4:3 Aspect Ratio Calculator – iPad & Presentations

Aspect Ratio Calculator

4:3

Current Aspect Ratio

Quick Select

Custom Input

Width (px)

Height (px)

Ratio Width

Ratio Height

Editing Dimensions — preview reflects exact width × height; ratio is detected from your input.

CSS

aspect-ratio: 16 / 9;

Smart Ratio Simplifier

Enter any resolution to detect its aspect ratio

CSS Code Generator

Production-ready CSS for responsive 4:3 containers:

CSS / HTML

/* Responsive aspect ratio container */
.ratio-box {
  aspect-ratio: 16 / 9;
  width: 100%;
  overflow: hidden;
}

/* With object-fit for images/video */
.ratio-box img,
.ratio-box video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

Live Visual Preview

16:9 1920 × 1080

Preview animates as you calculate

16:9 aspect ratio Landscape 1920 × 1080

For every 16 units of width, the height is 9 units. The longer side is capped at 1920px, so this ratio resolves to 1920 × 1080 — the conventional Full HD size used across most platform presets.

Why 1920 on the long side? It's the standard Full HD reference width/height used by social, video, and screen presets, which keeps Quick Select results consistent with the Platform & Device Presets below.

Platform & Device Presets

Instagram

Post (Square)

1080 × 1080

Instagram

Portrait Post

1080 × 1350

Instagram

Reel / Story

1080 × 1920

TikTok

Vertical Video

1080 × 1920

Snapchat

Story

1080 × 1920

Facebook / X

Link Preview

1200 × 630

Standard Pin

1000 × 1500

Banner

1584 × 396

YouTube

Thumbnail (HD)

1280 × 720

YouTube

1080p Video

1920 × 1080

YouTube / Netflix

4K UHD

3840 × 2160

YouTube

Shorts

1080 × 1920

Twitch

Stream

1920 × 1080

Ultrawide

UWFHD

2560 × 1080

Ultrawide

UWQHD

3440 × 1440

Desktop

Full HD

1920 × 1080

Desktop

2K / QHD

2560 × 1440

Desktop

4K UHD

3840 × 2160

iPad

iPad Retina

2048 × 1536

Ultrawide

UWFHD

2560 × 1080

Samsung

Odyssey Neo G9

5120 × 1440

iPhone 14

Screen

390 × 844

DSLR (24MP)

Full-Frame RAW

6000 × 4000

DSLR

6MP Export

3000 × 2000

4×6" @300DPI

1200 × 800

8×12" @300DPI

2400 × 1600

8×10" @300DPI

2400 × 1920

Micro 4/3

MFT Camera

3000 × 2250

Common 4:3 Resolutions

Resolution	Category	Usage

4:3 Aspect Ratio Calculator — Complete Creator Guide

The 4:3 aspect ratio was the universal standard for television, computer monitors, and photography for decades. While 16:9 widescreen has taken over video, 4:3 remains essential for presentations, iPad content, classic camera sensors, and digital photography.

From the first commercial televisions of the 1930s to the CRT monitors of the early 2000s, 4:3 was the unchallenged standard for screens. It was even standardized as the SMPTE 4:3 aspect ratio for 35mm film projected onto early TV. Though largely replaced in video by 16:9, 4:3 lives on in iPad displays, many projectors, older PowerPoint templates, and photo sensors in smaller cameras.

Common Uses

PowerPoint (older format), iPad screens, traditional TV broadcasts, medium-format photography, Zoom meeting default backgrounds, Google Meet, projectors.

Supported Platforms

Google Slides (classic) iPad Zoom Microsoft Teams Traditional webcams PowerPoint (4:3 mode)

Safe Zone Guide

Safe Zone: For presentations, keep text 5% from edges. For 1024×768, safe area is approximately 921×691 px.

Pro Creator Tip

For 4:3 presentations, use 1024×768 px or 1600×1200 px. For iPad content, target 2048×1536 px (iPad Retina). DSLR cameras often shoot in 4:3 by default in photo mode.

CSS Aspect Ratio

CSS

aspect-ratio: 4 / 3;
width: 100%;
height: auto;

Apply this CSS to any element to lock it to the 4:3 ratio. Supported in Chrome 88+, Firefox 89+, Safari 15+, and Edge 88+.

4:3 vs Other Ratios

16:9

Wider widescreen; modern standard for video and monitors. Converting from 4:3 adds letterbox bars on left/right.

3:2

Slightly wider than 4:3; standard DSLR sensor and 35mm film.

1:1

Perfect square; more compact than 4:3.

