How to Enable and Customise Speedometer and Speed Limit Alerts in Google Maps

Maintaining awareness of your vehicle’s speed and changing road limits is essential for safe driving and avoiding traffic penalties. Google Maps features a built-in digital Speedometer alongside real-time Speed Limit warnings within its turn-by-turn navigation interface. When driving, the app displays your GPS-calculated speed directly beside the posted road limit and changes colour when you exceed safe thresholds.

How Google Maps Calculates Speed and Thresholds

The speedometer in Google Maps derives its data directly from your smartphone’s internal GPS receiver and motion sensors. Rather than reading the vehicle’s onboard mechanical odometer, it measures velocity by calculating the distance covered between satellite location pings over short intervals.

Key features of the speed monitoring system include:

• Side-by-side indicator: Shows your current velocity immediately adjacent to the circular speed limit badge of the current motorway or surface street.
• Dynamic visual alerts: When your speed surpasses the posted speed limit, the speedometer icon shifts from white to red or bold orange to alert you without distracting audio chimes.
• Unit synchronisation: Automatically toggles between miles per hour (mph) and kilometres per hour (km/h) based on your system locale or regional road standards.

How to Enable the Speedometer and Speed Limits on Android

On Android devices, both the digital speedometer and speed limit warnings can be toggled independently within the main app preferences:

1. Open the Google Maps app on your Android device.
2. Tap your profile picture or initial icon in the top-right corner of the search bar.
3. Select Settings from the menu sheet.
4. Scroll down and tap Navigation settings.
5. Scroll to the Driving options section.
6. Toggle Speedometer to the On position.
7. Toggle Speed limits to On.

Once activated, initiate any turn-by-turn navigation route. The speed indicator will appear in the lower-left corner of the navigation screen once your vehicle reaches a minimum travel velocity (approximately 5–10 km/h).

How to Enable the Speedometer on iPhone (iOS)

Following updates to the iOS edition of Google Maps, Apple users can access the same speedometer overlay alongside standard CarPlay integration:

1. Open Google Maps on your iPhone.
2. Tap your profile picture or account circle in the upper right.
3. Select Settings, then choose Navigation.
4. Under the Map display section, locate the Speedometer toggle.
5. Turn the switch On.
6. Verify that Show speed limits is also enabled.

Switching Between Miles and Kilometres

If travelling abroad across jurisdictions with different unit standards (such as crossing between the United Kingdom and continental Europe):

1. Go to Settings > Navigation settings (or Navigation on iOS).
2. Locate the Distance units preference.
3. Choose between Automatic, Kilometres, or Miles.

Troubleshooting Speedometer Accuracy and Availability

• Speedometer icon does not appear: Google Maps suppresses the speedometer when the vehicle is stationary or when GPS accuracy is degraded. Ensure your device has an unobstructed view of the sky and that location services are set to Precise Location.
• Regional availability restrictions: In certain countries or municipalities, local traffic laws or map data constraints restrict Google Maps from displaying posted speed limits. In these jurisdictions, the speedometer functions normally, but the limit sign will be omitted.
• Discrepancy with vehicle dashboard: Most vehicle manufacturers calibrate physical speedometers to read slightly higher than actual speed (often by 2–5%) to comply with regulatory safety margins. GPS speed calculations represent true ground speed, but should always remain secondary to your dashboard instruments.