diff --git a/frappe/public/js/frappe/widgets/chart_widget.js b/frappe/public/js/frappe/widgets/chart_widget.js
index c1f5e6053f..104c457991 100644
--- a/frappe/public/js/frappe/widgets/chart_widget.js
+++ b/frappe/public/js/frappe/widgets/chart_widget.js
@@ -208,6 +208,7 @@ export default class ChartWidget extends Widget {
 
 		this.fetch(this.filters, true, this.args).then(data => {
 			if (this.chart_doc.chart_type == "Report") {
+				this.report_result = data;
 				this.summary = data.report_summary;
 				data = this.get_report_chart_data(data);
 			}
@@ -571,6 +572,13 @@ export default class ChartWidget extends Widget {
 			axisOptions: {
 				xIsSeries: this.chart_doc.timeseries,
 				shortenYAxisNumbers: 1
+			},
+			tooltipOptions: {
+				formatTooltipY: value =>
+					frappe.format(value, {
+						fieldtype: this.report_result.chart.fieldtype,
+						options: this.report_result.chart.options
+					}, { always_show_decimals: true, inline: true })
 			}
 		};
 
@@ -750,4 +758,4 @@ export default class ChartWidget extends Widget {
 			this.dashboard_chart && this.dashboard_chart.draw(true);
 		});
 	}
-}
\ No newline at end of file
+}