Despite rumors of an increase in thickness, the iPhone 18 Pro Max has the same physical dimensions as the iPhone 17 Pro Max. It measures 163.4mm x 78mm x 8.75mm, but it became 16 grams heavier.
Apple says the iPhone 18 Pro Max weighs 249 grams, while the iPhone 17 Pro Max weighed 233 grams, making it the heaviest non-foldable iPhone yet. It is heavier than the iPhone 14 Pro Max, which was previously Apple’s heaviest iPhone at 240 grams.
The iPhone 18 Pro weighs 211 grams, compared to 206 grams in the previous generation model. Apple may have increased the size of the battery even though the dimensions haven’t changed, or the new vapor chamber cooling system may be heavier.
There’s a larger vapor chamber in the iPhone 18 Pro models that takes up three times more surface area to dissipate more heat. The A20 Pro is capable of delivering sustained performance up to 40% higher than the A19 Pro thanks to the next-generation vapor chamber and “more thermally conductive materials.”
The 18 Pro Max battery provides up to six hours more video playback than the iPhone 17 Pro Max battery.
Even though it weighs 249 grams, the iPhone 18 Pro Max is still a bit lighter than the iPhone Duo, which weighs 254 grams. The iPhone Duo is Apple’s heaviest iPhone to date.
Cases for iPhone 17 Pro models should fit iPhone 18 Pro models as the dimensions are the same.
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