Tools you might need next
Calculate glaze batch weight from unity formula and raw material analysis. Scale recipes to any batch size for consistent studio pottery glazing.
Create kiln firing schedules with ramp rates, hold times, and cone temperatures. Plan bisque and glaze firings for electric and gas pottery kilns.
Calculate clay shrinkage percentage from wet, dry, and fired dimensions. Plan pottery sizes accurately for clay bodies from leather-hard through glaze firing.
Belt size equals waist where the belt is worn (often pant size + 2 inches), measured to the center hole — not the total strap length.
Belt size (in) ≈ pant waist + 2 (typical offset)Total blank length = distance from buckle pin to center hole + tail length + buckle fold allowance. Fold allowance equals buckle prong bar width plus leather thickness.
Blank length = belt size + tail (4–6 in) + buckle fold allowanceStandard belts use 5 holes at 1 inch (25 mm) spacing centered on the measured size. Center hole aligns with the wearer's waist measurement.
Hole positions: center ± 2", ± 1" from belt size markUpdated: July 2026
34-inch belt size: blank = 34 + 5-inch tail + 2.5-inch buckle fold = 41.5 inches. Mark center hole at 34 inches from buckle pin position.
4-inch western buckle needs 4.5-inch fold allowance. Size 36 belt: blank = 36 + 6 + 4.5 = 46.5 inches of 8–9 oz strap leather.
90 cm belt (EU 46): blank = 90 + 12 cm tail + 6 cm buckle allowance = 108 cm. Holes at 2.5 cm spacing, center at 90 cm from pin.
Belt size is waist-to-center-hole distance only. A size 34 belt has a longer total blank — listing total length misleads buyers and wearers.
Thick 9 oz leather adds bulk in the fold. Add full leather thickness to buckle allowance or the effective size runs short by 2–4 mm.
Belt sizing differs from pant waist size and varies by buckle type. This calculator determines blank length from waist measurement, buckle width, leather thickness at the fold, and standard five-hole spacing.