iPhone 18 Pro Max vs iPhone 15 Plus

The iPhone 15 Plus is 0.95 millimetres0.04 inches thinner and 48 grams1.69 ounces lighter than the iPhone 18 Pro Max.

The iPhone 18 Pro Max on Amazon (paid link) is brand new with endurance that carries you through heavy days, whereas the iPhone 15 Plus (paid link) is a discontinued model available only as renewed stock at a lower price. You will notice the heft difference, but the newer silicon and battery make the upgrade clear if you want reliability. Go with the 18 Pro Max for performance or the 15 Plus for value.

Paid link.

Easier one-handed: iPhone 15 Plus

Pocket: iPhone 15 Plus

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 15 Plus
from $899 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 15 Plus
from $899 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 ounces15 Plus160.9 millimetres, 2.5 millimetres less6.33 inches, 0.10 inches less77.8 millimetres, 0.2 millimetres less3.06 inches, 0.01 inches less7.80 millimetres, 0.95 millimetres less0.31 inches, 0.04 inches less201 grams, 48 grams less7.09 ounces, 1.69 ounces less

Height: 18 Pro Max 163.4 millimetres, 15 Plus 160.9 millimetres.Height: 18 Pro Max 6.43 inches, 15 Plus 6.33 inches.Width: 18 Pro Max 78.0 millimetres, 15 Plus 77.8 millimetres.Width: 18 Pro Max 3.07 inches, 15 Plus 3.06 inches.Depth: 18 Pro Max 8.75 millimetres, 15 Plus 7.80 millimetres.Depth: 18 Pro Max 0.34 inches, 15 Plus 0.31 inches.Weight: 18 Pro Max 249 grams, 15 Plus 201 grams.Weight: 18 Pro Max 8.78 ounces, 15 Plus 7.09 ounces.

Specifications

Specifications for iPhone 18 Pro Max, iPhone 15 Plus. Differences are given against iPhone 18 Pro Max.
Specification	18 Pro Max	15 Plus

Height	163.4 millimetres6.43 inches	160.9 millimetres, 2.5 millimetres less6.33 inches, 0.10 inches less
Width	78.0 millimetres3.07 inches	77.8 millimetres, 0.2 millimetres less3.06 inches, 0.01 inches less
Depth	8.75 millimetres0.34 inches	7.80 millimetres, 0.95 millimetres less0.31 inches, 0.04 inches less
Weight	249 grams8.78 ounces	201 grams, 48 grams less7.09 ounces, 1.69 ounces less
Volume	111.5 cubic centimetres6.81 cubic inches	97.6 cubic centimetres, 13.9 cubic centimetres less5.96 cubic inches, 0.85 cubic inches less
Screen-to-body — Active display area over body area. Our own estimate, not an Apple figure.	91 percent	88 percent, 3 percent less

Display size — Screen size is always quoted in inches.	6.9 inches	6.7 inches, 0.2 inches less
Resolution	1320 × 2868	1290 × 2796
Pixel density	460 pixels per inch	460 pixels per inch, the same
Cutout	Dynamic Island	Dynamic Island

Rear main	48MP Fusion, variable aperture f/1.48-f/4.0	48MP
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	12MP

Chip	A20 Pro	A16 Bionic
Video playback — Apple's rated hours of video playback. Apple does not publish battery capacity.	45 hrs	26 hrs

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

Storage	256 GB – 2 TB	128 – 512 GB
Launch price — Base configuration at launch, in US dollars.	1,299 dollars	899 dollars, 400 dollars less

Released	Sep 2026	Sep 2023
Status	Current	Discontinued

Dimensions

The iPhone 15 Plus is 2.5 mm (0.10 in) shorter, 0.2 mm (0.01 in) narrower, 0.95 mm (0.04 in) thinner and 48 g (1.69 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 15 Plus measures 160.9 × 77.8 × 7.80 mm (6.33 × 3.06 × 0.31 in) and weighs 201 g (7.09 oz).

Questions about these phones

How much bigger is iPhone 18 Pro Max than iPhone 15 Plus?

iPhone 18 Pro Max is 2.5 mm taller, 0.2 mm wider, and 0.95 mm deeper than iPhone 15 Plus.

How much heavier is iPhone 18 Pro Max compared to iPhone 15 Plus?

iPhone 18 Pro Max weighs 48 grams more than iPhone 15 Plus.

Which phone has a larger screen between iPhone 18 Pro Max and iPhone 15 Plus?

iPhone 18 Pro Max has a 6.9 inch display while iPhone 15 Plus has a 6.7 inch display.

Is iPhone 18 Pro Max easier to use one handed than iPhone 15 Plus?

No, iPhone 15 Plus is easier to use one handed.

Do both iPhone 18 Pro Max and iPhone 15 Plus fit in a typical men's jeans pocket?

Both phones fit in a typical men's jeans pocket, but iPhone 15 Plus is considered more pocketable.

Is upgrading from iPhone 15 Plus to iPhone 18 Pro Max worth it for size alone?

The verdict states that whether a size only upgrade is worth it depends on the user.

iPhone 18 Pro Max vs iPhone 15 Plus

Quick answer

Specifications

Dimensions

Also compared with iPhone 18 Pro Max

Questions about these phones