Leading will always depend on your chosen font size and measure (or line length). In general, the longer the measure, the longer the leading should be. Therefore, presenting a chart of the most popular choices for leading in pixels wouldn’t make sense here. More appropriate would be for you to use a relative unit, such as an em or percentage value, that determines the relation between leading and measure and between leading and font size.

Note that 1.5 is a value that is commonly recommended in classic typographic books, so our study backs up this rule of thumb. Very few websites use anything less than that. The number of websites that go above 1.48 decreases as you get further from this value.