A propriedade min-height do CSS é usado para definir a altura mínima de um determinado elemento. Ele impede que o valor usado da propriedade height se torne menor que o valor especificado para min-height. O valor de min-height substitui os dois max-height e height.

Initial valueauto
Aplica-se aall elements but non-replaced inline elements, table columns, and column groups
PercentagesThe percentage is calculated with respect to the height of the generated box's containing block. If the height of the containing block is not specified explicitly (i.e., it depends on content height), and this element is not absolutely positioned, the percentage value is treated as 0.
Computed valuethe percentage as specified or the absolute length
Animation typea length, percentage or calc();


sintaxe forma: 
min-height = 
auto |
<length-percentage [0,∞]> |
min-content |
max-content |
fit-content( <length-percentage [0,∞]> )

<length-percentage> =
<length> |

min-height: 3.5em
min-height: 10%
min-height: max-content
min-height: min-content
min-height: fit-content
min-height: fill-available

min-height: inherit



O valor fixo mínimo da altura. Veja <length> para possíveis unidades. Valores negativos fazem da declaração inválida.


O valor fixo mínimo da altura expressado como uma <percentage> do conteúdo da altura do bloco. Valores negativos fazem da declaração inválida.

max-content Experimental

The intrinsic preferred height.

min-content Experimental

The intrinsic minimum height.

fill-available Experimental

The containing block height minus horizontal margin, border and padding. Some browsers implement an ancient name for this keyword, available.

fit-content Experimental

According CSS3 Box, this is a synonym of min-content. CSS3 Sizing defines a more complex algorithm, but no browser implements it, even in an experimental way.


table {
  min-height: 75%;

form {
  min-height: 0;


CSS Box Sizing Module Level 3
# width-height-keywords
CSS Box Sizing Module Level 4
# sizing-values

BCD tables only load in the browser

Ver também