Check Laptop Temperature: 2026 Guide for Windows & Mac

1) How Do You Check Laptop Temperature in BIOS or UEFI?

Your laptop’s BIOS or UEFI may show a CPU temperature before the operating system loads. Restart the laptop and press the manufacturer’s setup key during startup. Common examples include F2, Delete, or Esc followed by another function key, but the correct key depends on the exact model.

On supported laptops you can also reach the firmware from Windows. In Windows 11, go to Settings → System → Recovery → Advanced startup → Restart now → Troubleshoot → Advanced options → UEFI Firmware Settings. In Windows 10, the path is Settings → Update & Security → Recovery → Advanced startup → Restart now, then the same Troubleshoot steps. This route avoids repeatedly pressing a startup key, although the UEFI option may not appear on every system.

Inside firmware settings, look for labels such as Hardware Monitor, System Health, PC Health Status, Thermal, or CPU Temperature. Not all laptops expose sensor data. When a reading is available, treat it as a low-load baseline, not proof of how the laptop behaves during gaming, rendering, charging, or video calls.

2) Can Built-in Operating System Tools Show Laptop Temperature?

Built-in support is limited on Windows and macOS and depends on the hardware sensors and drivers; ChromeOS is the exception. A CPU package sensor, individual core sensor, GPU core, GPU hotspot, SSD, battery, and ACPI thermal zone can all show different values. Check the sensor label before deciding that two apps disagree.

Windows 10 and Windows 11

Press Ctrl+Shift+Esc, open Performance, and select the GPU. Task Manager has shown GPU temperature since the Windows 10 May 2020 Update, but only for a dedicated graphics card with a WDDM 2.4-or-newer driver, and only in °C. Integrated graphics do not get a reading, and Task Manager does not show CPU temperature.

For CPU readings while Windows is running, install a trusted utility such as Core Temp, HWiNFO, LibreHardwareMonitor, or your laptop maker’s official software. Windows 10 reached end of support on October 14, 2025, but all of these tools still run on it.

PowerShell, with caveats. Run PowerShell as administrator and enter:

Get-CimInstance -Namespace root/wmi -ClassName MSAcpi_ThermalZoneTemperature | Select-Object InstanceName, CurrentTemperature

The value is in tenths of a kelvin: divide by 10 and subtract 273.15 to get °C (for example, 3182 → 45 °C). This reads an ACPI thermal zone reported by the firmware, not the CPU die sensor, and many laptops return an error or a fixed value that never changes. Treat it as a curiosity, not a diagnostic tool.

macOS

macOS does not provide a built-in temperature dashboard, and Activity Monitor shows CPU load but not temperature. On Intel Macs, Terminal can expose the CPU die temperature with this command:

sudo powermetrics --samplers smc | grep -i "CPU die temperature"

That SMC sampler is not available on Apple silicon. On M-series Macs, sudo powermetrics --samplers thermal reports a thermal pressure level (for example Nominal) rather than a temperature, which still tells you whether macOS is holding the chip back. For actual degrees on Apple silicon, use a compatible utility such as Stats, Hot, Macs Fan Control, or iStat Menus that labels the available CPU, GPU, battery, and fan sensors.

Apple points out that third-party apps measure internal sensors, not the external case, which runs much cooler, and that they should not be used to diagnose hardware faults. MacBook Air models with Apple silicon have no fan at all: they slow down quietly instead of getting loud, so a fanless Mac that feels hot and stutters is throttling even though you hear nothing.

Linux

Linux users can install lm-sensors, detect supported sensors, and run sensors. On Debian or Ubuntu-based systems, a common workflow is:

sudo apt install lm-sensors
sudo sensors-detect
sensors

Package names and setup commands differ by distribution. Psensor can add a graphical view, while s-tui can display temperature, frequency, utilization, and throttling behavior in a terminal.

