diff --git a/src/helpers/helpers.math.ts b/src/helpers/helpers.math.ts
index 0fd2a95132c..de784e5f1a8 100644
--- a/src/helpers/helpers.math.ts
+++ b/src/helpers/helpers.math.ts
@@ -116,6 +116,9 @@ export function _decimalPlaces(x: number) {
   while (Math.round(x * e) / e !== x) {
     e *= 10;
     p++;
+    if (!isFinite(e)) {
+      return;
+    }
   }
   return p;
 }
diff --git a/test/specs/helpers.math.tests.js b/test/specs/helpers.math.tests.js
index 938742959da..4a7fbf3e932 100644
--- a/test/specs/helpers.math.tests.js
+++ b/test/specs/helpers.math.tests.js
@@ -36,6 +36,9 @@ describe('Chart.helpers.math', function() {
     expect(decimalPlaces(undefined)).toBe(undefined);
     expect(decimalPlaces(12345678.1234)).toBe(4);
     expect(decimalPlaces(1234567890.1234567)).toBe(7);
+    // Numbers so small that the multiplier overflows to Infinity — must not loop forever
+    expect(decimalPlaces(1e-305)).toBe(undefined);
+    expect(decimalPlaces(Number.MIN_VALUE)).toBe(undefined);
   });
 
   it('should get an angle from a point', function() {