Αριθμομηχανή Υφάσματος – Πόσα Μέτρα Ύφασμα Χρειάζομαι;

Πώς να χρησιμοποιήσετε αυτήν την αριθμομηχανή

1. Εισαγάγετε Project Type
2. Εισαγάγετε Fabric Width (inches)
3. Εισαγάγετε Custom Width (inches)
4. Εισαγάγετε Finished Length (inches)
5. Εισαγάγετε Finished Width (inches)
6. Κάντε κλικ στο κουμπί Υπολογισμός
7. Διαβάστε το αποτέλεσμα που εμφανίζεται κάτω από την αριθμομηχανή

How to Calculate Fabric Yardage

The basic fabric calculation formula is: Yards = (Finished Length + Seam Allowances) × Number of Panels ÷ 36 for fabric wide enough to accommodate your finished width in one piece.

If your finished width exceeds the fabric width, you'll need multiple widths sewn together. The formula becomes more complex:

1. Determine how many panels wide you need: ⌈(Finished Width + Seam Allowances) ÷ Fabric Width⌉
2. Multiply by length per panel (finished length + hem/seam allowances)
3. Add pattern repeat waste if applicable
4. Convert inches to yards (÷ 36)
5. Round up to nearest 1/8 yard (stores sell in 1/8 yd increments)

Common Fabric Widths Explained

Always subtract 1–2 inches from listed width for selvedge (the woven edge that can't be used). When calculating, use the usable width, not the full bolt width.

Pattern Repeat Calculations

Patterned fabric with a repeat requires extra yardage to ensure the pattern aligns across seams and panels. The pattern repeat is the distance between identical points in the pattern's repeat cycle.

Formula with pattern repeat:

Adjusted cut length = ⌈Finished Length ÷ Pattern Repeat⌉ × Pattern Repeat + Seam Allowances

Example: Curtain 84" long, 24" pattern repeat.
⌈84 ÷ 24⌉ = ⌈3.5⌉ = 4 repeats. Cut length = 4 × 24 = 96 inches (vs 84" without pattern matching).
Extra fabric needed: 96 − 84 = 12 inches per panel, or 1/3 yard extra per panel.

Large pattern repeats (12"–27") on multiple panels can add significantly to fabric requirements — one of the biggest sources of underestimation in home decorating projects.

Seam Allowances and Hems

Always add extra for seams and hems to your finished dimensions:

• Standard seam allowance: 5/8 inch (sewing), 1/4 inch (quilting)
• Hem allowances: 1–4 inches per hem depending on project
• Curtain headers: Add 4–8 inches for rod pocket or pleat header plus 4 inches bottom hem
• Quilts: Add 1/4 inch seams to all pieces; backing should be 2–4 inches larger than quilt top on all sides

The waste factor in this calculator accounts for seam allowances, hems, cutting inaccuracies, and shrinkage. For pre-washed fabric, use 10–15%. For unwashed fabric that may shrink, use 15–20%.

Pre-Washing Fabric: Should You?

Whether to pre-wash depends on the project:

• Always pre-wash for: Quilts and items that will be washed regularly; cotton fabrics (can shrink 3–5%); fabrics that bleed color
• Skip pre-washing for: Garments that will be dry-cleaned; display quilts not for use; fabric that loses special finishes when washed
• Pre-washing tip: Treat the fabric as you plan to launder the finished item. Wash in warm water, dry on medium heat. Press immediately after drying to prevent excessive wrinkling.

Cotton quilting fabric typically shrinks 2–4% in length and 1–2% in width. Pre-washing eliminates this concern and also removes sizing and chemical finishes.

Fabric Yardage for Common Projects

• Standard pillow cover (18×18"): 0.75 yard (44" fabric)
• Tablecloth (60×84"): 2.5–3 yards (60" fabric)
• Twin quilt top (60×80"): 4–6 yards total (multiple fabrics)
• Pair of curtain panels (50×84" each): 6–8 yards (54" fabric)
• Simple tote bag: 0.75–1 yard
• Child's dress: 1.5–2.5 yards
• Women's blouse: 2–2.5 yards (58" fabric)
• Chair seat cushion (18×18"): 0.75 yard

Buying Fabric: Tips and Tricks

• Buy more than you need: Always round up to the nearest 1/4 yard minimum. If dye lots differ, extra can't be matched later.
• Store fabric properly: Roll large pieces; fold smaller ones. Avoid long-term compressing at folds. Store away from light to prevent fading.
• Check for flaws: Inspect the full bolt for weaving errors, stains, or off-grain printing before cutting.
• Ask about remnants: Fabric stores often sell end-of-bolt remnants at a discount.
• Check grain: Fabric should be cut on-grain for garments to hang correctly. Check by pulling a thread horizontally to reveal the grain line.