How do I keep a 16:9 ratio?

Set the original width/height to any 16:9 pair (like 1920×1080) and this calculator will scale proportionally.

Aspect Ratio Calculator

Given an original width and height plus a new width, calculate the height needed to preserve the same aspect ratio.

Inputs

Results

Try an example

Formula

New Height = New Width × (Original Height / Original Width)

Aspect Ratio Scaling and CMYK-to-RGB Conversion Explained

How proportional image resizing works, and how CMYK print colors translate to RGB screen colors.

CSS Unit Converter

Convert between px, rem, and em CSS units.

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to text.

URL Encoder / Decoder

Encode text for safe use in a URL, or decode a URL-encoded string.

Number Base Converter

Convert a number between binary, octal, decimal, and hexadecimal.

Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates.

UUID Generator

Generate a random version 4 UUID.