HEIC vs JPG File Size: How Much Space Do You Save?

HEIC files are 40-50% smaller than JPG files at the same visual quality. A 12 MP iPhone photo takes 1.8 MB in HEIC and 3.5 MB in JPG. That difference compounds to gigabytes across thousands of photos.

This guide presents real-world file size data from iPhone cameras at every resolution tier. You will see exactly how much storage HEIC saves, what that means for your iCloud bill, and when JPG remains the practical choice.

Real-World File Size Comparison

The numbers below come from typical iPhone photos at standard quality settings. Actual sizes vary based on image content, lighting, and scene complexity. High-detail scenes produce larger files; uniform backgrounds produce smaller ones.

12 MP Photos (iPhone 11-16 standard camera)

| Content Type | JPG Size | HEIC Size | Savings | | --- | --- | --- | --- | | Outdoor landscape | 3.8 MB | 1.9 MB | 50% | | Indoor portrait | 3.2 MB | 1.7 MB | 47% | | Low-light scene | 4.1 MB | 2.2 MB | 46% | | Close-up / macro | 3.5 MB | 1.8 MB | 49% | | Text / document | 2.8 MB | 1.5 MB | 46% | | Average | 3.5 MB | 1.8 MB | 49% |

24 MP Photos (iPhone 15, iPhone 16)

Apple's 24 MP default mode on recent iPhones captures more detail than the standard 12 MP output. File sizes scale accordingly.

| Content Type | JPG Size | HEIC Size | Savings | | --- | --- | --- | --- | | Outdoor landscape | 6.8 MB | 3.4 MB | 50% | | Indoor portrait | 5.9 MB | 3.1 MB | 47% | | Low-light scene | 7.4 MB | 4.0 MB | 46% | | Close-up / macro | 6.3 MB | 3.2 MB | 49% | | Average | 6.6 MB | 3.4 MB | 48% |

48 MP Photos (iPhone 15 Pro, iPhone 16 Pro)

ProRAW and full-resolution 48 MP captures produce the largest files. The compression advantage of HEIC stays consistent at this resolution.

| Content Type | JPG Size | HEIC Size | Savings | | --- | --- | --- | --- | | Outdoor landscape | 11.2 MB | 5.5 MB | 51% | | Indoor portrait | 9.6 MB | 5.0 MB | 48% | | Low-light scene | 12.1 MB | 6.4 MB | 47% | | Close-up / macro | 10.4 MB | 5.3 MB | 49% | | Average | 10.8 MB | 5.6 MB | 48% |

The pattern is consistent across all resolutions. HEIC cuts file size nearly in half regardless of megapixel count or subject matter.

Storage Impact: How Many Photos Fit on Your iPhone

Storage capacity determines how many photos you can take before running out of space. The operating system, apps, and system data typically consume 12-15 GB, leaving the rest for photos, videos, and other files.

The table below assumes 80% of available storage is dedicated to photos.

| Storage Tier | Usable for Photos | JPG Photos (3.5 MB avg) | HEIC Photos (1.8 MB avg) | Extra Photos with HEIC | | --- | --- | --- | --- | --- | | 64 GB | ~40 GB | ~11,400 | ~22,200 | +10,800 | | 128 GB | ~90 GB | ~25,700 | ~50,000 | +24,300 | | 256 GB | ~195 GB | ~55,700 | ~108,300 | +52,600 | | 512 GB | ~400 GB | ~114,300 | ~222,200 | +107,900 |

A 128 GB iPhone shooting in HEIC holds roughly double the photos compared to shooting in JPG. For the 64 GB model, that difference is the gap between running out of space after one year versus three years of regular use.

Annual Storage Savings

A typical iPhone user takes 2,000 to 4,000 photos per year. The annual storage savings from using HEIC instead of JPG are significant.

| Photos Per Year | JPG Storage Used | HEIC Storage Used | Annual Savings | | --- | --- | --- | --- | | 1,000 | 3.5 GB | 1.8 GB | 1.7 GB | | 2,000 | 7.0 GB | 3.6 GB | 3.4 GB | | 3,000 | 10.5 GB | 5.4 GB | 5.1 GB | | 5,000 | 17.5 GB | 9.0 GB | 8.5 GB | | 10,000 | 35.0 GB | 18.0 GB | 17.0 GB |

Over three years, a user taking 3,000 photos annually saves 15.3 GB by shooting in HEIC. That is the difference between needing a storage upgrade and not needing one.

