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Mean absolute percentage Error (MAPE): |

Free online MAPE Calculator – Calculate the mean absolute percentage error (MAPE) with our easy-to-use calculator. Enter your predicted and actual values, then click the calculate button.

## Mean Absolute Percentage (MAPE) Formula

The formula of root mean absolute percentage error (MAPE) is as follows:

**MAPE = (1/n) * Σ(Ai – Pi) / Ai * 100 **

where:

- MAPE = mean square percentage error

Σ = summation operator

Pi = predicted value for the ith observation

Ai = observed value(Actual Value) for the ith observation

n = number of observations

## How to Calculate MAPE?

To calculate the Mean Absolute Percentage Error (MAPE), follow these steps:

**Step 1:** Gather data

Collect the actual values (Ai) and the corresponding forecasted or predicted values (Pi ) for a set of observations.

**Step 2:** Compute absolute percentage errors

For each observation, calculate the absolute percentage error using the formula

Absolute Percentage Error = (Ai – Pi) / Ai

**Step 3**: Calculate MAPE

To find the Mean Absolute Percentage Error, take the average of all the absolute percentage errors:

**Step 4:** Convert to percentage

The MAPE value is expressed as a percentage, indicating the average absolute percentage error across all observations.

## What is mean absolute percentage error (MAPE)

Mean Absolute Percentage Error (MAPE) is a metric used to evaluate the accuracy of a prediction method. It measures the percentage difference between the predicted values and the actual values.