Sizometry

  • Home
  • Devices
  • Comparisons
  • Tool
  • Insights
  • Methodology

Data sources and measurement methods are explained in our Methodology.

PrivacyTermsContact

Product names, trademarks, and registered trademarks belong to their respective owners. Sizometry is an independent reference site and is not affiliated with or endorsed by the manufacturers shown.

© 2026 Sizometry. All rights reserved.

iPhone 18 vs iPhone 15

Device summary

iPhone 18

Apple

iPhone 18

Apple

iPhone 15

Full specifications

Full specifications
Basic information
Release year20262023
Starting price—$799
Display size6.3-inch6.1-inch
Dimensions71.6 mm × 147.6 mm × 7.8 mm71.6 mm × 147.6 mm × 7.8 mm
Weight170–179 g171 g
Front material—Ceramic Shield
Back material—Color-infused glass
Display
Display technology—Super Retina XDR OLED
Resolution—2556 × 1179
Refresh rate—60 Hz
Peak brightness—2000 nits
Protection—Ceramic Shield
Performance
Chipset—Apple A16 Bionic
RAM—6 GB
Storage—128 GB, 256 GB, 512 GB
Expandable storage—No
Cameras
Main camera—Main · 48 MP · ƒ/1.6 · 26 mm · Sensor-shift OIS
Ultra-wide camera—Ultra Wide · 12 MP · ƒ/2.4 · 13 mm
Front cameras—TrueDepth · 12 MP · ƒ/1.9
Video recording—4K Dolby Vision up to 60 fps, Action mode up to 2.8K at 60 fps
Battery & charging
Wired charging—20 W
Wireless charging—15 W
Charging standard—MagSafe, Qi
Battery type—Built-in rechargeable lithium-ion
Connectivity
Cellular—5G (sub-6 GHz), Gigabit LTE
Wi‑Fi—Wi‑Fi 6 (802.11ax)
Bluetooth—Bluetooth 5.3
USB—USB-C (USB 2)
NFC—Yes
eSIM—Yes
Satellite—Emergency SOS via satellite
Build & durability
Frame—Aluminum
Ingress protection—IP68

Basic information

Release year

iPhone 18
2026
iPhone 15
2023

Starting price

iPhone 18
—
iPhone 15
$799

Display size

iPhone 18
6.3-inch
iPhone 15
6.1-inch

Dimensions

iPhone 18
71.6 mm × 147.6 mm × 7.8 mm
iPhone 15
71.6 mm × 147.6 mm × 7.8 mm

Weight

iPhone 18
170–179 g
iPhone 15
171 g

Front material

iPhone 18
—
iPhone 15
Ceramic Shield

Back material

iPhone 18
—
iPhone 15
Color-infused glass

Display

Display technology

iPhone 18
—
iPhone 15
Super Retina XDR OLED

Resolution

iPhone 18
—
iPhone 15
2556 × 1179

Refresh rate

iPhone 18
—
iPhone 15
60 Hz

Peak brightness

iPhone 18
—
iPhone 15
2000 nits

Protection

iPhone 18
—
iPhone 15
Ceramic Shield

Performance

Chipset

iPhone 18
—
iPhone 15
Apple A16 Bionic

RAM

iPhone 18
—
iPhone 15
6 GB

Storage

iPhone 18
—
iPhone 15
128 GB, 256 GB, 512 GB

Expandable storage

iPhone 18
—
iPhone 15
No

Cameras

Main camera

iPhone 18
—
iPhone 15
Main · 48 MP · ƒ/1.6 · 26 mm · Sensor-shift OIS

Ultra-wide camera

iPhone 18
—
iPhone 15
Ultra Wide · 12 MP · ƒ/2.4 · 13 mm

Front cameras

iPhone 18
—
iPhone 15
TrueDepth · 12 MP · ƒ/1.9

Video recording

iPhone 18
—
iPhone 15
4K Dolby Vision up to 60 fps, Action mode up to 2.8K at 60 fps

Battery & charging

Wired charging

iPhone 18
—
iPhone 15
20 W

Wireless charging

iPhone 18
—
iPhone 15
15 W

Charging standard

iPhone 18
—
iPhone 15
MagSafe, Qi

Battery type

iPhone 18
—
iPhone 15
Built-in rechargeable lithium-ion

Connectivity

Cellular

iPhone 18
—
iPhone 15
5G (sub-6 GHz), Gigabit LTE

Wi‑Fi

iPhone 18
—
iPhone 15
Wi‑Fi 6 (802.11ax)

Bluetooth

iPhone 18
—
iPhone 15
Bluetooth 5.3

USB

iPhone 18
—
iPhone 15
USB-C (USB 2)

NFC

iPhone 18
—
iPhone 15
Yes

eSIM

iPhone 18
—
iPhone 15
Yes

Satellite

iPhone 18
—
iPhone 15
Emergency SOS via satellite

Build & durability

Frame

iPhone 18
—
iPhone 15
Aluminum

Ingress protection

iPhone 18
—
iPhone 15
IP68

Key differences

The most meaningful measured gaps in size and weight — not an overall winner.

  • Weight

    iPhone 15

    4 g lighter · minor difference

  • Height

    Very similar height

  • Width

    Very similar width

  • Thickness

    Very similar thickness

View iPhone 18 detailsView iPhone 15 details

Compare in Sizometry Tool

See both devices at the same scale.

Compare in Tool

Dimensions and weight are based on manufacturer specifications. Handling estimates are derived from physical measurements. Methodology