iDevice Size Calculator
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v1.0; by Nick PuntiPhone SEiPhoneiPhone PlusiPad MiniiPad / iPPiPP 10.5iPad Pro LgPossible 2017 iPad Pro screen dimensionsHi densityFor fun - 3:2 Ratio sizesPossible 2018 iPP 11"
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Screen SizeMarketing screen size numbers slightly altered to fit PPI calculation, e.g. 7.85" for 7.9" iPad MiniAlternateMy Guess
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Diagonal (in)44.75.57.99.710.512.910.1110.2310.3410.4510.5310.62510.6410.7210.8711.2510.47510.4910.4610.8611.411.0
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Ratio W16161644444444444444433333
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Ratio H99933333333333333322222
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Screen H (in)3.4864.0894.7886.2807.7608.40610.3478.0888.1848.2728.3608.4248.5008.5128.5768.6969.0008.3808.7288.7039.0369.4579.165
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Screen W (in)1.9612.3002.6934.7105.8206.3047.7606.0666.1386.2046.2706.3186.3756.3846.4326.5226.7506.2855.8195.8026.0246.3046.153
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Screen area (sq in)6.849.4112.9029.5845.1652.9980.2949.0650.2351.3252.4253.2254.1954.3455.1656.7260.7552.6750.7950.5054.4359.6256.39
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Screen ResolutionResolution calculated from (imperfect) W/H sizes; involves some small rounding
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Density (in)326326401326264264264264264264264264264264264264264326264326326264264
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Pixels H113613341920204820482224273221362160218422082224224422482264229623762732230428382946249624202420
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Pixels W6407501080153615361668204816021620163816561668168416861698172217822048153618921964166416241614
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Aspect Ratio0.56340.56220.56250.75000.75000.75000.74960.75000.75000.75000.75000.75000.75040.75000.75000.75000.75000.74960.66670.66670.66670.66670.67110.6669
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Total Pixels727,0401,000,5002,073,6003,145,7283,145,7283,709,6325,595,1363,421,8723,499,2003,577,3923,656,4483,709,6323,778,8963,790,1283,844,2723,953,7124,234,0325,595,1363,538,9445,369,4965,785,9444,153,3443,930,080
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% Increase-27.33%Baseline107.26%0%Baseline18%77.86%8.78%11.24%13.72%16.24%17.93%20.13%20.48%22.21%25.69%34.60%77.86%12.50%70.69%83.93%32.03%24.93%
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User ExperienceBased on 44pt x 44pt minimum touch targets, per iOS human interface guidelines
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Min touch target Δ0%Baseline+0.06%-19.0%Baseline0%0%BaselineBaselineBaselineBaselineBaselineBaselineBaselineBaselineBaselineBaseline-19.0%Baseline-19.0%-19.0%0.0%0.0%
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Min touch targets (W and H)0.270.270.290.270.330.330.330.330.330.330.330.330.330.330.330.330.330.270.330.270.270.330.33
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Device SizeBased on engineering diagrams from Apple Accessory Design Guidelines
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Diagonal (in)5.396.056.959.6011.5312.0114.8511.5311.5311.5311.5311.5311.5311.5311.5311.5311.5311.5311.5311.5311.53
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Aspect Ratio2.1132.0612.0311.5071.4161.4401.3861.4161.4161.4161.4161.4161.4161.4161.4161.4161.4161.4161.4161.4161.416
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Device H (in)4.875.446.238.009.409.8712.049.409.409.409.409.409.409.409.409.409.409.409.409.409.40
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Device W (in)2.312.643.075.316.676.858.696.676.676.676.676.676.676.676.676.676.676.676.676.676.6752
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Area (sq in)11.1614.2819.0442.3962.6167.53104.5462.6162.6162.6162.6162.6162.6162.6162.6162.6162.6162.6162.6162.6162.6161
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0.8524590164
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Bezel size as proportion of device38.76%34.11%32.28%30.23%27.87%21.53%23.20%14.0%12.7%11.5%10.3%9.5%8.5%8.3%7.5%6.0%2.5%10.0%9.9%10.2%6.1%
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Screen space gained from smaller bezelBaselineBaselineBaselineBaselineBaselineN/ABaseline13.86%15.20%16.40%17.57%18.41%19.39%19.54%20.35%21.83%25.42%17.84%17.99%17.68%21.74%
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Variables |
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Min iOS touch targets44pts square |
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Legend |