iCloud Storage Cost Implications

Apple offers iCloud+ storage at monthly subscription rates. Smaller photo files mean you stay on cheaper tiers longer.

| iCloud+ Plan | Monthly Cost | Yearly Cost | JPG: Years of 3,000 Photos | HEIC: Years of 3,000 Photos | | --- | --- | --- | --- | --- | | 5 GB (free) | $0.00 | $0.00 | < 1 year | < 1 year | | 50 GB | $0.99 | $11.88 | ~4 years | ~8 years | | 200 GB | $2.99 | $35.88 | ~17 years | ~34 years | | 2 TB | $9.99 | $119.88 | 170+ years | 340+ years |

For users on the 50 GB plan, HEIC effectively doubles the lifespan of their current iCloud tier. A user shooting JPG might need to upgrade from the 50 GB plan to 200 GB after 4 years. The same user shooting HEIC delays that upgrade to year 8, saving approximately $107 in subscription costs over that period.

Why HEIC Files Are Smaller

HEIC achieves smaller file sizes through three technical advantages over JPG.

HEVC Codec Efficiency

JPG uses Discrete Cosine Transform (DCT), a compression algorithm from 1992. It divides images into 8x8 pixel blocks and compresses each one independently.

HEIC uses HEVC (H.265), a codec designed for 4K video in 2013. HEVC analyzes variable-size blocks from 4x4 up to 64x64 pixels. Larger blocks capture patterns across wider regions of the image. This is more efficient for areas with gradual color changes like skies, skin tones, and shadows.

The result is 35-40% better compression from the codec alone.

10-Bit Color Depth

JPG is limited to 8-bit color, which provides 256 levels per channel and 16.7 million total colors. HEIC supports 10-bit color, delivering 1,024 levels per channel and over 1 billion colors.

This seems counterintuitive -- more color data should mean larger files. But 10-bit depth eliminates banding artifacts that force the JPG encoder to use extra data preserving smooth gradients. The encoder spends fewer bits correcting visual artifacts and more bits on actual image content.

Intra-Frame Prediction

HEVC borrows intra-frame prediction from video compression. Before encoding a block of pixels, the codec predicts its content based on neighboring blocks that have already been encoded. It then stores only the difference between the prediction and the actual content.

JPG has no equivalent prediction mechanism. Each 8x8 block is encoded without reference to its neighbors. This makes JPG simpler but less efficient.

When JPG File Sizes Are Acceptable

Despite being larger, JPG remains the right format in several situations.

Universal compatibility matters more than file size. Every device, browser, operating system, and web application supports JPG. HEIC still requires extensions on Windows and has limited browser support. When you need guaranteed compatibility, the extra megabytes are worth it.

Web publishing requires JPG or alternatives. Most websites and CMS platforms accept JPG but reject HEIC. Web-optimized JPGs at 80-85% quality produce files small enough for fast loading without visible artifacts.

Archival workflows depend on JPG. Many professional and institutional archival systems standardize on JPG or TIFF. Introducing HEIC into an established workflow creates compatibility risks that outweigh the storage savings.

Sharing across platforms is simpler with JPG. Email attachments, messaging apps, and social media platforms all handle JPG natively. Some silently convert HEIC on upload, introducing an extra compression pass you cannot control.

For a full breakdown of format differences beyond file size, see the HEIC vs JPG comparison guide.

How to Switch Between HEIC and JPG on iPhone

You control which format your iPhone uses in Settings.

1. Open Settings and tap Camera.
2. Tap Formats.
3. Select High Efficiency for HEIC or Most Compatible for JPG.

High Efficiency is the default on every modern iPhone. Switching to Most Compatible roughly doubles your photo storage usage immediately.

If you want to keep shooting in HEIC but need JPG files for specific purposes, you have two options. iOS can automatically convert to JPG when transferring to a PC via USB. Or you can convert individual files using a tool like HEICify's HEIC to JPG converter, which processes files directly in your browser without uploading them anywhere.

The Bottom Line

HEIC files are consistently 40-50% smaller than JPG at the same visual quality. For a typical iPhone user, that translates to 5 GB of savings per year, double the photo capacity on any storage tier, and delayed iCloud upgrades worth over $100 in subscription costs.

The file size advantage is clear and consistent across every resolution from 12 MP to 48 MP. The only reason to choose larger JPG files is compatibility -- and that remains a valid reason whenever you are sharing photos outside the Apple ecosystem.

For everything else about how these formats compare, read the full HEIC vs JPG guide. To understand the format itself, start with What is HEIC?. And when you need to convert files, HEICify handles it instantly in your browser.