**Excel** is the most widely used tool when it comes to dealing with huge datasets. We can perform myriads of tasks of multiple dimensions in **Excel**. Sometimes, we need to calculate the peak area in **Excel**. In this article, I will show **2** effective methods to do so.

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## 2 Effective Methods to Calculate Peak Area in Excel

This is the dataset that I am going to work with. The dataset is a graphical representation of the equation **y=sinx** ranging from **0 to pi**. The graph clearly has a peak at **sin (pi/2)** where the corresponding **y value** is **1**. We will **calculate the area** of this graph now.

### 1. Use Trapezoidal Rule to Calculate Peak Area in Excel

In this section, I will show how to use the trapezoidal rule to calculate peak area in Excel. In this method, __we will divide the curve into some smaller trapezoids__. Then we will calculate the **area** for those trapezoids **individually** and then **add** those small areas to get the final area.

Notice that the small segments are like trapezoids. ** The smaller the segments are, the more they resemble to a trapezoid**. After that we will calculate the areas of these small trapezoids.

**Steps:**

- Go to
**D5**and write the following formula

`=(C5+C4)/2*(B5-B4)`

**Explanation:**

**C4 and C5**represent the lengths of the parallel lines here. These are along y-axis in the graph.- (
**B5-B4**) represents the distance between the parallel lines. They are along x-axis in the graph.

- Now press
**ENTER**.**Excel**will calculate the area for a trapezoid.

- Now use
**Fill Handle**to**AutoFill**up to**D16**.**Excel**will calculate the areas.

- After that, we will add the areas using
**the SUM function**. Go to**D18**and write the following formula

`=SUM(D5:D16)`

- After that, press
**ENTER**.**Excel**will calculate the final area.

**Note:** The result is not exactly **2** as it should be. Thatâ€™s because we ** assumed** the segments as trapezoids. But actually,

**. Thatâ€™s why the discrepancy results. Had the segments been smaller, they would have resembled trapezoid more and we would have got the result closer to**

__they are not perfect trapezoids__**2**.

**Read More:** **How to Calculate Area Under Scatter Plot in Excel (2 Easy Methods)**

### 2. Apply Definite Integral Rule to Calculate Peak Area in Excel

Now, I will use the method of applying the definite integral rule to calculate the area.

**Steps:**

- First of all, we have to determine the integral form of
**sinx**. The integration of**sinx**is â€“**cosx**. We will ignore the**constant value**since our final target is to determine the definite integration of**sinx**ranging from**0 to pi**.

- The range is from
**0**to**pi**. So we will calculate**-cos(0)**and**-cos(pi)**. The corresponding values are**-1**and**1**.

- Our upper limit is
**pi**and the lower limit is**0**. So we will subtract**-cos(0)**from**-cos(pi)**. Go to**F9**and write down the formula

`=F8-F7`

- Now press
**ENTER**.**Excel**will calculate the area under the peak.

**Read More:** **How to Calculate Area of Irregular Shape in Excel (3 Easy Methods)**

## Things to Remember

- The equation for the area of a trapezoid is
**A = (a+b)/2 * h**.

Where, **a** and **b** are the **length of two parallel sides**

**h** is the **distance between the parallel sides**.

- The integration of
**sinx**is**-cosx** - The value for
**cos(0)**and**cos(pi)**can also be calculated using**the COS function**. Note that the**angles**are in**radian**.

## Conclusion

In this article, I have demonstrated **2** effective methods for how to calculate peak area in **Excel**. I hope it helps everyone. And lastly, if you have any kind of suggestions, ideas, or feedback please feel free to comment down below.