diff --git a/.changeset/bigint-convert.md b/.changeset/bigint-convert.md
new file mode 100644
index 0000000000..7b07297ad3
--- /dev/null
+++ b/.changeset/bigint-convert.md
@@ -0,0 +1,5 @@
+---
+'@backstage/kubernetes-react': patch
+---
+
+Fixed bug in string-to-integer conversion to properly handle decimal values with BigInt.
diff --git a/plugins/kubernetes-react/src/utils/pod.test.tsx b/plugins/kubernetes-react/src/utils/pod.test.tsx
index c48e40cd42..b27df01519 100644
--- a/plugins/kubernetes-react/src/utils/pod.test.tsx
+++ b/plugins/kubernetes-react/src/utils/pod.test.tsx
@@ -33,6 +33,7 @@ describe('pod', () => {
       [10.0, '100'],
       [10.1, '100'],
       ['10', 100.1],
+      ['10.0', 100.1],
     ])('%p out of %p gives 10%%', (current, resource) =>
       expect(currentToDeclaredResourceToPerc(current, resource)).toBe('10%'),
     );
diff --git a/plugins/kubernetes-react/src/utils/pod.tsx b/plugins/kubernetes-react/src/utils/pod.tsx
index 498d5c9802..bd7d8342fd 100644
--- a/plugins/kubernetes-react/src/utils/pod.tsx
+++ b/plugins/kubernetes-react/src/utils/pod.tsx
@@ -127,10 +127,10 @@ export const currentToDeclaredResourceToPerc = (
   }
 
   const numerator: bigint = BigInt(
-    typeof current === 'number' ? Math.round(current) : current,
+    typeof current === 'number' ? Math.round(current) : Number(current),
   );
   const denominator: bigint = BigInt(
-    typeof resource === 'number' ? Math.round(resource) : resource,
+    typeof resource === 'number' ? Math.round(resource) : Number(resource),
   );
 
   return `${(numerator * BigInt(100)) / denominator}%`;
diff --git a/plugins/kubernetes-react/src/utils/resource.test.ts b/plugins/kubernetes-react/src/utils/resource.test.ts
new file mode 100644
index 0000000000..6f45e8b617
--- /dev/null
+++ b/plugins/kubernetes-react/src/utils/resource.test.ts
@@ -0,0 +1,32 @@
+import { currentToDeclaredResourceToPerc } from './resources';
+
+/*
+ * Copyright 2025 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+describe('currentToDeclaredResourceToPerc', () => {
+  it.each([
+    [10, 100],
+    [10, '100'],
+    ['10', 100],
+    ['10', '100'],
+    ['10', 100.0],
+    [10.0, '100'],
+    [10.1, '100'],
+    ['10', 100.1],
+    ['10.0', 100.1],
+  ])('should handle with decimal values', (current, resource) =>
+    expect(currentToDeclaredResourceToPerc(current, resource)).toBe(10),
+  );
+});
diff --git a/plugins/kubernetes-react/src/utils/resources.ts b/plugins/kubernetes-react/src/utils/resources.ts
index 916aa3463c..d11c873c93 100644
--- a/plugins/kubernetes-react/src/utils/resources.ts
+++ b/plugins/kubernetes-react/src/utils/resources.ts
@@ -23,8 +23,12 @@ export const currentToDeclaredResourceToPerc = (
     return Math.round((current / resource) * 100);
   }
 
-  const numerator: bigint = BigInt(current);
-  const denominator: bigint = BigInt(resource);
+  const numerator: bigint = BigInt(
+    typeof current === 'number' ? Math.round(current) : Number(current),
+  );
+  const denominator: bigint = BigInt(
+    typeof resource === 'number' ? Math.round(resource) : Number(resource),
+  );
 
   return Number((numerator * BigInt(100)) / denominator);
 };