Without installing anything, the kernel exposes its thermal zones directly:

cat /sys/class/thermal/thermal_zone*/temp
grep . /sys/class/thermal/thermal_zone*/type

Values are in thousandths of a degree Celsius (45000 = 45 °C), and the type files tell you what each zone measures, such as x86_pkg_temp for the CPU package.

ChromeOS

Chromebooks have a true built-in option. Open the launcher, type Diagnostics, and open the app, or go to Settings → About ChromeOS → Diagnostics. The CPU section shows current usage, temperature, and current speed, and Run CPU test applies a controlled load so you can watch whether the speed drops as the temperature climbs. The app requires ChromeOS 90 or later and shows one CPU reading only, with no per-core or GPU sensors.

3) Which Laptop Temperature Monitoring Software Should You Use?

Choose a monitoring app that labels sensors clearly, updates in real time, and comes from the developer’s official site or a trusted repository.

A simple tool is enough for a quick CPU check. Use a deeper sensor dashboard when you need maximum values, clock speed, fan RPM, battery temperature, GPU hotspot data, throttle flags, or a log you can compare before and after a cooling change.

• Windows: Core Temp focuses on per-core CPU readings; its installer includes an optional bundled game offer, so uncheck it or use the standalone ZIP. HWiNFO provides broad sensor reporting, logging, throttle flags, and a “Distance to TjMAX” row. LibreHardwareMonitor is an open-source option for supported CPU, GPU, storage, and fan sensors.
• Windows in-game overlays: The NVIDIA App’s statistics overlay and AMD Software: Adrenalin Edition (Performance → Metrics) show GPU temperature, including the hotspot or junction reading, on top of a running game. MSI Afterburner with RivaTuner Statistics Server can put CPU and GPU temperatures, clocks, and frame rate on screen at the same time, which is the easiest way to watch temperatures while gaming.
• macOS: Stats is a free, open-source menu-bar monitor that supports Apple silicon and Intel. Hot, a free open-source app from iMazing, shows CPU temperature and thermal-throttling status. Macs Fan Control displays supported sensors and fan data. iStat Menus offers a broader paid system monitor. The older Fanny widget works on Intel Macs only; its last release dates from 2020, and on Apple silicon it shows fan speed but no temperature.
• Linux: Use lm_sensors with Psensor for a graphical view or s-tui for terminal-based temperature, frequency, utilization, and stress monitoring. KDE’s System Monitor can also chart lm_sensors readings.

Which Sensor Reading Matters Most?

• CPU Package: a useful overall CPU reading on many Windows systems.
• Core Max: the hottest CPU core at that moment; useful for spotting uneven or short peaks.
• Distance to TjMAX: how many degrees remain before the CPU reaches its limit; the most direct “how close am I” number, shown by HWiNFO and Core Temp.
• GPU Temperature: the main graphics-core reading shown by many tools.
• GPU Hotspot or Junction: the hottest reported point on supported GPUs and often higher than the main GPU temperature.
• SSD or NVMe: storage temperature, which should not be mistaken for CPU temperature.
• Battery: battery-pack temperature, especially relevant during charging.
• ACPI thermal zone: a firmware-reported zone (what the PowerShell query reads); often slower to update and not the CPU die itself.

What Is TjMax?

TjMax (maximum junction temperature) is the temperature at which the processor starts to protect itself by lowering clock speed. It is often 100 °C on current Intel and AMD mobile processors, but it varies by model, so look yours up: Intel lists it as TJUNCTION on the processor’s product page, and AMD lists it as Max. Operating Temperature (Tjmax). Briefly reaching TjMax under sustained heavy load is designed behavior. The problem is when the clock speed falls and stays down, or when the laptop shuts off.

4) How Do You Test Laptop Temperature Reliably?

