How do you calculate the missing dimension from an aspect ratio?

Given aspect ratio W:H, new Height = New Width × (H / W), and new Width = New Height × (W / H).

📐 Image, Screen & Video Dimension Scaler

Aspect Ratio & Resolution Calculator

Calculate proportional image widths, heights, simplified aspect ratios, megapixels, and video resolutions (16:9, 4:3, 9:16, 21:9).

Standard Ratio Preset:

Ratio Width (W):

Ratio Height (H):

Width (Pixels):

Height (Pixels):

Standard Resolutions:

720p HD (1280 × 720) 1080p Full HD (1920 × 1080) 1440p 2K (2560 × 1440) 4K UHD (3840 × 2160) TikTok 9:16 (1080 × 1920)

Aspect Ratio

16 : 9

1.778 : 1 ratio

Total Pixels

2,073,600

Resolution density

Megapixels (MP)

2.07 MP

Sensor resolution

Orientation

Landscape

Horizontal format

16:9 (1.78:1): The universal standard for television, computer monitors, YouTube, and digital broadcast.
9:16 (0.56:1): Vertical mobile video standard for TikTok, Instagram Reels, and YouTube Shorts.
21:9 (2.33:1): Anamorphic widescreen and ultrawide cinema gaming monitors.
1:1 (1.00:1): Square image format standard on social media feeds and album covers.