Aspect Ratio

Input / Calculator refresh

Width ₁

Specifies the original width for calculation.

Width ₂

Set manually or derived from Height₂.

Height ₁

Specifies the original height for calculation.

Height ₂

Set manually or derived from Width₂.

Common ratios

Round results to the nearest whole number

Input the original dimensions (Width₁ and Height₁) in the left fields.
Enter either a new Width₂ or Height₂ on the right to automatically calculate the other.

Preview Info / Formula info

Sample Preview

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width_full aspect_ratio

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To resize a 1600 x 1200 photo to 400 pixels wide while keeping the aspect ratio, calculate the new height proportionally.

(original height / original width) x new width = new height

(1200 / 1600) x 400 = 300