A repeatable test tells you more than a screenshot taken at a random moment. Keep the laptop on the same hard surface, use the same power mode, and test in a similar room temperature. A hotter room raises every reading: Apple, for example, specifies an ambient range of 10–35 °C (50–95 °F) for Mac laptops, and other makers publish similar limits in their spec sheets. Close updates and background tasks that would make one run heavier than another.

1. Record the baseline: Let the laptop sit for about 10 minutes with no demanding app open. Note CPU Package, Core Max, GPU temperature, fan speed if available, clock speed, and confirm the throttle flags read “No.”
2. Run a normal workload: Use the game, editor, video call, browser workload, or other task that causes concern for 10–15 minutes.
3. Record maximum and sustained behavior: A one-second peak matters less than a temperature that stays high while clock speed and performance fall or a throttle flag flips to “Yes.”
4. Repeat after one change: Clean the vents, switch from Performance to Balanced, elevate the rear, or close background apps. Change only one factor before testing again.

Where to Find Throttle Flags

• HWiNFO (Sensors view): On Intel CPUs, the “Core Thermal Throttling” and “Package/Ring Thermal Throttling” rows show Yes or No. On AMD CPUs, look for the thermal-throttling (HTC) status row. Both also show “Core Distance to TjMAX.”
• ThrottleStop (Intel laptops on Windows): The Limit Reasons window lights up PROCHOT for thermal throttling, PL1 or PL2 for power limits, and BD PROCHOT when another component such as the GPU or battery is triggering the slowdown.
• Windows Event Viewer: Under Windows Logs → System, entries from Kernel-Processor-Power with Event ID 37 (“The speed of processor … is being limited by system firmware”) record throttling episodes even when no monitoring app was running.
• macOS: sudo powermetrics --samplers thermal; any pressure level above Nominal means macOS is limiting performance.
• ChromeOS: In Diagnostics, watch “Current speed” against temperature while the CPU test runs.

5) How Should You Inspect and Clean Laptop Cooling?

Dust can restrict airflow through the intake, fan, and heatsink fins. Inspect the vents when fan noise rises, temperatures worsen, or the laptop has been used around pets, bedding, carpet, smoke, or workshop dust. A six-to-twelve-month check is a practical starting point for many homes, but the condition of the vents matters more than the calendar.

Shut the laptop down, unplug it, and use short bursts of compressed air from outside the vents. Follow the model’s service guide before removing the bottom cover. If you can safely access the fan, keep its blades from free-spinning while cleaning and avoid touching other components with the air nozzle.

If heat problems continue after external cleaning, confirm that the fan runs and that no intake is blocked. Blankets, pillows, and soft laps can cover bottom vents and cause a fast rise in temperature.

Signs Your Laptop Needs Cooling Maintenance

• Fans run loudly during basic tasks such as browsing or document editing.
• The keyboard, hinge, underside, or exhaust area feels much hotter than usual.
• Games, video exports, or other heavy apps slow down after several minutes.
• The laptop shuts down or restarts during a demanding workload.
• Repeated tests show higher temperatures or lower clock speeds than before.
• On fanless laptops (MacBook Air with Apple silicon, many Chromebooks, Surface Pro), there is no fan noise to warn you; sustained slowdowns and a hot chassis are the signs.

6) How Can You Lower Laptop Temperature Safely?

Start with airflow, workload, and official power modes. Hardware changes should come last because laptop cooling parts and thermal materials are model-specific.

