# Efficiency Calculator

If you want to determine the ratio between energy's input and output, then you can use this energy efficiency calculator.

The **ratio of energy** given to an object by the **output energy gained from an object** is **efficiency**. At every moment when you apply energy in the form of heat to a machine, particular energy may get wasted, and a few of it may convert to actual output. The extra-efficient engine may produce higher output.

**Table of Contents**

## Formula of Efficiency Calculator

If you want to determine the efficiency of an object/machine instantly, then you can use our efficiency calculator, or you can use the formula listed below:

η = E-out / E-in * 100%

**Where,**

η = Efficiency

E-out = Energy output

E-in = Energy input

**Note:**

To calculate friction, you can use our Friction Calculator.

### Example

For a more clear and precise understanding, let us have an example below:

Suppose a car's engine produces energy of 1700J, and as a result, the vehicle is consuming energy is 1200J only. Find out the efficiency of the car's engine.

**Given data**

Energy input = 1700J

Energy output = 1200 J

**To Find**

Efficiency = ?

**Solution**

To determine the engine's efficiency, you can use the formula listed below:

η = E-out / E-in * 100%

Putting values in the formula:

η = 1200 / 1700 * 100% = 70.58%

### How to use the Efficiency Calculator?

The steps to use the efficiency calculator are as follows:

**Step 1: **Enter the value of energy input in the first required input.

**Step 2: **Enter the value of energy output in the second required input.

**Step 3: **The calculator will automatically display an answer on the screen.

### Calculator use

If you want to determine the energy's input and output ratio, then you can use our free online energy efficiency calculator. You can use this calculator in determining the electric power, symmetries of heat energy, chemical energy, or mechanical work.