1. What is PSU Wattage Calculation?

This calculator determines the recommended power supply unit (PSU) wattage for your laptop by adding a 20-30% safety margin to your laptop's power requirements. This ensures stable operation and accounts for power spikes.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( P_{total} \) — Recommended PSU wattage
• \( P_{laptop} \) — Your laptop's power requirement
• 1.2 to 1.3 — Safety margin (20-30%)

Explanation: The safety margin accounts for power spikes, aging components, and ensures the PSU isn't running at maximum capacity all the time.

3. Importance of Proper PSU Wattage

Details: Using a PSU with adequate wattage prevents overheating, ensures stable performance, and prolongs the lifespan of both your laptop and power supply.

4. Using the Calculator

Tips: Enter your laptop's power requirement in watts (usually found on the original power adapter) and select your desired safety margin (20-30% recommended).

5. Frequently Asked Questions (FAQ)

Q1: Why add a safety margin?
A: The margin accounts for power spikes during high-load operations and ensures the PSU isn't constantly running at maximum capacity.

Q2: Can I use a higher wattage PSU than recommended?
A: Yes, your laptop will only draw the power it needs. Higher wattage PSUs run cooler and more efficiently at partial loads.

Q3: Where do I find my laptop's power requirement?
A: Check the label on your original power adapter - it will show the output wattage (e.g., "65W").

Q4: What happens if I use an underpowered PSU?
A: The laptop may not charge properly, throttle performance, or shut down during high-load operations.

Q5: Does voltage matter as well as wattage?
A: Absolutely! The voltage must match exactly (e.g., 19.5V), while wattage can be equal or higher to the original.