diff --git a/packages/core/src/utils/spanUtils.ts b/packages/core/src/utils/spanUtils.ts
index 0878f0b383b3..266a0035b382 100644
--- a/packages/core/src/utils/spanUtils.ts
+++ b/packages/core/src/utils/spanUtils.ts
@@ -69,7 +69,7 @@ export function spanToTraceHeader(span: Span): string {
 }
 
 /**
- * Convert a span time input intp a timestamp in seconds.
+ * Convert a span time input into a timestamp in seconds.
  */
 export function spanTimeInputToSeconds(input: SpanTimeInput | undefined): number {
   if (typeof input === 'number') {
diff --git a/packages/core/test/lib/utils/spanUtils.test.ts b/packages/core/test/lib/utils/spanUtils.test.ts
index 2a4850947e80..d1216378787c 100644
--- a/packages/core/test/lib/utils/spanUtils.test.ts
+++ b/packages/core/test/lib/utils/spanUtils.test.ts
@@ -43,6 +43,11 @@ describe('spanTimeInputToSeconds', () => {
     expect(spanTimeInputToSeconds(timestamp)).toEqual(timestamp / 1000);
   });
 
+  it('works with a timestamp in nanoseconds', () => {
+    const timestamp = Date.now() * 1e6;
+    expect(spanTimeInputToSeconds(timestamp)).toEqual(timestamp / 1e9);
+  });
+
   it('works with a Date object', () => {
     const timestamp = new Date();
     expect(spanTimeInputToSeconds(timestamp)).toEqual(timestamp.getTime() / 1000);
diff --git a/packages/opentelemetry/src/spanExporter.ts b/packages/opentelemetry/src/spanExporter.ts
index d139044a713f..3064de5818aa 100644
--- a/packages/opentelemetry/src/spanExporter.ts
+++ b/packages/opentelemetry/src/spanExporter.ts
@@ -15,6 +15,7 @@ import {
   SEMANTIC_ATTRIBUTE_SENTRY_SAMPLE_RATE,
   SEMANTIC_ATTRIBUTE_SENTRY_SOURCE,
   getStatusMessage,
+  spanTimeInputToSeconds,
 } from '@sentry/core';
 import type { SpanJSON, SpanOrigin, TraceContext, TransactionEvent, TransactionSource } from '@sentry/types';
 import { dropUndefinedKeys, logger } from '@sentry/utils';
@@ -22,7 +23,6 @@ import { SENTRY_TRACE_STATE_PARENT_SPAN_ID } from './constants';
 
 import { DEBUG_BUILD } from './debug-build';
 import { SEMANTIC_ATTRIBUTE_SENTRY_PARENT_IS_REMOTE } from './semanticAttributes';
-import { convertOtelTimeToSeconds } from './utils/convertOtelTimeToSeconds';
 import { getRequestSpanData } from './utils/getRequestSpanData';
 import type { SpanNode } from './utils/groupSpansWithParents';
 import { getLocalParentId } from './utils/groupSpansWithParents';
@@ -176,7 +176,7 @@ function getCompletedRootNodes(nodes: SpanNode[]): SpanNodeCompleted[] {
 
 function shouldCleanupSpan(span: ReadableSpan, maxStartTimeOffsetSeconds: number): boolean {
   const cutoff = Date.now() / 1000 - maxStartTimeOffsetSeconds;
-  return convertOtelTimeToSeconds(span.startTime) < cutoff;
+  return spanTimeInputToSeconds(span.startTime) < cutoff;
 }
 
 function parseSpan(span: ReadableSpan): { op?: string; origin?: SpanOrigin; source?: TransactionSource } {
@@ -236,8 +236,8 @@ function createTransactionForOtelSpan(span: ReadableSpan): TransactionEvent {
       },
     },
     spans: [],
-    start_timestamp: convertOtelTimeToSeconds(span.startTime),
-    timestamp: convertOtelTimeToSeconds(span.endTime),
+    start_timestamp: spanTimeInputToSeconds(span.startTime),
+    timestamp: spanTimeInputToSeconds(span.endTime),
     transaction: description,
     type: 'transaction',
     sdkProcessingMetadata: {
@@ -294,9 +294,9 @@ function createAndFinishSpanForOtelSpan(node: SpanNode, spans: SpanJSON[], remai
     data: allData,
     description,
     parent_span_id: parentSpanId,
-    start_timestamp: convertOtelTimeToSeconds(startTime),
+    start_timestamp: spanTimeInputToSeconds(startTime),
     // This is [0,0] by default in OTEL, in which case we want to interpret this as no end time
-    timestamp: convertOtelTimeToSeconds(endTime) || undefined,
+    timestamp: spanTimeInputToSeconds(endTime) || undefined,
     status: getStatusMessage(status), // As per protocol, span status is allowed to be undefined
     op,
     origin,
diff --git a/packages/opentelemetry/src/utils/convertOtelTimeToSeconds.ts b/packages/opentelemetry/src/utils/convertOtelTimeToSeconds.ts
deleted file mode 100644
index 112a90572418..000000000000
--- a/packages/opentelemetry/src/utils/convertOtelTimeToSeconds.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-/** Convert an OTEL time to seconds */
-export function convertOtelTimeToSeconds(otelTime: [number, number] | number): number {
-  if (!Array.isArray(otelTime)) {
-    return otelTime;
-  }
-
-  const [seconds, nano] = otelTime;
-
-  return seconds + nano / 1_000_000_000;
-}
diff --git a/packages/opentelemetry/test/utils/convertOtelTimeToSeconds.test.ts b/packages/opentelemetry/test/utils/convertOtelTimeToSeconds.test.ts
deleted file mode 100644
index 4f4911cee0cb..000000000000
--- a/packages/opentelemetry/test/utils/convertOtelTimeToSeconds.test.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-import { convertOtelTimeToSeconds } from '../../src/utils/convertOtelTimeToSeconds';
-
-describe('convertOtelTimeToSeconds', () => {
-  it('works', () => {
-    expect(convertOtelTimeToSeconds([0, 0])).toEqual(0);
-    expect(convertOtelTimeToSeconds([1000, 50])).toEqual(1000.00000005);
-    expect(convertOtelTimeToSeconds([1000, 505])).toEqual(1000.000000505);
-  });
-});