An iPhone 12 is 5.78 inches (146.7 mm) long, 2.82 inches (71.5 mm) wide and 0.29 inch (7.4 mm) thick, and it weighs 5.78 ounces (164 grams).
Below are those figures in inches, millimetres and centimetres, the lengths of the iPhone 12 mini, 12 Pro and 12 Pro Max, the screen sizes, and how long Apple supports the phone.
How long is an iPhone 12 in inches and cm
Apple lists the length of the phone as its height. These are Apple's published measurements for every iPhone 12, whatever the colour or storage size, although Apple notes that size and weight vary slightly by configuration and manufacturing process.
| Measurement | Inches | Millimetres | Centimetres |
|---|---|---|---|
| Length (height) | 5.78 in | 146.7 mm | 14.67 cm |
| Width | 2.82 in | 71.5 mm | 7.15 cm |
| Depth (thickness) | 0.29 in | 7.4 mm | 0.74 cm |
| Screen (diagonal) | 6.1 in | about 155 mm | about 15.5 cm |
| Weight | 5.78 oz (about 0.36 lb) | 164 g | 164 g |
So the iPhone 12 is just under 6 inches long, and its 6.1-inch screen diagonal is longer than the body itself because it runs corner to corner.
How long is iPhone 12 step by step tutorial
Four phones carry the iPhone 12 name, and two of them have different lengths. Find the exact specifications for your handset by its model number, then compare it with the other models.
- Open the Settings app and tap General.
- Tap About.
- Look at the part number to the right of Model Number, then tap it to reveal the model number that starts with A.
- Match it: A2172, A2402, A2403 or A2404 is an iPhone 12, which is 146.7 mm (5.78 in) long.
- A2176, A2398, A2399 or A2400 is an iPhone 12 mini, which is 131.5 mm (5.18 in) long.
- A2341, A2406, A2407 or A2408 is an iPhone 12 Pro, the same 146.7 mm length as the iPhone 12.
- A2342, A2410, A2411 or A2412 is an iPhone 12 Pro Max, which is 160.8 mm (6.33 in) long.
- If the screen is broken, remove the SIM tray on the left side and read the model number printed on the upper side of the slot under bright light.
A quick visual check also works: the iPhone 12 and 12 mini have two rear cameras, while the 12 Pro and 12 Pro Max have three cameras plus a LiDAR Scanner.
How long is an iPhone 12 mini, 12 Pro and 12 Pro Max
The iPhone 12 and iPhone 12 Pro share the same outline. The 12 mini is the shortest of the four and the 12 Pro Max is the longest, while all four are 7.4 mm thick.
| Model | Length x width x depth | Screen | Weight | Versus iPhone 12 |
|---|---|---|---|---|
| iPhone 12 mini | 131.5 x 64.2 x 7.4 mm (5.18 x 2.53 x 0.29 in) | 5.4 in OLED | 135 g (4.76 oz) | 15.2 mm shorter, 7.3 mm narrower, 29 g lighter |
| iPhone 12 | 146.7 x 71.5 x 7.4 mm (5.78 x 2.82 x 0.29 in) | 6.1 in OLED | 164 g (5.78 oz) | Baseline |
| iPhone 12 Pro | 146.7 x 71.5 x 7.4 mm (5.78 x 2.82 x 0.29 in) | 6.1 in OLED | 189 g (6.66 oz) | Same size, 25 g heavier |
| iPhone 12 Pro Max | 160.8 x 78.1 x 7.4 mm (6.33 x 3.07 x 0.29 in) | 6.7 in OLED | 228 g (8.03 oz) | 14.1 mm longer, 6.6 mm wider, 64 g heavier |
The weight gap between the iPhone 12 and 12 Pro comes from materials: the 12 uses an aluminum band and glass back, while the 12 Pro uses stainless steel and textured matte glass. Older and newer models are side by side in the full iPhone size chart.
