Subtracting Hours

MrB 

To find the total run time for each vehicle, you can use a combination of Excel functions to calculate the difference in hour meter values and then sum these differences for each vehicle. Here's a step-by-step guide to achieve this:

1. Sort Your Data: Ensure that your data is sorted by the vehicle name and date in ascending order. This will allow you to correctly calculate the differences between successive entries for each vehicle.
2. Calculate Differences: Create a new column to calculate the difference in hour meter values for each vehicle.
3. Sum the Differences: Use the SUMIFS function to sum the differences for each vehicle.

Step-by-Step Instructions

Step 1: Prepare Your Data

Ensure your data is in the following format and sorted by NAME and DATE:

Step 2: Calculate Differences

In a new column (e.g., Column D), calculate the differences in hour meter values for each entry. Assuming your data starts from row 2:

1. In cell D2, enter the following formula:

=IF(A2=A1, C2-C1, 0)

This formula checks if the current row's vehicle name is the same as the previous row's vehicle name. If it is, it calculates the difference between the current hour meter value and the previous hour meter value. If it's not, it returns 0.

1. Drag the formula down through all rows in your dataset.

Step 3: Sum the Differences

1. Create a summary table to display the total run time for each vehicle. Assuming this starts in cell F1:

1. In cell G2 (under "TOTAL RUN TIME" for Vehicle 1), enter the following formula:

=SUMIFS($D$2:$D$1801, $A$2:$A$1801, F2)

This formula sums the values in column D where the vehicle name in column A matches the vehicle name in cell F2.

1. Drag the formula down to sum the total run time for all vehicles listed in your summary table.

Complete Example

Here is a complete example to illustrate the steps:

Original Data (Columns A to C)

Step 2: Calculate Differences (Column D)

Step 3: Sum the Differences (Summary Table in Columns F and G)

This approach ensures that you accurately calculate the total run time for each vehicle, even when your data is filtered or sorted differently. The text, steps and functions were created with the help of AI.

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Hope this will help you.

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