What is the width of the Parthenon's stylobate in meters?

The width of the Parthenon’s stylobate is 30.9 meters.

The stylobate is the uppermost platform of the temple’s stepped base, and it is the surface on which the exterior columns stand. Measured at that level, the Parthenon is approximately 69.5 meters long and 30.9 meters wide. More detailed measurements often give the width as about 30.88 meters, which rounds to the stored answer.

The stylobate is not a perfectly flat, straight-edged rectangle. Its long and short sides rise subtly toward the centre, an optical and structural refinement that counters the visual impression of sagging in long horizontal lines. The curvature is only a few centimetres, but it continues through related elements of the entablature.

The width is also important to the Parthenon’s proportional design. Its approximate 30.9-to-69.5-meter dimensions form a ratio close to 4:9, a relationship also reflected in aspects of the column spacing and elevation. Do not confuse the stylobate’s width with the cella’s narrower interior width, which is roughly 19.2 meters.