How many inches is the iPhone 12 screen
Apple sells the iPhone 12 as a 6.1-inch phone. The display has rounded corners, so Apple measures it as a standard rectangle, which gives 6.06 inches diagonally, and the actual viewable area is a little less.
| Model | Advertised diagonal | Measured as a rectangle | Resolution | Pixel density |
|---|---|---|---|---|
| iPhone 12 mini | 5.4 in (about 13.7 cm) | 5.42 in | 2340 x 1080 | 476 ppi |
| iPhone 12 | 6.1 in (about 15.5 cm) | 6.06 in | 2532 x 1170 | 460 ppi |
| iPhone 12 Pro | 6.1 in (about 15.5 cm) | 6.06 in | 2532 x 1170 | 460 ppi |
| iPhone 12 Pro Max | 6.7 in (about 17.0 cm) | 6.68 in | 2778 x 1284 | 458 ppi |
Every iPhone 12 model uses a Super Retina XDR OLED panel. On the iPhone 12, Apple lists a 2,000,000:1 contrast ratio, 625 nits typical brightness and 1200 nits peak brightness for HDR content.
iPhone 12 size compared to iPhone 11 and iPhone 13
The iPhone 12 kept the 6.1-inch screen of the iPhone 11 but shrank the body around it. The iPhone 13 that followed has the same length and width as the iPhone 12 and is slightly thicker.
| Model | Length x width x depth | Weight | Versus iPhone 12 |
|---|---|---|---|
| iPhone 11 | 150.9 x 75.7 x 8.3 mm (5.94 x 2.98 x 0.33 in) | 194 g | 4.2 mm longer, 4.2 mm wider, 0.9 mm thicker, 30 g heavier |
| iPhone 12 | 146.7 x 71.5 x 7.4 mm (5.78 x 2.82 x 0.29 in) | 164 g | Baseline |
| iPhone 13 | 146.7 x 71.5 x 7.65 mm (5.78 x 2.82 x 0.30 in) | 174 g | Same length and width, 0.25 mm thicker, 10 g heavier |
| iPhone 13 mini | 131.5 x 64.2 x 7.65 mm (5.18 x 2.53 x 0.30 in) | 141 g | Same outline as the 12 mini, 0.25 mm thicker |
In the hand, the iPhone 12 feels smaller than the bigger iPhone 11 body mainly because it is 4.2 mm narrower and 30 g lighter.
Tips for understanding iPhone 12 dimensions
Spec sheets use a few conventions that trip people up when they compare phones or shop for accessories.
| Tip | What it means for the iPhone 12 |
|---|---|
| Length is listed as height | Apple's 146.7 mm height figure is the phone's length from top edge to bottom edge |
| Depth is the body thickness | All four iPhone 12 models are 7.4 mm thick |
| Screen size is a diagonal | 6.1 inches is measured corner to corner, not along the long edge |
| Rounded corners shrink the real figure | Measured as a plain rectangle, the screen is 6.06 inches |
| Storage and colour do not change the size | 64GB, 128GB and 256GB phones in any colour share one set of dimensions |
| Small variations exist | Apple states size and weight vary slightly by configuration and manufacturing process |
| Weight changes how big a phone feels | The 12 Pro has the same outline as the 12 but weighs 25 g more |
| A case adds to every figure | Measure with the case on if you need the length for a pocket, mount or holder |
Can I use my old iPhone case for the iPhone 12
Buy a case labelled for the iPhone 12. Cases for older phones are cut for different dimensions and camera layouts, and the iPhone 12 has a flat-edged band and a MagSafe magnet array on the back.
