diff --git a/pkg/api/api_impl.go b/pkg/api/api_impl.go
index 843f7f81b87..f7968eb7731 100644
--- a/pkg/api/api_impl.go
+++ b/pkg/api/api_impl.go
@@ -1146,13 +1146,13 @@ func (ctx *internalContext) Dispose() {
 func prettyPrintByteCount(n int) string {
 	var size string
 	if n < 1024 {
-		size = fmt.Sprintf("%db ", n)
+		size = fmt.Sprintf("%dB ", n)
 	} else if n < 1024*1024 {
-		size = fmt.Sprintf("%.1fkb", float64(n)/(1024))
+		size = fmt.Sprintf("%.1fKiB", float64(n)/(1024))
 	} else if n < 1024*1024*1024 {
-		size = fmt.Sprintf("%.1fmb", float64(n)/(1024*1024))
+		size = fmt.Sprintf("%.1fMiB", float64(n)/(1024*1024))
 	} else {
-		size = fmt.Sprintf("%.1fgb", float64(n)/(1024*1024*1024))
+		size = fmt.Sprintf("%.1fGiB", float64(n)/(1024*1024*1024))
 	}
 	return size
 }
diff --git a/scripts/js-api-tests.js b/scripts/js-api-tests.js
index 7d5b847ca72..577144cff1a 100644
--- a/scripts/js-api-tests.js
+++ b/scripts/js-api-tests.js
@@ -6962,15 +6962,15 @@ let analyzeTests = {
       }
     }
     assert.strictEqual(await esbuild.analyzeMetafile(metafile), `
-  out.js       100b   100.0%
-   ├ lib.js     50b    50.0%
-   └ entry.js   25b    25.0%
+  out.js       100B   100.0%
+   ├ lib.js     50B    50.0%
+   └ entry.js   25B    25.0%
 `)
     assert.strictEqual(await esbuild.analyzeMetafile(metafile, { verbose: true }), `
-  out.js ────── 100b ── 100.0%
-   ├ lib.js ──── 50b ─── 50.0%
+  out.js ────── 100B ── 100.0%
+   ├ lib.js ──── 50B ─── 50.0%
    │  └ entry.js
-   └ entry.js ── 25b ─── 25.0%
+   └ entry.js ── 25B ─── 25.0%
 `)
   },
 }
@@ -7192,15 +7192,15 @@ ${path.relative(process.cwd(), input).split(path.sep).join('/')}:1:2: ERROR: Une
       }
     }
     assert.strictEqual(esbuild.analyzeMetafileSync(metafile), `
-  out.js       100b   100.0%
-   ├ lib.js     50b    50.0%
-   └ entry.js   25b    25.0%
+  out.js       100B   100.0%
+   ├ lib.js     50B    50.0%
+   └ entry.js   25B    25.0%
 `)
     assert.strictEqual(esbuild.analyzeMetafileSync(metafile, { verbose: true }), `
-  out.js ────── 100b ── 100.0%
-   ├ lib.js ──── 50b ─── 50.0%
+  out.js ────── 100B ── 100.0%
+   ├ lib.js ──── 50B ─── 50.0%
    │  └ entry.js
-   └ entry.js ── 25b ─── 25.0%
+   └ entry.js ── 25B ─── 25.0%
 `)
   },
 }