward the interval. With ordinary alternating RS and WS rows, decreasing every RS row means decreasing every second row. Every other RS row means every fourth row.
Use the following table after establishing a first decrease on local row 1. These numbers describe spacing; your pattern determines where that first decrease belongs.
| Instruction after the first decrease | Following decrease rows | Rows without that decrease between events |
|---|---|---|
| Every row | 2, 3, 4 | None |
| Every second row / alternate row | 3, 5, 7 | One |
| Every fourth row | 5, 9, 13 | Three |
| Every sixth row | 7, 13, 19 | Five |
A published example of changing intervals appears in Berroco’s Eastwood: its back armhole instructions establish an RS decrease row, prescribe repeats every fourth row, and then switch to repeats every RS row. This demonstrates why the interval and the number of repeats must be tracked separately. Berroco Eastwood knitting pattern
What should you record before starting the schedule?
Read the complete armhole instruction for your selected size before knitting the first shaping row. Make a short note containing the starting stitch count, any initial bind-offs, the first decrease row, each interval and repeat count, and the expected finishing stitch count.
Keep initial bind-offs separate from the subsequent decreases. In Eastwood, for example, the back begins its armhole shaping with bind-offs at the beginnings of two successive rows before the paired decrease row. A front uses a decrease at only its armhole edge. Those instructions remove different numbers of stitches per shaping event. Berroco Eastwood knitting pattern
Choose a local numbering system that is easy to follow. One practical approach is to call the first decrease row after the initial bind-offs “shaping row 1.” Mark that row in the fabric with a removable stitch marker. Keep the pattern’s garment measurements separate: resetting a counter does not change the point from which the pattern tells you to measure armhole depth.
Pay particular attention to repeat wording. An instruction to work a decrease row and repeat it three more times produces four decrease rows. An instruction specifying three times total produces three. If a pattern supplies only a compressed instruction, use its stated ending stitch count to check your interpretation before proceeding.
How do you build a schedule when the interval changes?
Consider this illustrative instruction for a back piece: work a decrease row on the next RS row; repeat it every second row three more times, then every fourth row twice, then every sixth row once. Decrease one stitch at each end on every scheduled decrease row.
For this example, assume there are 80 stitches before the initial armhole bind-offs. Bind off four stitches at the beginning of each of the next two rows, leaving 72 stitches. These are invented practice numbers, not instructions for a particular garment. Begin the local schedule on the following RS row.
The decrease rows are 1, 3, 5, 7, 11, 15, and 21. Each new number comes from adding the required interval to the preceding decrease row.
| Local shaping row | Side | Action | Stitches remaining |
|---|---|---|---|
| 1 | RS | First paired decrease | 70 |
| 3 | RS | Second-row repeat 1 of 3 | 68 |
| 5 | RS | Second-row repeat 2 of 3 | 66 |
| 7 | RS | Second-row repeat 3 of 3 | 64 |
| 11 | RS | Fourth-row repeat 1 of 2 | 62 |
| 15 | RS | Fourth-row repeat 2 of 2 | 60 |
| 21 | RS | Sixth-row repeat 1 of 1 | 58 |
Work the established stitch pattern without armhole decreases on all unlisted rows. Specifically, work row 2, row 4, row 6, rows 8–10, rows 12–14, and rows 16–20 without those decreases. Other shaping, if your actual pattern includes it, still needs its own schedule.
The first interval change occurs after row 7. Work rows 8, 9, and 10 without armhole decreases, then decrease on row 11. After the decrease on row 15, work five intervening rows before decreasing on row 21. You do not add an extra decrease merely because a new instruction group has begun.
A compact rule for your notes is: next decrease row = previous decrease row + new interval. Use this rule only when the pattern describes successive repeats. An explicit instruction such as “decrease on the next row” establishes its own timing.
How do you work both armhole edges on one decrease row?
When the instruction says to decrease one stitch at each end, make two single decreases on that scheduled row: one near the beginning and one near the end. Turning the work does not require postponing the second edge to another row.
For a stockinette practice piece with two edge stitches retained, a paired RS decrease row can be written: knit 2, knit 2 together, knit to the last 4 stitches, slip-slip-knit, knit 2. Berroco uses this arrangement for the back of Eastwood. Follow your own pattern’s placement when knitting a garment. Berroco Eastwood knitting pattern
Knit two together, abbreviated k2tog, turns two stitches into one and slopes right. Slip-slip-knit, abbreviated ssk, slopes left. For the Craft Yarn Council’s ssk method, slip two stitches individually knitwise, insert the left needle into the fronts of the slipped stitches, and knit them together. Each operation removes one stitch. Craft Yarn Council: Knitting two stitches together
If your pattern calls for decreases every row, some will fall on WS rows. Use its specified wrong-side decreases. In stockinette, purl two together produces a right-sloping decrease when viewed from the knit side, while slip-slip-purl produces a left-sloping decrease from that same view. Their appearance reverses when viewed from the purl side, so check which fabric edge you are working. Purl Soho: Purl 2 Together + Slip Slip Purl
How can stitch counts confirm the schedule?
Check the number of decrease events and the number of stitches removed independently. In the worked example, the first event plus three second-row repeats, two fourth-row repeats, and one sixth-row repeat gives seven decrease rows.
Because each scheduled row removes two stitches, the decrease section removes 7 × 2 = 14 stitches. The complete calculation is 80 − 8 initial bound-off stitches − 14 decreased stitches = 58 stitches remaining. At row 7, the intermediate count should be 64; at row 15, it should be 60.
This gives you checkpoints before the final row. If the count differs, identify the first checkpoint that does not match. Count actual stitches on the needle and compare the marked decrease rows with your written schedule before changing anything.
For a piece shaped at only one armhole edge, the same seven events would remove seven stitches. If neck shaping also occurs, account for it separately. Stitch-count arithmetic must include every instruction that changes the number of stitches.
How do you track armhole decreases alongside other instructions?
Use one continuous local row count and separate columns for each operation. If neck decreases occur during armhole shaping, enter both on the same worksheet. When both are due on one row, work both at their designated edges. Berroco’s Eastwood fronts provide an example of armhole decreases continuing while neck shaping is underway. Berroco Eastwood knitting pattern
Keep any stitch-pattern repeat on its own count. For example, local shaping row 11 may correspond to row 3 of an eight-row texture repeat. Record both numbers beside the instruction for that row. Restarting the texture repeat does not restart the armhole interval.
Tick off a scheduled row after completing the entire row. A useful note reads “row 11 completed; 62 stitches,” giving you both your position and a count to confirm when you resume.
What should you check when the schedule looks wrong?
If a schedule intended to stay on RS rows lands on a WS row, check whether you counted both sides and whether the first decrease row was numbered correctly. Adding an even interval preserves the side of the work: an RS decrease followed four rows later will also be on an RS row.
If the stitch count matches but the shaping ends later than expected, check for an extra plain row inserted at each interval change. Every fourth row has three intervening rows, not four. Also check whether “three more times” accidentally became three times total, or vice versa.
After the final decrease, return to the next instruction in the pattern. Continue without further armhole decreases only if directed, and preserve any ongoing neck or stitch-pattern instructions. A written sequence of decrease rows, paired with intermediate stitch counts, lets you complete each interval change while keeping the fabric construction consistent.