Fibonacci (Golden) Logarithmic Spiral

This page generates the smooth Golden spiral (a logarithmic spiral). It is not the quarter-square "Fibonacci squares" drawing. Lines are black; white is background.

Arms

Turns

Inner radius (in)

Max radius (in)

Offset (deg)

Stroke (pt)

Manual control. Use "Recalculate stroke" for a fresh starting value. White:Black target Perceptual compensation (arms) Fit to Max radius

Canvas is 3000x3000 (~10 inches at 300 DPI). This is the Golden logarithmic spiral: b = 2*ln(phi)/pi.

Notes: This page generates the smooth Golden spiral (logarithmic). If you need the "Fibonacci squares" version made of quarter-circles through squares sized 1,1,2,3,5,..., that is a different drawing mode and can be provided on a separate page.