diff --git a/.changeset/new-ducks-learn.md b/.changeset/new-ducks-learn.md
new file mode 100644
index 00000000..13ee4704
--- /dev/null
+++ b/.changeset/new-ducks-learn.md
@@ -0,0 +1,5 @@
+---
+"leva": patch
+---
+
+fix: removes suffix/prefix from numerical outputs - only keeping it as presentation in the input
diff --git a/packages/leva/src/components/Number/number-plugin.ts b/packages/leva/src/components/Number/number-plugin.ts
index a97cdabc..be0332d0 100644
--- a/packages/leva/src/components/Number/number-plugin.ts
+++ b/packages/leva/src/components/Number/number-plugin.ts
@@ -13,11 +13,10 @@ export const schema = (v: any) => {
   return false
 }
 
-export const sanitize = (v: any, { min = -Infinity, max = Infinity, suffix }: InternalNumberSettings) => {
+export const sanitize = (v: any, { min = -Infinity, max = Infinity }: InternalNumberSettings) => {
   const _v = parseFloat(v as string)
   if (v === '' || isNaN(_v)) throw Error('Invalid number')
-  const f = clamp(_v, min, max)
-  return suffix ? f + suffix : f
+  return clamp(_v, min, max)
 }
 
 export const format = (v: any, { pad = 0, suffix }: InternalNumberSettings) => {
@@ -50,7 +49,7 @@ export const normalize = ({ value, ...settings }: NumberInput) => {
   const pad = Math.round(clamp(Math.log10(1 / padStep), 0, 2))
 
   return {
-    value: suffix ? _value + suffix : _value,
+    value: _value,
     settings: { initialValue: _value, step, pad, min, max, suffix, ..._settings },
   }
 }
diff --git a/packages/leva/stories/inputs/Number.stories.tsx b/packages/leva/stories/inputs/Number.stories.tsx
index 165afc38..8d813c07 100644
--- a/packages/leva/stories/inputs/Number.stories.tsx
+++ b/packages/leva/stories/inputs/Number.stories.tsx
@@ -1,6 +1,6 @@
 import React from 'react'
 import { StoryFn, Meta } from '@storybook/react'
-import { expect, within } from 'storybook/test'
+import { expect, within, userEvent } from 'storybook/test'
 
 import Reset from '../components/decorator-reset'
 
@@ -18,7 +18,7 @@ const Template: StoryFn = (args) => {
 
   return (
     <div>
-      <pre>{JSON.stringify(values, null, '  ')}</pre>
+      <pre data-testid="output">{JSON.stringify(values, null, '  ')}</pre>
     </div>
   )
 }
@@ -89,3 +89,39 @@ Complete.play = async ({ canvasElement }) => {
   // Verify the story renders
   await expect(canvas.getByText(/5/)).toBeInTheDocument()
 }
+
+export const SuffixValueTest = Template.bind({})
+SuffixValueTest.args = {
+  value: 10,
+  min: 10,
+  suffix: 'ms',
+}
+SuffixValueTest.play = async ({ canvasElement }) => {
+  const canvas = within(canvasElement)
+
+  // Verify initial value is a number, not a string with suffix
+  const output = canvas.getByTestId('output')
+  await expect(output.textContent).toContain('"foo": 10')
+
+  // Find the input field (Leva panel is rendered in document.body)
+  const input = within(document.body).getByLabelText(/foo/i) as HTMLInputElement
+
+  // Verify the input displays the suffix
+  await expect(input.value).toBe('10ms')
+
+  // Change the value
+  await userEvent.clear(input)
+  await userEvent.type(input, '15')
+
+  // Blur to trigger update
+  await userEvent.tab()
+
+  // Wait a bit for the state to update
+  await new Promise((resolve) => setTimeout(resolve, 100))
+
+  // Verify the returned value is numeric without suffix
+  await expect(output.textContent).toContain('"foo": 15')
+
+  // Verify it doesn't contain the suffix in the value
+  await expect(output.textContent).not.toContain('"foo": "15ms"')
+}