Customize tooltip and format the number to 2 decimal places of highcharts

Question

I am using Highcharts graph to display a pie chart. I want to change the tooltip to display the actual data field along with the series name in place of the percent

Answer 1

You can use Format Strings to help you format numbers and dates.

x Decimal Places

View the JSFiddle

// point.percentage = 29.9345816
pointFormat: '{point.percentage:.0f}%' // returns: `30%` - (rounds to nearest)
pointFormat: '{point.percentage:.1f}%' // returns: `29.9%`
pointFormat: '{point.percentage:.2f}%' // returns: `29.93%`
pointFormat: '{point.percentage:.3f}%' // returns: `29.935%`

Thousands separator

View the JSFiddle

// point.percentage = 1029.9
{point.percentage:,.0f} // returns: `1,030`
{point.percentage:,.1f} // returns: `1,029.9`

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Read More in the documentation:

Documentation: http://www.highcharts.com/docs/chart-concepts/labels-and-string-formatting