Best 4:3 Resolutions & Use Cases

Resolution	Format	Best For	Copy
640×480	VGA	Legacy webcams, older displays	Copy
800×600	SVGA	Presentations, projectors	Copy
1024×768	XGA	Classic presentations, projectors	Copy
1600×1200	UXGA	High-res 4:3 displays	Copy
2048×1536	iPad Retina	iPad (3rd gen and later)	Copy
2360×1640	iPad Air	iPad Air 10.9"	Copy

How to Use the 4:3 Calculator

Set canvas to a 4:3 resolution (e.g. 1024×768 or 2048×1536)

In PowerPoint, go to Design → Slide Size → Standard (4:3)

For webcam content, check camera settings for aspect ratio mode

Convert 16:9 video to 4:3 by adding pillarbox bars or cropping top/bottom

Frequently Asked Questions — 4:3

What resolution is 4:3?

4:3 resolutions include 640×480 (VGA), 800×600 (SVGA), 1024×768 (XGA), 1600×1200, and 2048×1536 (iPad Retina).

Do cameras still use 4:3?

Yes. Many compact cameras, smartphones, and Micro Four Thirds camera systems default to 4:3 in photo mode. DSLRs typically shoot in 3:2.

Is 4:3 good for Zoom?

Zoom uses 16:9 by default in modern versions, but legacy webcams and some settings use 4:3. Most modern video calls use 16:9. If your webcam is 4:3, Zoom will pillarbox it.

How do I convert 4:3 to 16:9?

You can either add black bars (pillarbox) on the left and right, or crop the top and bottom of the 4:3 frame to fit 16:9. Use our calculator to determine exact dimensions before cropping.

What iPad screens use 4:3?

Most iPads use a 4:3 display. The standard iPad (all generations), iPad mini, and iPad Air all use 4:3 panels at various resolutions (1024×768 up to 2360×1640).

Why did TV switch from 4:3 to 16:9?

The switch was driven by the HDTV transition in the late 1990s and 2000s. 16:9 better matches the human field of vision and the aspect ratio of theatrical films, reducing the need for letterboxing.

Explore Related Aspect Ratios

What Is an Aspect Ratio? Complete Guide for Creators in 2026

An aspect ratio is the proportional relationship between the width and height of an image, video, or display. It's expressed as two numbers separated by a colon — for example, 16:9 means the width is 16 units and the height is 9 units. The actual pixel dimensions can vary infinitely, but the proportion stays constant.

Why Aspect Ratios Matter for Content Creators

Choosing the wrong aspect ratio is one of the most common mistakes in digital content creation. Upload a 16:9 video to TikTok and it shrinks into a tiny rectangle surrounded by black bars. Post a 3:2 photo to Instagram expecting a natural crop and you'll be surprised by what gets cut. Understanding aspect ratios lets you shoot, edit, and export content that looks exactly right on every platform — and understanding how to convert between them is what separates amateur and professional output.

Platform Aspect Ratio Quick Reference

Platform	Ratio	Optimal Resolution	Use Case
YouTube	16:9	1920×1080 / 3840×2160	Videos & thumbnails
TikTok	9:16	1080×1920	Vertical video
Instagram Reels	9:16	1080×1920	Vertical video
Instagram Post	1:1 / 4:5	1080×1080 / 1080×1350	Feed posts
DSLR Camera	3:2	Varies (6000×4000 typical)	Photography
iPad	4:3	2048×1536 / 2360×1640	Tablets
Ultrawide Monitor	21:9	3440×1440	Gaming & design
Super Ultrawide	32:9	5120×1440	Samsung Odyssey

How to Calculate Aspect Ratio from Pixels

To find the aspect ratio of any resolution, divide both width and height by their Greatest Common Divisor (GCD). For 1920×1080: the GCD is 120. Divide: 1920÷120=16, 1080÷120=9. Result: 16:9. Our Smart Ratio Simplifier above does this calculation instantly for any resolution you enter.

Aspect Ratio in Responsive Web Design

Modern CSS makes it simple to lock elements to a specific aspect ratio using the aspect-ratio property. This ensures videos, images, and UI containers maintain their proportions at all screen widths. Previously developers used the "padding-top percentage hack," but the CSS aspect-ratio property (supported since 2021 in all major browsers) is the clean, modern approach.

Related Tools on FastSaveMedia

Video Cropper — Crop videos to exact aspect ratios for TikTok, Instagram, and YouTube
Social Media Resizer — Resize images to exact platform dimensions instantly
Safe Zone Checker — Preview UI overlaps on TikTok, Reels, and Shorts