Home Back

Watts to Heat Water Calculator

Heat Calculation Formula:

\[ \Delta T = \frac{P \times t}{m \times 4186} \]

Watts (W)
seconds (s)
kilograms (kg)

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is the Watts to Heat Water Calculation?

This calculator determines the temperature change of water when a specific amount of power is applied for a certain duration. It's based on the specific heat capacity of water (4186 J/kg°C).

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \Delta T = \frac{P \times t}{m \times 4186} \]

Where:

Explanation: The formula calculates how much energy is delivered to the water and divides by the water's heat capacity to determine temperature rise.

3. Importance of Heat Calculation

Details: This calculation is essential for designing heating systems, understanding energy requirements for water heating, and various engineering applications.

4. Using the Calculator

Tips: Enter power in watts, time in seconds, and mass in kilograms. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is the specific heat capacity 4186?
A: This is the experimentally determined value for liquid water at standard conditions (4186 Joules per kilogram per degree Celsius).

Q2: Does this work for other liquids?
A: No, this calculator is specific to water. Other liquids have different specific heat capacities.

Q3: What about heat losses?
A: This calculation assumes perfect insulation with no heat loss to the environment.

Q4: Can I use minutes instead of seconds?
A: Yes, but you'll need to convert minutes to seconds (multiply by 60) before entering the value.

Q5: What if my water is already hot?
A: The calculation gives you the temperature change, which you can add to your starting temperature.

Watts to Heat Water Calculator© - All Rights Reserved 2025