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Spec guide

E-reader spec guide: what is typical

What counts as a lot, a little or typical for e-readers: medians, usual range (10th–90th percentile) and extremes of every numeric spec in the catalog.

Screen

Spec	Median	Typical range	Min – max	Models
Screen size	7″	6″ – 10″	4.7″ – 13″	151
Pixel density	300 ppi	212 ppi – 300 ppi	143 ppi – 300 ppi	146
Colour pixel density	150 ppi	150 ppi – 150 ppi	114 ppi – 265 ppi	34
Grey levels	16	16 – 16	16 – 16	71

Design

Spec	Median	Typical range	Min – max	Models
Weight	219 g	166 g – 430 g	100 g – 625 g	136
Width	134 mm	108 mm – 192 mm	75 mm – 243 mm	135
Height	174 mm	155 mm – 244 mm	122 mm – 310 mm	135
Thickness	8 mm	5.1 mm – 9 mm	4 mm – 14 mm	135
Water resistance (IPx)	IPx8	IPx8 – IPx8	IPx7 – IPx8	42

Battery

Spec	Median	Typical range	Min – max	Models
Battery capacity	2,300 mAh	1,250 mAh – 4,050 mAh	800 mAh – 6,900 mAh	106

Storage

Spec	Median	Typical range	Min – max	Models
Storage	32 GB	8 GB – 128 GB	4 GB – 256 GB	140
RAM	3 GB	0.5 GB – 6 GB	0.3 GB – 8 GB	100

Performance

Spec	Median	Typical range	Min – max	Models
CPU cores	8	8 – 8	4 – 8	30
CPU clock	1.8 GHz	1 GHz – 2.4 GHz	0.8 GHz – 2.9 GHz	61

Typical range = from the 10th to the 90th percentile of models in the catalog. Obvious data errors are excluded.