iPhone 15 vs iPhone 18 Pro Max
Quick answer
The iPhone 18 Pro Max is 6.4 millimetres0.25 inches wider and 78 grams2.75 ounces heavier than the iPhone 15.
The iPhone 18 Pro Max on Amazon (paid link) delivers flagship speed and endurance you won't find elsewhere, but it costs nearly $1,300 new while the iPhone 15 (paid link) sits at a few hundred dollars renewed. If you prioritize battery life and a massive display, the Pro Max wins, though the 15 still gets the latest software.
Paid link.
Easier one-handed: iPhone 15
Pocket: iPhone 15
Weight difference: Noticeable
iPhone 15
from $799 at launch.
Launch price, not a live Amazon price.
Check price on Amazon Renewed (paid link)iPhone 18 Pro Max
from $1,299 at launch.
Launch price, not a live Amazon price.
Check price on Amazon (paid link)
Paid link.
TRUE SCALE · 1.3 PX/MM
TRUE SCALE · 2.1 PX/MM
Hand: US Army ANSUR II, 2012 (sex-balanced median). Pockets: The Pudding, 2018. Card: ISO/IEC 7810 ID-1.
iPhone 15: 147.6 by 71.6 by 7.8 millimetres, 171 grams. iPhone 18 Pro Max: 163.4 by 78 by 8.75 millimetres, 249 grams.
15, 18 Pro Max shown at 2.1 pixels per millimetre.
iPhone 15
from $799 at launch.
Launch price, not a live Amazon price.
Check price on Amazon Renewed (paid link)iPhone 18 Pro Max
from $1,299 at launch.
Launch price, not a live Amazon price.
Check price on Amazon (paid link)
Paid link.
Height: 15 147.6 millimetres, 18 Pro Max 163.4 millimetres.Height: 15 5.81 inches, 18 Pro Max 6.43 inches.Width: 15 71.6 millimetres, 18 Pro Max 78.0 millimetres.Width: 15 2.82 inches, 18 Pro Max 3.07 inches.Depth: 15 7.80 millimetres, 18 Pro Max 8.75 millimetres.Depth: 15 0.31 inches, 18 Pro Max 0.34 inches.Weight: 15 171 grams, 18 Pro Max 249 grams.Weight: 15 6.03 ounces, 18 Pro Max 8.78 ounces.
Specifications
| Specification | 15 | 18 Pro Max |
|---|---|---|
| Height | 147.6 millimetres5.81 inches | 163.4 millimetres, 15.8 millimetres more6.43 inches, 0.62 inches more |
| Width | 71.6 millimetres2.82 inches | 78.0 millimetres, 6.4 millimetres more3.07 inches, 0.25 inches more |
| Depth | 7.80 millimetres0.31 inches | 8.75 millimetres, 0.95 millimetres more0.34 inches, 0.04 inches more |
| Weight | 171 grams6.03 ounces | 249 grams, 78 grams more8.78 ounces, 2.75 ounces more |
| Volume | 82.4 cubic centimetres5.03 cubic inches | 111.5 cubic centimetres, 29.1 cubic centimetres more6.81 cubic inches, 1.78 cubic inches more |
| Screen-to-body — Active display area over body area. Our own estimate, not an Apple figure. | 87 percent | 91 percent, 4 percent more |
| Display size — Screen size is always quoted in inches. | 6.1 inches | 6.9 inches, 0.8 inches more |
| Resolution | 1179 × 2556 | 1320 × 2868 |
| Pixel density | 460 pixels per inch | 460 pixels per inch, the same |
| Cutout | Dynamic Island | Dynamic Island |
| Rear main | 48MP | 48MP Fusion, variable aperture f/1.48-f/4.0 |
| Rear ultra-wide | — | 48MP Fusion f/2.2 |
| Rear telephoto | — | 48MP Fusion 100mm (4x optical, 8x optical-quality) |
| Front camera | 12MP | 18MP Center Stage f/1.9 |
| Chip | A16 Bionic | A20 Pro |
| Video playback — Apple's rated hours of video playback. Apple does not publish battery capacity. | 20 hrs | 45 hrs |
| Port | USB-C | USB-C |
| Wireless | 5G · Wi-Fi · Bluetooth | 5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem |
| Water resistance | IP68 (6m for 30 min) | IP68 (6m for 30 min) |
| Storage | 128 – 512 GB | 256 GB – 2 TB |
| Launch price — Base configuration at launch, in US dollars. | 799 dollars | 1,299 dollars, 500 dollars more |
| Released | Sep 2023 | Sep 2026 |
| Status | Discontinued | Current |
Dimensions
The iPhone 18 Pro Max is 15.8 mm (0.62 in) taller, 6.4 mm (0.25 in) wider, 0.95 mm (0.04 in) thicker and 78 g (2.75 oz) heavier than the iPhone 15. 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). 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).
Also compared with iPhone 15
Questions about these phones
How much bigger 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.
How much heavier is the iPhone 18 Pro Max?
The iPhone 18 Pro Max weighs 78 grams more than the iPhone 15.
What is the screen size difference between these phones?
The iPhone 18 Pro Max has a 6.9 inch display and the iPhone 15 has a 6.1 inch display.
Which phone is easier to use one-handed?
The iPhone 15 is easier to use one-handed than the iPhone 18 Pro Max.
Do these phones fit in a typical men's jeans pocket?
Both the iPhone 15 and iPhone 18 Pro Max fit in a typical men's jeans pocket.
Is the iPhone 18 Pro Max worth the upgrade for size alone?
Whether the iPhone 18 Pro Max is worth the upgrade over the iPhone 15 depends on your needs for battery and screen size.