◆ Excel · formulas

Data Calculation

Calculate daily totals and peak-hour vehicle totals from the raw count columns in CorridorCounts by adding SUMIFS form…

2heights
4tasks
2roles do it
See the prompt↓More formulas workflows

The same job, four prompts

do it · improve it · decide · become
AExecute — “help me do it”Calculate daily totals and peak-hour vehicle totals from the raw count columns in…+
Calculate daily totals and peak-hour vehicle totals from the raw count columns in CorridorCounts by adding SUMIFS formulas and a totals row for each date and corridor.
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed.
BImprove — “do it better”Add SUMIFS formulas to CorridorCounts to compute total daily volumes and separate peak-hour…+
Add SUMIFS formulas to CorridorCounts to compute total daily volumes and separate peak-hour totals, include a totals row per corridor, and add a sanity-check column that flags days where peak hour exceeds daily total so I can catch data entry errors before modeling.
when the reply comes backPush once: ask it to sharpen the weakest part, and to say what it assumed.

How to do it

the tool · the steps · what to avoid
The tool
Formulas

Formulas in Excel perform calculations and operations on data within your worksheets.

  1. 1

    Select the empty cell where you want to enter the formula.

  2. 2

    Type an equal sign (=) to indicate the start of a formula.

    NoteThis tells Excel you are entering a calculation, not just text.

  3. 3

    Type the constants and operators, or a built-in function, for your calculation.

    Best practiceFor simple math, use operators like + (addition), - (subtraction), * (multiplication), and / (division).

  4. 4

    Press Enter (Windows) or Return (Mac) to complete the formula.

  5. 5

    To quickly apply the same formula to a range, select the range.

  6. 6

    Type the formula, then press Ctrl+Enter to fill the range.

  7. 7

    To evaluate a nested formula, select the cell containing the formula.

  8. 8

    On the Formulas tab, in the Formula Auditing group, select Evaluate Formula.

  9. 9

    Select Evaluate to examine each step of the formula.

  10. 10

    On the Formulas tab, click Calculation Options.

  11. 11

    Ensure that Automatic is selected for automatic recalculation.

    CautionIf not set to Automatic, formulas may not update immediately after data changes.

Use the Formulas tab to access tools for auditing, evaluating, and managing your formulas.

Formulas can be automated and generated programmatically using Excel's object model in VBA or through external libraries for languages like Python.

Glossary

words on this page
Calculation OptionsSettings that control how and when formulas are recalculated in a workbook.ExampleYou change the calculation options to manual so formulas only update when you press F9.
Evaluate FormulaA tool that steps through each part of a formula to show how it calculates its final result.ExampleYou can watch step-by-step as a complex formula calculates its final number.
Formula AuditingTools for checking formulas for errors and understanding their relationships with other cells.ExampleYou can trace which cells feed into a formula and check for any errors.
FunctionA predefined formula that performs calculations using specific values in a particular order.ExampleUsing the SUM function quickly adds up a column of numbers.

The real tasks

2 of them
Quickly calculate daily and peak hour vehicle totals from raw count columns so I can feed them into models.
Use simple formulas to calculate days since the last inspection for every property so overdue sites flag up.

Who does this

2 roles
Transportation PlannerZoning Inspector

Questions people ask

honest answers

Because you rarely think 'I want the redaction tool'. You think 'I have to share this without leaking the client's details'. Start from the need, and the feature finds you.

Real. Every job here was drawn from what people in real roles were actually seen doing in Excel — not a feature checklist.

No. Each page gives you a ready prompt you can paste into an AI assistant, plus the plain steps to do it yourself. Start with either — the goal is the finished job, not the tool.