[Solved]-Highcharts - How to format yAxis label to have single digit?-Highcharts

You can use the label.formatter callback with the logic shown below to display wanted format.

Demo: https://jsfiddle.net/BlackLabel/c0e2jwa6/

  yAxis: {
    labels: {
      formatter() {
        return this.value / 1000
      }
    },
    title: {
      text: 'Thousands'
    }
  },

https://api.highcharts.com/highcharts/yAxis.labels.formatter