| Case or accessory | iPhone 12 compatibility |
|---|---|
| iPhone 11 case | Made for a 150.9 x 75.7 x 8.3 mm body, so it is larger and looser than the iPhone 12 |
| iPhone 12 Pro case | Same outline, but the cutout is made for three cameras and a LiDAR Scanner |
| iPhone 13 case | Made for the same length and width but a 0.25 mm thicker body, so the fit is not exact |
| iPhone 12 mini or 12 Pro Max case | Different length and width, so it does not fit |
| MagSafe chargers and accessories | Supported; MagSafe wireless charging up to 15W |
| Qi wireless chargers | Supported, up to 7.5W |
| Charging cable | Lightning connector |
| SIM | Dual SIM with nano-SIM and eSIM; micro-SIM cards are not compatible |
The dual camera on the back also sets the case cutout, so it pays to learn the iPhone 12 camera and its Main and Ultra Wide lenses before buying lens accessories.
iPhone 12 model numbers by country
The iPhone 12 is the same length everywhere it is sold. Apple publishes one set of dimensions for all four regional iPhone model numbers; only the cellular hardware differs.
| Model number | Sold in | Dimensions | Weight |
|---|---|---|---|
| A2172 | United States | 146.7 x 71.5 x 7.4 mm | 164 g |
| A2402 | Canada, Japan | 146.7 x 71.5 x 7.4 mm | 164 g |
| A2404 | China mainland, Hong Kong, Macao | 146.7 x 71.5 x 7.4 mm | 164 g |
| A2403 | Other countries and regions | 146.7 x 71.5 x 7.4 mm | 164 g |
Metric listings quote the phone as 146.7 x 71.5 x 7.4 mm, while US listings use 5.78 x 2.82 x 0.29 inches. Both describe the same handset.
How long will Apple support iPhone 12
Apple still supports every iPhone 12 model with software updates. iOS 27 lists the iPhone 12, 12 mini, 12 Pro and 12 Pro Max among its compatible devices.
| Support type | iPhone 12 status | Apple's rule |
|---|---|---|
| iOS updates | iOS 27 runs on all four iPhone 12 models | Apple publishes a compatible device list with each iOS release |
| Hardware service and parts | Available | At least 5 years from when Apple last distributed the product for sale |
| Vintage status | Not on Apple's vintage iPhone list | Vintage means Apple stopped selling it more than 5 and less than 7 years ago; service continues while parts last |
| Obsolete status | Not on Apple's obsolete iPhone list | Obsolete means more than 7 years; Apple ends all hardware service |
Check Apple's compatible device list each time a new version of iOS is announced to see whether your model is still on it.
How long does an iPhone 12 battery last
Apple rates the iPhone 12 for up to 17 hours of video playback on a full charge. Battery capacity also declines with each charge cycle, which shortens these figures over the life of the phone.
| Model | Video playback | Streamed video | Audio playback |
|---|---|---|---|
| iPhone 12 mini | Up to 15 hours | Up to 10 hours | Up to 50 hours |
| iPhone 12 | Up to 17 hours | Up to 11 hours | Up to 65 hours |
| iPhone 12 Pro | Up to 17 hours | Up to 11 hours | Up to 65 hours |
| iPhone 12 Pro Max | Up to 20 hours | Up to 12 hours | Up to 80 hours |
Apple says its lithium-ion batteries retain about 80% of their original capacity for a high number of charge cycles. To see the current state of yours, open Settings, tap Battery, then tap Battery Health & Charging.
Why does my iPhone 12 take so long to charge or update
iPhone 12 charges slowly or shows a Slow Charger message
The charger cannot deliver the power the phone supports; wired chargers of 7.5 watts or less and wireless chargers under 10 watts, such as Qi chargers, charge slower.
- Open Settings and tap Battery to check for the Slow Charger message.
- Use a 20W or higher USB-C power adapter with a Lightning cable; Apple rates this for up to 50% charge in 30 minutes.
- Use a MagSafe charger instead of a Qi pad if you charge wirelessly; MagSafe delivers up to 15W against 7.5W for Qi.
- If you charge from a computer, make sure the computer is turned on, and avoid a keyboard USB port.