• Vendor thermal modes: Many laptops include “Performance,” “Balanced,” “Quiet,” or similar profiles that change power limits and fan behavior. Lenovo: Lenovo Vantage on most IdeaPad and ThinkPad models, with Fn+Q cycling modes on many of them; on newer ThinkPads, Intelligent Cooling follows the Windows power-mode setting and Fn+T toggles its auto mode (Intel models), while Legion and LOQ gaming laptops use Legion Space. Dell: the thermal profile lives in MyDell (XPS, Inspiron, Vostro) or Dell Optimizer (Latitude, Precision); the older Dell Power Manager is discontinued and its settings moved into those apps. HP: OMEN Gaming Hub → Performance Control on OMEN and Victus laptops, or HP Command Center on other HP models. ASUS: Armoury Crate on ROG and TUF machines, MyASUS fan profiles on Vivobook and Zenbook. Acer: NitroSense or PredatorSense on Nitro and Predator models. MSI: MSI Center. Apple: macOS has no fan profiles, but Low Power Mode (System Settings → Battery) trims heat and noise, and High Power Mode exists on supported MacBook Pro models with Max chips.
• Windows power mode: In Windows 11, go to Settings → System → Power & battery → Power mode and pick Best power efficiency, Balanced, or Best performance; many laptops keep separate settings for plugged-in and battery. Windows 10 uses the power slider in the taskbar battery flyout. Vendor thermal modes and the Windows power mode work on top of each other, so check both.
• Fan curves: Some models allow custom fan behavior through official utilities. BIOS-level laptop fan control is less common than desktop fan control.
• External airflow: Elevating the rear or using a cooling pad may help when the laptop has bottom intake vents. The result depends on vent placement, fan layout, and the surface below the laptop.
• Power limits: Balanced mode, a frame-rate cap, or a lower performance profile can reduce heat with a smaller performance loss than severe throttling.
• Workload control: Close unused apps, reduce unnecessary browser tabs, pause background indexing, and lower demanding game or rendering settings.
• Thermal materials: Replace thermal paste or pads only when the service guide supports it and you know the correct material and thickness. A wrong pad thickness can reduce heatsink contact.
• Undervolting: Support varies by processor and firmware, and many laptops lock voltage control. Do not bypass safety protections or copy values from another model.

What Laptop Temperatures Are Normal?

Normal temperature depends on the processor, GPU, laptop thickness, fan profile, room temperature, and workload. Use the exact processor’s published TjMax and the laptop maker’s diagnostics when available. The ranges below are broad troubleshooting guides, not universal safety limits.

Short peaks near a processor’s TjMax are not automatically dangerous. Investigate when temperature stays at the limit, performance repeatedly falls, fans fail to respond, or the laptop shuts down. Processor limits vary, so avoid treating one number such as 90 °C (194 °F) as a universal pass-or-fail point.

Related Guides

• Laptop for Graphics Work
• Gaming Laptop
• Convertible Touchscreen Laptop
• Tent Lighting

Frequently Asked Questions

Conclusion

The best way to check laptop temperature is to monitor the correct CPU and GPU sensors, plus the throttle flags, during the workload that causes concern. Use BIOS or UEFI only for a quick baseline, and on a Chromebook start with the built-in Diagnostics app.

Judge the result by the pattern: temperature, clock speed, fan response, and performance, measured against your processor’s own TjMax. If the laptop stays hot while clocks fall or shutdowns occur, clear the vents, test a balanced thermal mode, reduce unnecessary workload, and use the model’s service guidance before opening the device.

Sources

1. Microsoft Windows Insider Blog — GPU temperature in Task Manager: dedicated GPUs only, WDDM 2.4 driver requirement, Celsius only.
2. Apple Support — Mac laptop ambient operating range (10–35 °C) and the difference between sensor and case temperature.
3. Google Chromebook Help — the ChromeOS Diagnostics app and its CPU temperature and speed readouts.
4. Arch Wiki: lm_sensors — Linux sensor detection and temperature-monitoring guidance.
5. Lenovo Support — how the Intelligent Cooling feature and its modes are adjusted.
6. Dell Support — Dell Power Manager thermal management and its replacement by Dell Optimizer and MyDell.
7. HP Tech Takes — OMEN Gaming Hub Performance Control for thermal and power settings.
8. ASUS Support — Armoury Crate compatible devices.
9. iFixit — fan and interior cleaning guide (13-inch MacBook Pro, Early 2015); the compressed-air and hold-the-fan advice applies to most laptops.