Our tool does not need any physical sensor or hardware. Simply enter your current room temperature reading (from any thermometer or your AC display), outdoor temperature, room size, and humidity. The tool analyzes all these factors and gives you an instant comfort result.

For most people, 22–26°C (72–79°F) is the ideal AC room temperature. For sleeping, 18–20°C is better. However, the ideal temperature changes based on humidity — at 70% humidity, you need to lower the AC by 2–3°C to achieve the same comfort level.

The most common reasons are: (1) Room is too large for your AC capacity, (2) Very high outdoor temperature creating too much heat pressure, (3) High humidity making the room feel much warmer, (4) Too many people in the room adding body heat, or (5) Dirty AC filter reducing airflow. Enter your details in our tool above to get a specific diagnosis.

Humidity has a massive effect on how temperature feels. At 80% humidity, a 26°C room can feel like 32°C because sweat cannot evaporate to cool your body. Always use Dry/Dehumidify mode on your AC when humidity is above 65% for maximum comfort.

Yes, 100% free forever. No signup required, no app download, no subscription. Just open the website on any browser and check your room temperature online instantly. The tool works on phones, tablets, and computers.

24–26°C is the most energy-efficient AC setting that still keeps most people comfortable. Each degree lower than 24°C increases electricity consumption by approximately 6–8%. Using a ceiling fan alongside your AC allows you to raise the set temperature by 2–3°C while feeling the same comfort level, saving significant electricity.