- Stop syncing or using the phone while it charges, because both make charging take longer.
iPhone 12 charging slows or stops at 80%
iPhone fast charges to about 80%, then trickle charges; Optimized Battery Charging and high temperatures can also hold the level at 80%.
- Look for a Lock Screen notification about Optimized Battery Charging; touch and hold it, then tap Charge Now to charge fully.
- To change the setting, open Settings, tap Battery, tap Battery Health & Charging and turn Optimized Battery Charging on or off.
- If you see Charging On Hold, move the phone out of direct sunlight or a hot car.
- Remove the case if the phone heats up while charging.
- Charge in temperatures between 32 and 95 degrees F (0 to 35 degrees C).
iPhone 12 taking so long to update
The update downloads and installs on the phone itself; Apple offers an overnight automatic install and a computer route as alternatives.
- Back up the iPhone before you start the update.
- Open Settings, tap General, then tap Software Update and tap Download and Install.
- To let it finish unattended, tap Automatic Updates and turn on Automatically Install; the update then installs overnight while the phone is charging and on Wi-Fi.
- To update from a computer, connect the iPhone with a cable and select it in the Finder sidebar on a Mac (macOS 10.15 or later), or open iTunes on Windows.
- Click General in Finder or Summary in iTunes, click Check for Update, then click Update.
iPhone 12 dimensions FAQ
How long is an iPhone 12 in cm?
An iPhone 12 is 14.67 cm long, 7.15 cm wide and 0.74 cm thick. Apple lists these as 146.7 mm, 71.5 mm and 7.4 mm, and the 6.1-inch screen measures about 15.5 cm diagonally.
How many inches is an iPhone 12?
The iPhone 12 body is 5.78 inches long, 2.82 inches wide and 0.29 inch thick. Its screen is 6.1 inches diagonally, or 6.06 inches when measured as a standard rectangle without the rounded corners.
How long is an iPhone 12 mini?
An iPhone 12 mini is 5.18 inches (131.5 mm) long, 2.53 inches (64.2 mm) wide and 0.29 inch (7.4 mm) thick. It weighs 135 grams and has a 5.4-inch OLED screen.
How long is an iPhone 12 Pro?
An iPhone 12 Pro is 5.78 inches (146.7 mm) long, exactly the same as the iPhone 12. It is also 71.5 mm wide and 7.4 mm thick, but it weighs 189 grams because of its stainless steel band.
How long is an iPhone 12 Pro Max?
An iPhone 12 Pro Max is 6.33 inches (160.8 mm) long, 3.07 inches (78.1 mm) wide and 0.29 inch (7.4 mm) thick. It weighs 228 grams and has a 6.7-inch OLED display.
Is the iPhone 12 size the same across all its variants?
No. The iPhone 12 and 12 Pro share one outline of 146.7 x 71.5 x 7.4 mm, the 12 mini is smaller at 131.5 x 64.2 mm, and the 12 Pro Max is larger at 160.8 x 78.1 mm. Storage size and colour do not change the dimensions.
How big is my iPhone 12?
Open Settings, tap General, tap About, then tap the part number beside Model Number. A2172, A2402, A2403 or A2404 means an iPhone 12 at 146.7 mm long; other A numbers point to the mini, Pro or Pro Max.
Does the iPhone 12 feel different in hand compared to the iPhone 11?
Yes. The iPhone 12 is 4.2 mm shorter, 4.2 mm narrower, 0.9 mm thinner and 30 grams lighter than the iPhone 11, even though both have a 6.1-inch screen.
How long will the iPhone 12 be supported?
The iPhone 12 is supported today: iOS 27 lists all four iPhone 12 models as compatible. Apple offers hardware service and parts for at least 5 years after it last sells a product, and up to 7 years while parts last.
How long does an iPhone 12 last on a charge?
Apple rates the iPhone 12 for up to 17 hours of video playback, 11 hours of streamed video and 65 hours of audio playback. Real results drop as the battery ages and depend on settings and network conditions.
