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Viewport units: vw, vh, vmin, vmax

Length units representing a percentage of the current viewport dimensions: width (vw), height (vh), the smaller of the two (vmin), or the larger of the two (vmax).

Spec	https://www.w3.org/TR/css3-values/#viewport-relative-lengths
Status	W3C Candidate Recommendation

IE	Edge	Firefox	Chrome	Safari	Opera
		147	144
		146	143	TP
		145	142	26.1
11 ⁽²⁾	141	144	141	26.0	122
10 ⁽²⁾	140	143	140	18.5-18.6	121
9 ⁽¹⁾	139	142	139	18.4	120
8	138	141	138	18.3	119
Show all
7	137	140	137	18.2	118
6	136	139	136	18.1	117
5.5	135	138	135	18.0	116
	134	137	134	17.6	115
	133	136	133	17.5	114
	132	135	132	17.4	113
	131	134	131	17.3	112
	130	133	130	17.2	111
	129	132	129	17.1	110
	128	131	128	17.0	109
	127	130	127	16.6	108
	126	129	126	16.5	107
	125	128	125	16.4	106
	124	127	124	16.3	105
	123	126	123	16.2	104
	122	125	122	16.1	103
	121	124	121	16.0	102
	120	123	120	15.6	101
	119	122	119	15.5	100
	118	121	118	15.4	99
	117	120	117	15.2-15.3	98
	116	119	116	15.1	97
	115	118	115	15	96
	114	117	114	14.1	95
	113	116	113	14	94
	112	115	112	13.1	93
	111	114	111	13	92
	110	113	110	12.1	91
	109	112	109	12	90
	108	111	108	11.1	89
	107	110	107	11	88
	106	109	106	10.1	87
	105	108	105	10	86
	104	107	104	9.1	85
	103	106	103	9	84
	102	105	102	8	83
	101	104	101	7.1	82
	100	103	100	7	81
	99	102	99	6.1	80
	98	101	98	6 ⁽²⁾	79
	97	100	97	5.1	78
	96	99	96	5	77
	95	98	95	4	76
	94	97	94	3.2	75
	93	96	93	3.1	74
	92	95	92		73
	91	94	91		72
	90	93	90		71
	89	92	89		70
	88	91	88		69
	87	90	87		68
	86	89	86		67
	85	88	85		66
	84	87	84		65
	83	86	83		64
	81	85	81		63
	80	84	80		62
	79	83	79		60
	18	82	78		58
	17	81	77		57
	16	80	76		56
	15 ⁽²⁾	79	75		55
	14 ⁽²⁾	78	74		54
	13 ⁽²⁾	77	73		53
	12 ⁽²⁾	76	72		52
		75	71		51
		74	70		50
		73	69		49
		72	68		48
		71	67		47
		70	66		46
		69	65		45
		68	64		44
		67	63		43
		66	62		42
		65	61		41
		64	60		40
		63	59		39
		62	58		38
		61	57		37
		60	56		36
		59	55		35
		58	54		34
		57	53		33
		56	52		32
		55	51		31
		54	50		30
		53	49		29
		52	48		28
		51	47		27
		50	46		26
		49	45		25
		48	44		24
		47	43		23
		46	42		22
		45	41		21
		44	40		20
		43	39		19
		42	38		18
		41	37		17
		40	36		16
		39	35		15
		38	34		12.1
		37	33		12
		36	32		11.6
		35	31		11.5
		34	30		11.1
		33	29		11
		32	28		10.6
		31	27		10.5
		30	26		10.0-10.1
		29	25 ⁽²⁾		9.5-9.6
		28	24 ⁽²⁾		9
		27	23 ⁽²⁾
		26	22 ⁽²⁾
		25	21 ⁽²⁾
		24	20 ⁽²⁾
		23	19
		22	18
		21	17
		20	16
		19	15
		18	14
		17	13
		16	12
		15	11
		14	10
		13	9
		12	8
		11	7
		10	6
		9	5
		8	4
		7
		6
		5
		4
		3.6
		3.5
		3
		2

Safari on iOS	Opera Mini	Android Browser	Blackberry Browser	Opera Mobile	Android Chrome	Android Firefox	IE Mobile	Android UC Browser	Samsung Internet	QQ Browser	Baidu Browser	KaiOS Browser
26.1
26.0	all	141	10	80	141	143	11 ⁽²⁾	15.5	28	14.9	13.52	3.0-3.1
18.5-18.6		4.4.3-4.4.4	7	12.1			10 ⁽²⁾		27			2.5
18.4		4.4		12					26
18.3		4.2-4.3		11.5					25
Show all
18.2		4.1		11.1					24
18.1		4		11					23
18.0		3		10					22
17.6-17.7		2.3							21
17.5		2.2							20
17.4		2.1							19.0
17.3									18.0
17.2									17.0
17.1									16.0
17.0									15.0
16.6-16.7									14.0
16.5									13.0
16.4									12.0
16.3									11.1-11.2
16.2									10.1
16.1									9.2
16.0									8.2
15.6-15.8									7.2-7.4
15.5									6.2-6.4
15.4									5.0-5.4
15.2-15.3									4
15.0-15.1
14.5-14.8
14.0-14.4
13.4-13.7
13.3
13.2
13.0-13.1
12.2-12.5
12.0-12.1
11.3-11.4
11.0-11.2
10.3
10.0-10.2
9.3
9.0-9.2
8.1-8.4
8
7.0-7.1 ⁽³⁾
6.0-6.1 ^(2,3)
5.0-5.1
4.2-4.3
4.0-4.1
3.2

Notes

Partial support in IE9 refers to supporting "vm" instead of "vmin".
Partial support refers to not supporting the "vmax" unit.
Partial support in iOS7 is due to buggy behavior of the "vh" unit (see workarounds: 1, 2).

Bugs

In Firefox there is a documented bug where 100vh has no effect on any element with its display property set to table.
Chrome does not support viewport units for border widths, column gaps, transform values, box shadows or in calc() until version 34.
Safari & iOS Safari (both 6 and 7) does not support viewport units for border widths, column gaps, transform values, box shadows or in calc().
iOS 7 Safari sets viewport unit values to 0 if the page has been left and is returned to after 60 seconds.
Internet Explorer 9 in print-mode interprets vh as pages. 30vh = 30 pages
iOS 7 Safari recalculates widths set in vh as vw, and heights set in vw as vh, when orientation changes.
In IE 10 and 11, using vw units with 3D transforms causes unexpected behavior
Currently all browsers but Firefox incorrectly consider 100vw to be the entire page width, including vertical scroll bar, which can cause a horizontal scroll bar when overflow: auto is set.
IE9 does not calculate viewport units correctly when the browser or OS is zoomed.
In IE9 inside an iframe, viewport units will be calculated in the context of the parent window and not the iframe.
On iOS Safari and Chrome for Android, 100vw 100vh are sized to the 'largest possible viewport' where they may be larger than <html> 100% being the 'smallest possible viewport', all during the user's scrolling. On Safari for iPad with the sidebar on, the 'largest possible viewport' may be when the content is scrolled until it fills all the area beneath the blurred sidebar.
IE and Edge truncate all units to 2 decimals places. Lengths coming from fractions may not be rendered with the expected value.

Resources

Data by caniuse.com
Licensed under the Creative Commons Attribution License v4.0.
https://caniuse.com/viewport-units