1. What is Watt?

The watt (symbol: W) is the unit of power in the International System of Units (SI). It is defined as one joule per second and is used to quantify the rate of energy transfer.

2. How Does the Calculator Work?

The calculator uses the power formula:

Where:

• \( P \) — Power in watts (W)
• \( W \) — Work done in joules (J)
• \( t \) — Time in seconds (s)

Explanation: Power is the rate at which work is done or energy is transferred over time.

3. Importance of Power Calculation

Details: Calculating power is essential in physics, engineering, and everyday applications to understand energy efficiency, machine performance, and electrical systems.

4. Using the Calculator

Tips: Enter work in joules and time in seconds. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between watts and watt-hours?
A: Watts measure power (energy per unit time), while watt-hours measure energy (power × time).

Q2: How many watts are in a horsepower?
A: 1 horsepower ≈ 745.7 watts.

Q3: What's a typical power consumption for household appliances?
A: LED bulb: 5-15W, Laptop: 50W, Refrigerator: 100-400W, Microwave: 600-1200W.

Q4: Can I calculate watts from voltage and current?
A: Yes, using P = V × I (power = voltage × current).

Q5: Why is power important in electrical systems?
A: It helps determine energy usage, system capacity, and operating costs.