iPhone 8 Plus vs iPhone 18 Pro Max
Quick answer
The iPhone 18 Pro Max is 1.25 millimetres0.05 inches thicker and 47 grams1.66 ounces heavier than the iPhone 8 Plus.
The iPhone 8 Plus on Amazon (paid link) has already stopped getting iOS updates, so you are stuck on an old version forever. The iPhone 18 Pro Max (paid link) runs the newest system, offers performance you will notice immediately, and carries you through days without a charger. That difference in support and endurance alone makes the upgrade the obvious pick.
Paid link.
Easier one-handed: iPhone 8 Plus
Pocket: iPhone 8 Plus
Weight difference: Noticeable
iPhone 8 Plus
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 8 Plus: 158.4 by 78.1 by 7.5 millimetres, 202 grams. iPhone 18 Pro Max: 163.4 by 78 by 8.75 millimetres, 249 grams.
8 Plus, 18 Pro Max shown at 2.1 pixels per millimetre.
iPhone 8 Plus
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: 8 Plus 158.4 millimetres, 18 Pro Max 163.4 millimetres.Height: 8 Plus 6.24 inches, 18 Pro Max 6.43 inches.Width: 8 Plus 78.1 millimetres, 18 Pro Max 78.0 millimetres.Width: 8 Plus 3.07 inches, 18 Pro Max 3.07 inches.Depth: 8 Plus 7.50 millimetres, 18 Pro Max 8.75 millimetres.Depth: 8 Plus 0.30 inches, 18 Pro Max 0.34 inches.Weight: 8 Plus 202 grams, 18 Pro Max 249 grams.Weight: 8 Plus 7.13 ounces, 18 Pro Max 8.78 ounces.
Specifications
| Specification | 8 Plus | 18 Pro Max |
|---|---|---|
| Height | 158.4 millimetres6.24 inches | 163.4 millimetres, 5.0 millimetres more6.43 inches, 0.20 inches more |
| Width | 78.1 millimetres3.07 inches | 78.0 millimetres, 0.1 millimetres less3.07 inches, the same |
| Depth | 7.50 millimetres0.30 inches | 8.75 millimetres, 1.25 millimetres more0.34 inches, 0.05 inches more |
| Weight | 202 grams7.13 ounces | 249 grams, 47 grams more8.78 ounces, 1.66 ounces more |
| Volume | 92.8 cubic centimetres5.66 cubic inches | 111.5 cubic centimetres, 18.7 cubic centimetres more6.81 cubic inches, 1.14 cubic inches more |
| Screen-to-body — Active display area over body area. Our own estimate, not an Apple figure. | 67 percent | 91 percent, 23 percent more |
| Display size — Screen size is always quoted in inches. | 5.5 inches | 6.9 inches, 1.4 inches more |
| Resolution | 1080 × 1920 | 1320 × 2868 |
| Pixel density | 401 pixels per inch | 460 pixels per inch, 59 pixels per inch more |
| Cutout | None | Dynamic Island |
| Rear main | 12MP | 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 | 7MP | 18MP Center Stage f/1.9 |
| Chip | A11 Bionic | A20 Pro |
| Video playback — Apple's rated hours of video playback. Apple does not publish battery capacity. | 14 hrs | 45 hrs |
| Port | Lightning | USB-C |
| Wireless | 4G LTE · Wi-Fi · Bluetooth | 5G · Wi-Fi 7 · Bluetooth 6 · Apple C2 modem |
| Water resistance | IP67 (1m for 30 min) | IP68 (6m for 30 min) |
| Storage | 64 – 256 GB | 256 GB – 2 TB |
| Launch price — Base configuration at launch, in US dollars. | 799 dollars | 1,299 dollars, 500 dollars more |
| Released | Sep 2017 | Sep 2026 |
| Status | Legacy | Current |
Dimensions
The iPhone 18 Pro Max is 5.0 mm (0.20 in) taller, 0.1 mm narrower, 1.25 mm (0.05 in) thicker and 47 g (1.66 oz) heavier than the iPhone 8 Plus. The iPhone 8 Plus measures 158.4 × 78.1 × 7.50 mm (6.24 × 3.07 × 0.30 in) and weighs 202 g (7.13 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 8 Plus
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Questions about these phones
How much taller is the iPhone 18 Pro Max than the iPhone 8 Plus?
The iPhone 18 Pro Max is 5.0 mm taller than the iPhone 8 Plus. It is also 1.25 mm thicker.
Is the iPhone 18 Pro Max heavier than the iPhone 8 Plus?
The iPhone 18 Pro Max weighs 47 g more than the iPhone 8 Plus. This weight difference is noticeable.
How big is the screen on the iPhone 18 Pro Max compared to the iPhone 8 Plus?
The iPhone 18 Pro Max has a 6.9 inch display, which is 1.4 inches larger than the iPhone 8 Plus screen.
Which phone is easier to use one-handed?
The iPhone 8 Plus is easier to use one-handed. It is also better for small hands.
Do these phones fit in a typical men's jeans pocket?
Both phones fit in a typical men's jeans pocket. The iPhone 8 Plus is considered more pocketable overall.
Is upgrading from the iPhone 8 Plus to the iPhone 18 Pro Max worth it for size?
Whether the size upgrade is worth it depends on your needs. The iPhone 18 Pro Max is significantly larger and heavier.