aspect ratio

Calculate aspect ratios.

Type a width and height to get the ratio, or pick a ratio and one dimension to compute the other.

when applying a ratio, lock:
presets
aspect ratio
16:9
decimal: 1.7778 · 1920 × 1080
16:9
AIExplain aspect ratios

Frequently asked

Is this tool free?
Yes. The aspect ratio calculator is completely free. Calculate ratios and dimensions with no limits.
Do I need to sign up?
No. Enter your dimensions or pick a preset ratio. No account required.
Is my data private?
All calculations run in your browser. No data is sent to any server.
Can I lock one dimension while changing the other?
Yes. Lock modes let you keep either the width or the height constant while the tool calculates the other dimension to match your chosen ratio. This is useful for resizing images or planning responsive layouts.