iPhone 18 Pro Max vs iPhone 8

The iPhone 8 is 10.7 millimetres0.42 inches narrower and 101 grams3.56 ounces lighter than the iPhone 18 Pro Max.

The iPhone 18 Pro Max on Amazon (paid link) runs the newest iOS and offers a vast leap in battery life, but the iPhone 8 (paid link) is locked on its final update and will not get any more. You will feel the difference in daily use immediately, yet the real reason to upgrade is that the smaller phone won’t stay current. If you plan to keep your handset for years, only one of these is a sensible choice.

Paid link.

Easier one-handed: iPhone 8

Pocket: iPhone 8

Weight difference: Noticeable

iPhone 18 Pro Max
from $1,299 at launch.
Launch price, not a live Amazon price.
Check price on Amazon (paid link)
iPhone 8
from $699 at launch.
Launch price, not a live Amazon price.
Check price on Amazon Renewed (paid link)

Paid link.

TRUE SCALE · 1.3 PX/MM

Hand: US Army ANSUR II, 2012 (sex-balanced median). Pockets: The Pudding, 2018. Card: ISO/IEC 7810 ID-1.

iPhone 18 Pro Max
from $1,299 at launch.
Launch price, not a live Amazon price.
Check price on Amazon (paid link)
iPhone 8
from $699 at launch.
Launch price, not a live Amazon price.
Check price on Amazon Renewed (paid link)

Paid link.

HeightWidthDepthWeight18 Pro Max163.4 millimetres6.43 inches78.0 millimetres3.07 inches8.75 millimetres0.34 inches249 grams8.78 ounces8138.4 millimetres, 25.0 millimetres less5.45 inches, 0.98 inches less67.3 millimetres, 10.7 millimetres less2.65 inches, 0.42 inches less7.30 millimetres, 1.45 millimetres less0.29 inches, 0.06 inches less148 grams, 101 grams less5.22 ounces, 3.56 ounces less

Height: 18 Pro Max 163.4 millimetres, 8 138.4 millimetres.Height: 18 Pro Max 6.43 inches, 8 5.45 inches.Width: 18 Pro Max 78.0 millimetres, 8 67.3 millimetres.Width: 18 Pro Max 3.07 inches, 8 2.65 inches.Depth: 18 Pro Max 8.75 millimetres, 8 7.30 millimetres.Depth: 18 Pro Max 0.34 inches, 8 0.29 inches.Weight: 18 Pro Max 249 grams, 8 148 grams.Weight: 18 Pro Max 8.78 ounces, 8 5.22 ounces.

Specifications

Specifications for iPhone 18 Pro Max, iPhone 8. Differences are given against iPhone 18 Pro Max.
Specification	18 Pro Max	8

Height	163.4 millimetres6.43 inches	138.4 millimetres, 25.0 millimetres less5.45 inches, 0.98 inches less
Width	78.0 millimetres3.07 inches	67.3 millimetres, 10.7 millimetres less2.65 inches, 0.42 inches less
Depth	8.75 millimetres0.34 inches	7.30 millimetres, 1.45 millimetres less0.29 inches, 0.06 inches less
Weight	249 grams8.78 ounces	148 grams, 101 grams less5.22 ounces, 3.56 ounces less
Volume	111.5 cubic centimetres6.81 cubic inches	68.0 cubic centimetres, 43.5 cubic centimetres less4.15 cubic inches, 2.66 cubic inches less
Screen-to-body — Active display area over body area. Our own estimate, not an Apple figure.	91 percent	65 percent, 25 percent less

Display size — Screen size is always quoted in inches.	6.9 inches	4.7 inches, 2.2 inches less
Resolution	1320 × 2868	750 × 1334
Pixel density	460 pixels per inch	326 pixels per inch, 134 pixels per inch less
Cutout	Dynamic Island	None

Rear main	48MP Fusion, variable aperture f/1.48-f/4.0	12MP
Rear ultra-wide	48MP Fusion f/2.2	—
Rear telephoto	48MP Fusion 100mm (4x optical, 8x optical-quality)	—
Front camera	18MP Center Stage f/1.9	7MP

Chip	A20 Pro	A11 Bionic
Video playback — Apple's rated hours of video playback. Apple does not publish battery capacity.	45 hrs	13 hrs

Port	USB-C	Lightning
Wireless	5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem	4G LTE · Wi-Fi · Bluetooth
Water resistance	IP68 (6m for 30 min)	IP67 (1m for 30 min)

Storage	256 GB – 2 TB	64 – 256 GB
Launch price — Base configuration at launch, in US dollars.	1,299 dollars	699 dollars, 600 dollars less

Released	Sep 2026	Sep 2017
Status	Current	Legacy

Dimensions

The iPhone 8 is 25.0 mm (0.98 in) shorter, 10.7 mm (0.42 in) narrower, 1.45 mm (0.06 in) thinner and 101 g (3.56 oz) lighter than the iPhone 18 Pro Max. The iPhone 18 Pro Max measures 163.4 × 78.0 × 8.75 mm (6.43 × 3.07 × 0.34 in) and weighs 249 g (8.78 oz). The iPhone 8 measures 138.4 × 67.3 × 7.30 mm (5.45 × 2.65 × 0.29 in) and weighs 148 g (5.22 oz).

Questions about these phones

How much bigger is iPhone 18 Pro Max than iPhone 8 in height and width?

iPhone 18 Pro Max is 25 mm taller and 10.7 mm wider than iPhone 8.

How much heavier is iPhone 18 Pro Max compared to iPhone 8?

iPhone 18 Pro Max weighs 101 g more than iPhone 8.

What is the screen size difference between iPhone 18 Pro Max and iPhone 8?

iPhone 18 Pro Max has a 6.9 inch display, which is 2.2 inches larger than the 4.7 inch screen on iPhone 8.

Which phone is easier to use one-handed?

iPhone 8 is easier to use one-handed than iPhone 18 Pro Max.

Do these phones fit in a typical men's jeans pocket?

Both iPhone 18 Pro Max and iPhone 8 fit in a typical men's jeans pocket.

Is upgrading from iPhone 8 to iPhone 18 Pro Max worth it for size alone?

Whether upgrading from iPhone 8 to iPhone 18 Pro Max is worth it for size alone depends on your preference for larger devices.

iPhone 18 Pro Max vs iPhone 8

Quick answer

Specifications

Dimensions

Also compared with iPhone 18 Pro Max

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