仕組みと動作原理
SUM関数はExcel業務を効率化する代表的な関数です。セル範囲に含まれるすべての数値を合計します。 複雑な集計や参照処理を簡素化し、データ分析の精度と生産性を飛躍的に高めます。
💡 わかりやすい要約
Adds up all the numbers in a selected group of cells to find the total sum.
"Think of this like adding up all the coins you have in different jars to see your total savings."
構文.
標準Excel表記法=SUM(数値1, [数値2], ...)引数一覧.
この関数で指定できるすべての引数について詳しく解説します。
The first number, cell reference, or range you want to sum.
指定例:B2:B6Additional numbers, cell references, or ranges you want to sum (up to 255).
具体的な計算例
ステップ別の実務シナリオSum Monthly Expenses
Calculate the total cost of all expenses in column B.
| Expense Item | Cost | Status | Total Cost | |
|---|---|---|---|---|
| Rent | 1200 | Paid | — | — |
| Groceries | 350 | Paid | — | — |
| Utilities | 180 | Paid | — | — |
=SUM(B2:B6)Evaluates SUM over the sample table cells, placing the verified output in cell D2.
数式ジェネレーター
ウィザードを開く引数を入力するだけで、シートにそのまま貼り付けて使える数式を作成できます。
=SUM()出力される値の特性
Returns number 1500 based on sample evaluation criteria and active cell references.
実務上のベストプラクティス
- You can select an entire column or row by clicking the header (e.g. B:B), which will sum everything in that column.
- SUM ignores blank cells and cells with text, preventing common addition errors.
よくあるミスと注意点
- If any of the cells in the range contain error values (like #VALUE!), SUM will return that error. Use AGGREGATE or SUMIFS to ignore errors.
各プラットフォーム対応表
実際のExcelおよびGoogleスプレッドシートの計算エンジン仕様に基づいた検証結果です。
Core standard function supported across all modern and legacy Microsoft Excel versions (365, 2021, 2019, 2016, 2013, 2010), as well as Excel for the Web and Mac.
100% compatible with Google Sheets. Uses identical argument order, data types, and standard calculation logic.
よくある質問と回答
技術解説Can I use SUM across different worksheets in Excel?↓
Yes. You can reference cells located on other sheets by including the sheet name followed by an exclamation mark, for example: =SUM(Sheet2!A2:A10). If the sheet name contains spaces, enclose it in single quotes: ='Q1 Report'!A2:A10.
What is the most common reason for errors in SUM?↓
If any of the cells in the range contain error values (like #VALUE!), SUM will return that error. Use AGGREGATE or SUMIFS to ignore errors.
Does SUM work identically in Google Sheets?↓
Yes, SUM is supported in both Microsoft Excel and Google Sheets with standard evaluation behavior.