The math behind each tier
A tiered skirt is a stack of rectangles, each sewn into a loop and gathered onto the one above. Four rules give every size:
- Top tier = waist × ratio, or hips + 4″ ease if that is bigger, so it pulls on
- Each lower tier = the tier above × ratio
- Cut height = finished height + seam, casing or hem allowance
- Strips = tier width ÷ (usable fabric width − 2 seam allowances), rounded up
Worked example: 30″ waist, three tiers at 1.5×
Waist 30″, hips 40″, finished length 30″, 1″ elastic in a fold-over casing, ½″ seams, 1″ hem, 44/45″ cotton (42″ usable after trimming selvages).
- Tier 1: 30 × 1.5 = 45″. Hips + ease is 44″, so 45″ pulls on.
- Tier 2: 45 × 1.5 = 67½″. Tier 3: 67½ × 1.5 = 101¼″.
- Heights: 30 ÷ 3 = 10″ finished. Cut tier 1 at 10 + 1½ casing + ½ seam = 12″, tier 2 at 11″, tier 3 at 11½″.
- Strips: a 42″ strip gives 41″ of loop, so tiers need 2, 2 and 3 strips: 2 × 23½″, 2 × 34¾″, 3 × 34¾″.
- Fabric: one strip per row, 80½″ in all. Add 5% for shrinkage and squaring up and round up to the next ⅛ yard: 2⅜ yards.
- Elastic: 30 − 2 = 28″, plus ½″ overlap: cut 28½″.
With Save fabric, tier 1 becomes a 29″ strip plus an 18″ strip, and the 18″ strip shares a row with the last strip of tier 3: 2⅛ yards. Open this example
Which fullness suits your fabric
| Ratio | Look | Fabrics |
|---|---|---|
| 1.3× | Gentle, fairly flat | Linen, chambray, quilting cotton; 5–6 tiers |
| 1.5× | Classic boho | Most wovens, 2–4 tiers |
| 2× | Full and swishy | Voile, lawn, double gauze, rayon challis |
| 2.5–3× | Frilly | Narrow hem ruffles in light fabric |
You can mix ratios. Make It & Love It uses 1.5×, 2×, 2.7×, 3.6× and 4.8× the waist so the hem doesn't get huge; choose Custom under Fullness to copy that.
Gathering a long tier
Five steps, from loop to pressed seam
- Sew each tier's strips into a loop, right sides together, and finish the seams.
- Sew two rows of long basting stitches inside the seam allowance at the top of the lower tier. Stop and restart at each seam so the threads are shorter.
- Mark quarters on both tiers and pin them right sides together, matching the marks.
- Pull the bobbin threads to gather each quarter to fit, even out the gathers and stitch just below the lower basting row.
- Remove any basting that shows, finish the seam and press it toward the waist.
For very long bottom tiers, zigzag over dental floss or crochet cotton and pull that instead.
Questions sewists ask
How much fabric do I need for a tiered maxi skirt?
An adult three-tier maxi (38″ long, 40″ hips, 1.5× fullness) needs about 3 yards of 44/45″ fabric, or 2⅛ yards of 58/60″. A fourth tier adds roughly half a yard. Enter your own numbers above for an exact cut list.
How wide should each tier of a tiered skirt be?
Make the top tier the larger of waist × ratio or hips + ease, so it pulls on over your hips. Multiply each lower tier by your ratio: with a 45″ top tier at 1.5×, the next tiers are 67½″ and 101¼″. These are finished sizes. Seam allowances for every joining seam are added on top.
How many tiers should a tiered skirt have?
Two or three tiers suit knee to midi length. Three or four suit a maxi. Each extra tier multiplies the width again, so five or six tiers need a lot of fabric and long gathering seams. For many tiers, use a lower ratio such as 1.3×.
Should I use a 1.5 or 2 gathering ratio?
1.5× is the classic soft tiered look and keeps fabric use sensible. 2× is much fuller, but the bottom tier grows fast: three tiers from a 30″ waist come to 60″, 120″ and 240″. Light fabrics such as voile and gauze handle 2× well. Mid-weight cotton looks best at 1.5× or less.
How long should the elastic be for a gathered skirt?
Most tutorials cut elastic 1–2″ (3–5 cm) shorter than your waist, plus about ½″ (1 cm) to overlap and stitch the ends. The default here is waist − 2″ plus ½″, and you can change it under More options. Wrap the elastic around your waist before cutting, because elastics stretch differently.
How do I calculate fabric for a simple gathered skirt?
Choose 1 tier. The skirt is one rectangle: width = waist × ratio (at least hips + ease), height = finished length + casing allowance + hem allowance. If the width is more than your fabric's usable width, cut two or more panels. Each extra panel adds a seam and two seam allowances.
How tall should each tier be?
Equal tiers are simplest. Tiers that get taller toward the hem (the Shorter → longer option, in 20% steps) often look more balanced on a maxi. Tiers under about 3″ (8 cm) look ruffly and are fiddly to gather. Use Custom to enter exact heights.
Why are the strips equal widths instead of full fabric width?
Equal strips put the seams evenly around the skirt, which most sewists prefer. Save fabric cuts a tier as unequal strips (say 29″ + 18″) only when that lets a short strip share a row and saves fabric. It never cuts a narrow stub, but the seams no longer sit evenly. Pick it under Fabric if you would rather use less fabric.
Defaults: 4″ (10 cm) hip ease, 2″ (5 cm) selvage trim, 5% extra length, rounded up to ⅛ yd or 10 cm. The tier math follows free tutorials from WeAllSew (BERNINA), Make It & Love It, Made Everyday and Heather Handmade.