What is the rule of thirds?

The rule of thirds divides an image into nine equal sections using two horizontal and two vertical lines. Placing key elements along these lines or at their four intersections (called power points) creates more dynamic and visually pleasing compositions than centering the subject.

When should I break the rule of thirds?

Centre composition works well for symmetrical subjects, reflections and formal portraits. Dead centre can create powerful, confrontational images. Leading lines that converge to centre, radial symmetry, and minimalist compositions often benefit from centred subjects. The rule of thirds is a guideline, not a law.

Do the power points all have equal weight?

In Western cultures, the eye tends to enter an image from the top-left and scan in a Z-pattern. This makes the top-left and bottom-right power points slightly more dominant for subject placement. However, all four points create strong compositions depending on the subject and context.

How does rule of thirds apply to landscape photography?

Place the horizon on the top or bottom third line rather than the centre. If the sky is dramatic, place the horizon on the bottom third to show more sky. If the foreground is interesting, place it on the top third. Place key features like trees or buildings on vertical third lines.

PhotoCalcs

Rule of Thirds Calculator — Grid Points for Any Image

Calculate the exact pixel positions for rule of thirds grid lines and power points for any image resolution.

Image Width

Width in pixels

Image Height

Height in pixels

How We Calculate This

The rule of thirds simply divides image dimensions by three:

Grid Lines

Vertical lines at width/3 and 2*width/3

Horizontal lines at height/3 and 2*height/3

Power Points

The four intersections of these lines are the power points — the strongest positions for placing your subject or key elements. These positions create natural visual tension and balance.

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates based on standard optical and photographic formulas. Results may vary with specific equipment.