diff --git a/packages/core/src/tools/shell.ts b/packages/core/src/tools/shell.ts
index a2d3b611c57..6f735d5b1e5 100644
--- a/packages/core/src/tools/shell.ts
+++ b/packages/core/src/tools/shell.ts
@@ -32,7 +32,7 @@ import type {
   ShellOutputEvent,
 } from '../services/shellExecutionService.js';
 import { ShellExecutionService } from '../services/shellExecutionService.js';
-import { formatMemoryUsage } from '../utils/formatters.js';
+import { formatBytes } from '../utils/formatters.js';
 import type { AnsiOutput } from '../utils/terminalSerializer.js';
 import {
   getCommandRoots,
@@ -220,7 +220,7 @@ export class ShellToolInvocation extends BaseToolInvocation<
                 break;
               case 'binary_progress':
                 isBinaryStream = true;
-                cumulativeOutput = `[Receiving binary output... ${formatMemoryUsage(
+                cumulativeOutput = `[Receiving binary output... ${formatBytes(
                   event.bytesReceived,
                 )} received]`;
                 if (Date.now() - lastUpdateTime > OUTPUT_UPDATE_INTERVAL_MS) {
diff --git a/packages/core/src/utils/formatters.test.ts b/packages/core/src/utils/formatters.test.ts
index 305b2d0adb1..cc771685e15 100644
--- a/packages/core/src/utils/formatters.test.ts
+++ b/packages/core/src/utils/formatters.test.ts
@@ -6,7 +6,7 @@
 
 import { describe, it, expect } from 'vitest';
 
-import { bytesToMB, formatMemoryUsage } from './formatters.js';
+import { bytesToMB, formatBytes } from './formatters.js';
 
 describe('bytesToMB', () => {
   it('converts bytes to megabytes', () => {
@@ -16,16 +16,21 @@ describe('bytesToMB', () => {
   });
 });
 
-describe('formatMemoryUsage', () => {
+describe('formatBytes', () => {
+  it('formats values below one kilobyte in B', () => {
+    expect(formatBytes(512)).toBe('512 B');
+    expect(formatBytes(0)).toBe('0 B');
+  });
+
   it('formats values below one megabyte in KB', () => {
-    expect(formatMemoryUsage(512 * 1024)).toBe('512.0 KB');
+    expect(formatBytes(512 * 1024)).toBe('512.0 KB');
   });
 
   it('formats values below one gigabyte in MB', () => {
-    expect(formatMemoryUsage(5 * 1024 * 1024)).toBe('5.0 MB');
+    expect(formatBytes(5 * 1024 * 1024)).toBe('5.0 MB');
   });
 
   it('formats values of one gigabyte or larger in GB', () => {
-    expect(formatMemoryUsage(2 * 1024 * 1024 * 1024)).toBe('2.00 GB');
+    expect(formatBytes(2 * 1024 * 1024 * 1024)).toBe('2.00 GB');
   });
 });
diff --git a/packages/core/src/utils/formatters.ts b/packages/core/src/utils/formatters.ts
index 88946ae910b..89871786b38 100644
--- a/packages/core/src/utils/formatters.ts
+++ b/packages/core/src/utils/formatters.ts
@@ -6,13 +6,15 @@
 
 export const bytesToMB = (bytes: number): number => bytes / (1024 * 1024);
 
-export const formatMemoryUsage = (bytes: number): string => {
-  const gb = bytes / (1024 * 1024 * 1024);
+export const formatBytes = (bytes: number): string => {
+  if (bytes < 1024) {
+    return `${bytes} B`;
+  }
   if (bytes < 1024 * 1024) {
     return `${(bytes / 1024).toFixed(1)} KB`;
   }
   if (bytes < 1024 * 1024 * 1024) {
     return `${bytesToMB(bytes).toFixed(1)} MB`;
   }
-  return `${gb.toFixed(2)} GB`;
+  return `${(bytes / (1024 * 1024 * 1024)).toFixed(2)} GB`;
 };