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Model inputs |
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Calculated data |
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Sources |
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https://developer.apple.com/accessories/Accessory-Design-Guidelines.pdfEngineering drawings of iDevices with exact glass / chamfer / corner sizes |
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https://www.paintcodeapp.com/news/ultimate-guide-to-iphone-resolutionsPhysical pixels vs Rendered pixels vs Points |
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http://www.apple.com/iphone/compare/iPhone size data |
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http://www.apple.com/ipad/compare/iPad size data |
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https://developer.apple.com/ios/human-interface-guidelines/visual-design/layout/iOS Human Interface Guidelines re touch targets |
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https://bjango.com/articles/interactiondensity/Good post on interaction density, re:touch targets being large |
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http://screen-size.infoEasy web screen size calculator if you want to run your own calculations |
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https://blog.studioneat.com/why-would-apple-release-a-10-5-ipad-ca4441f7f628#.34ose7yteArticle on 10.5" iPad resolution being 326ppi (that I disagree with)
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MetricDidn't calculate dot-pitches, just stuck with listed PPI which meant using inches; here's metric because imperial sucks
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Screen
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Screen H (mm)88.55103.87121.62159.51197.10213.50262.81205.44207.87210.11212.34213.97215.90216.20217.83220.88228.60212.85221.70221.06229.52240.20232.79
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Screen W (mm)49.8158.4368.41119.63147.83160.13197.11154.08155.91157.58159.26160.48161.93162.15163.37165.66171.45159.64147.80147.37153.01160.13156.28
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Diagonal (mm)101.60119.18139.53199.39246.38266.70328.51256.79259.84262.64265.43267.46269.88270.26272.29276.10285.75266.07266.45265.68275.84288.68280.38
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Density (mm)12.8312.8315.7912.8310.3910.3910.3910.3910.3910.3910.3910.3910.3910.3910.3910.3910.3912.8310.3912.8312.8310.3910.39
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Device
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Device H (mm)123.8138.3158.2203.2240.0250.59305.7240.0240.0240.0240.0240.0240.0240.0240.0240.0240.0240.0240.0240.0240.0258.00250.59
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Device W (mm)58.667.177.9134.8169.5174.08220.6169.5169.5169.5169.5169.5169.5169.5169.5169.5169.5169.5169.5169.5169.5178.08174.08
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Diagonal (mm)137.0153.7176.3243.8293.8305.1377.0293.8293.8293.8293.8293.8293.8293.8293.8293.8293.8293.8293.8293.8293.8313.5305.1
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User Experience
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Min touch targets (sq mm)6.866.867.276.868.478.478.478.478.478.478.478.478.478.478.478.478.476.868.476.866.868.478.47
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Other Calcs
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Resolution calc detailsResolution is calculated from (imperfect) W/H sizes; involves some small rounding
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Resolution H1136.531333.151919.992047.282048.642219.062731.532135.232160.582183.812207.042223.942244.002247.172264.062295.742376.002731.882304.252837.262945.762496.572419.55
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Resolution W639.30749.901079.991535.461536.481664.342048.651601.421620.431637.861655.281667.951683.001685.381698.051721.811782.002048.911536.161891.511963.841664.341624.33
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Point Ratio2.002.003.002.002.002.002.002.002.002.002.002.002.002.002.002.002.002.002.002.002.002.002.00
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Downsample1.001.001.151.001.001.001.001.001.001.001.001.001.001.001.001.001.001.001.001.001.001.001.00
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Corner Curve RadiusCurve is actually oval, so this is an approximation
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Device curved corners radius (mm)8
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Device curve area reduction (sq mm)54.94
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Device curve area reduction (sq in)0.09
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