Excel チュートリアル

Find data across tables. Look up values quickly. Organize your information without manual searching.

Unlock the power of linear regression in Excel with the versatile LINEST() function. Learn how to use LINEST() for trend analysis, forecasting, and more.

Calculate the strength of a linear relationship between two data sets. Use RSQ() to find the coefficient of determination quickly in Excel. Learn syntax, see practical examples, and troubleshoot common mistakes.

Identify all kinds of errors in your Excel formulas with the ISERROR() function.

Get the current date and time instantly in Excel with the NOW() function. Learn how to use NOW(), its syntax, and practical examples for dynamic spreadsheets.

Easily manage errors in your Excel formulas with the IFERROR() function. Learn how to use IFERROR() to keep your spreadsheets clean and professional.

Round down with precision using Excel’s FLOOR() function. Perfect for pricing, scheduling, and more.

Master the basics of the Excel SQRT() function. Learn how to use SQRT() for quick square root calculations and address common errors.

Learn to work with Excel’s AVERAGE() function, including conditional and logical variations.

Learn how to simplify your spreadsheets with LAMBDA(). Write once, reuse anywhere, and combine with other modern Excel functions.

Learn how to use the Excel COUNTBLANK() function to quickly identify and count empty cells in your data.

Learn how to use Excel’s COUNT() formula with essential tips, real-world examples, and variations like COUNTA(), COUNTBLANK(), and COUNTIF() to handle different data types and scenarios.