Thread Density Counter

Calculate fabric thread density (warp and weft counts per cm/inch), thread diameter, and cover factor from a thread grid count. Runs locally in your browser.

Warp threads counted

threads along the warp

Weft threads counted

threads along the weft

Count area width (mm)

width of counting window

Thread diameter (mm)

average thread diameter

Enter thread counts and window area.

Thread count per cm = threads ÷ (window_mm ÷ 10). Cover factor = (warp density × d + weft density × d) × 100, capped at 100%. Runs locally — nothing leaves your browser.