Rule of Thirds Calculator
Rule of Thirds Grid
Calculate grid positions for any image size
Phi Grid (Golden Ratio)
Calculate composition grid using the golden ratio instead of thirds
Formula
Third Lines: width/3, 2×width/3, height/3, 2×height/3 | Phi Lines: width/(1+phi), width×phi/(1+phi)
Frequently Asked Questions
What is the rule of thirds?
The rule of thirds divides an image into a 3x3 grid. Placing key elements along the lines or at their intersections (power points) creates more balanced and engaging compositions than centering the subject.
What are power points in composition?
Power points are the four intersections where the rule of thirds grid lines cross. These are the strongest positions to place your main subject, as the eye naturally gravitates to these points.
What is the phi grid?
The phi grid is similar to the rule of thirds but uses the golden ratio (1.618) to position the lines. The lines are closer to the center, creating a tighter composition that some photographers prefer for portraits.
You may also need
~
Golden Ratio Calculator
Free golden ratio calculator. Calculate golden ratio proportions, golden rectangle dimensions, and Fibonacci-based design measurements.
Everyday~
Design Grid Calculator
Free design grid calculator. Calculate column widths, gutters, and margins for responsive web layouts and print design grids.
Everyday~
Canvas Size Calculator
Free canvas size calculator. Calculate art canvas dimensions, area, and proportions for painting, drawing, and digital art projects.
Everyday