diff --git a/explorer/client/src/components/ownedobjects/OwnedObjects.tsx b/explorer/client/src/components/ownedobjects/OwnedObjects.tsx
index 8a7ecc922ace3..45ab01a50c31f 100644
--- a/explorer/client/src/components/ownedobjects/OwnedObjects.tsx
+++ b/explorer/client/src/components/ownedobjects/OwnedObjects.tsx
@@ -91,11 +91,10 @@ function OwnedObjectAPI({ id }: { id: string }) {
                                     const contents = getObjectFields(resp);
                                     const url = parseImageURL(contents);
                                     const objType = parseObjectType(resp);
-                                    // TODO: handle big number
-                                    const rawBalance = Coin.getBalance(resp);
-                                    const balanceValue = rawBalance
-                                        ? parseInt(rawBalance)
-                                        : undefined;
+                                    // TODO: handle big number by making the balance field
+                                    // in resultType a string
+                                    const balanceValue =
+                                        Coin.getBalance(resp)?.toNumber();
                                     return {
                                         id: getObjectId(resp),
                                         Type: objType,
diff --git a/sdk/typescript/src/types/framework.ts b/sdk/typescript/src/types/framework.ts
index 257af580766ec..4631ecf8b6279 100644
--- a/sdk/typescript/src/types/framework.ts
+++ b/sdk/typescript/src/types/framework.ts
@@ -5,6 +5,8 @@ import { getObjectFields, GetObjectInfoResponse } from './objects';
 
 import { getMoveObjectType } from './objects';
 
+import BN from 'bn.js';
+
 /**
  * Utility class for 0x2::Coin
  * as defined in https://github.com/MystenLabs/sui/blob/ca9046fd8b1a9e8634a4b74b0e7dabdc7ea54475/sui_programmability/framework/sources/Coin.move#L4
@@ -14,11 +16,11 @@ export class Coin {
     return getMoveObjectType(data)?.startsWith('0x2::Coin::Coin') ?? false;
   }
 
-  static getBalance(data: GetObjectInfoResponse): string | undefined {
+  static getBalance(data: GetObjectInfoResponse): BN | undefined {
     if (!Coin.isCoin(data)) {
       return undefined;
     }
-    const balance = getObjectFields(data)?.value;
-    return typeof balance === 'string' ? balance : balance?.toString();
+    const balance = getObjectFields(data)?.balance;
+    return new BN.BN(balance, 10);
   }
 }
diff --git a/sdk/typescript/test/types/framework.test.ts b/sdk/typescript/test/types/framework.test.ts
new file mode 100644
index 0000000000000..278b2a96b9c40
--- /dev/null
+++ b/sdk/typescript/test/types/framework.test.ts
@@ -0,0 +1,15 @@
+// Copyright (c) 2022, Mysten Labs, Inc.
+// SPDX-License-Identifier: Apache-2.0
+
+import mockObjectData from '../../../../sui/open_rpc/samples/objects.json';
+import { Coin, GetObjectInfoResponse } from '../../src';
+
+import BN from 'bn.js';
+
+describe('Test framework classes', () => {
+  it('Test coin utils', () => {
+    const data = mockObjectData['coin'] as GetObjectInfoResponse;
+    expect(Coin.isCoin(data)).toBeTruthy();
+    expect(Coin.getBalance(data)).toEqual(new BN.BN('100000'));
+  });
+});