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iPhone 18 Pro Max vs iPhone 15

Quick answer

The iPhone 15 is 6.4 millimetres0.25 inches narrower and 78 grams2.75 ounces lighter than the iPhone 18 Pro Max.

The iPhone 18 Pro Max on Amazon (paid link) just arrived, and its endurance puts the renewed iPhone 15 (paid link) to shame. You will feel three generations of performance in daily tasks, and the screen refresh is noticeably smoother. This is the year to upgrade if you want longevity, but the 15 remains viable for current software at a renewal price.

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Easier one-handediPhone 15

PocketiPhone 15

Weight differenceNoticeable

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HeightWidthDepthWeight18 Pro Max163.4 millimetres6.43 inches78.0 millimetres3.07 inches8.75 millimetres0.34 inches249 grams8.78 ounces15147.6 millimetres, 15.8 millimetres less5.81 inches, 0.62 inches less71.6 millimetres, 6.4 millimetres less2.82 inches, 0.25 inches less7.80 millimetres, 0.95 millimetres less0.31 inches, 0.04 inches less171 grams, 78 grams less6.03 ounces, 2.75 ounces less

Height: 18 Pro Max 163.4 millimetres, 15 147.6 millimetres.Height: 18 Pro Max 6.43 inches, 15 5.81 inches.Width: 18 Pro Max 78.0 millimetres, 15 71.6 millimetres.Width: 18 Pro Max 3.07 inches, 15 2.82 inches.Depth: 18 Pro Max 8.75 millimetres, 15 7.80 millimetres.Depth: 18 Pro Max 0.34 inches, 15 0.31 inches.Weight: 18 Pro Max 249 grams, 15 171 grams.Weight: 18 Pro Max 8.78 ounces, 15 6.03 ounces.

Specifications

Specifications for iPhone 18 Pro Max, iPhone 15. Differences are given against iPhone 18 Pro Max.
Specification18 Pro Max15
Height163.4 millimetres6.43 inches147.6 millimetres, 15.8 millimetres less5.81 inches, 0.62 inches less
Width78.0 millimetres3.07 inches71.6 millimetres, 6.4 millimetres less2.82 inches, 0.25 inches less
Depth8.75 millimetres0.34 inches7.80 millimetres, 0.95 millimetres less0.31 inches, 0.04 inches less
Weight249 grams8.78 ounces171 grams, 78 grams less6.03 ounces, 2.75 ounces less
Volume111.5 cubic centimetres6.81 cubic inches82.4 cubic centimetres, 29.1 cubic centimetres less5.03 cubic inches, 1.78 cubic inches less
Screen-to-body — Active display area over body area. Our own estimate, not an Apple figure.91 percent87 percent, 4 percent less
Display size — Screen size is always quoted in inches.6.9 inches6.1 inches, 0.8 inches less
Resolution1320 × 28681179 × 2556
Pixel density460 pixels per inch460 pixels per inch, the same
CutoutDynamic IslandDynamic Island
Rear main48MP Fusion, variable aperture f/1.48-f/4.048MP
Rear ultra-wide48MP Fusion f/2.2—
Rear telephoto48MP Fusion 100mm (4x optical, 8x optical-quality)—
Front camera18MP Center Stage f/1.912MP
ChipA20 ProA16 Bionic
Video playback — Apple's rated hours of video playback. Apple does not publish battery capacity.45 hrs20 hrs
PortUSB-CUSB-C
Wireless5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem5G · Wi-Fi · Bluetooth
Water resistanceIP68 (6m for 30 min)IP68 (6m for 30 min)
Storage256 GB – 2 TB128 – 512 GB
Launch price — Base configuration at launch, in US dollars.1,299 dollars799 dollars, 500 dollars less
ReleasedSep 2026Sep 2023
StatusCurrentDiscontinued

Dimensions

The iPhone 15 is 15.8 mm (0.62 in) shorter, 6.4 mm (0.25 in) narrower, 0.95 mm (0.04 in) thinner and 78 g (2.75 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 measures 147.6 × 71.6 × 7.80 mm (5.81 × 2.82 × 0.31 in) and weighs 171 g (6.03 oz).

Also compared with iPhone 18 Pro Max

Questions about these phones

How much taller and wider is the iPhone 18 Pro Max than the iPhone 15?

The iPhone 18 Pro Max is 15.8 mm taller and 6.4 mm wider than the iPhone 15.

What is the weight difference between these phones?

The iPhone 18 Pro Max weighs 249 grams and the iPhone 15 weighs 171 grams, making the weight difference noticeable.

How much bigger is the screen on the iPhone 18 Pro Max?

The iPhone 18 Pro Max has a 6.9 inch display compared to the 6.1 inch display on the iPhone 15.

Which phone is easier to use one-handed?

The iPhone 15 is easier to use one-handed than the iPhone 18 Pro Max due to its smaller dimensions.

Which phone fits better in a pocket?

The iPhone 15 is more pocketable than the iPhone 18 Pro Max and fits a typical men's jeans pocket.

Is upgrading for the size change worth it?

Whether the size upgrade is worth it depends on if you prioritize battery life over portability.