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Free Online Excel Formula Helper - ATools

Library of common Excel formulas with syntax, examples, and a simple interactive picker.

View source on GitHub
Free online Excel formula helper with a curated library of common functions such as SUM, IF, VLOOKUP and INDEX/MATCH. Each entry includes syntax, a short explanation and a practical example so you can build formulas faster without digging through documentation. Runs entirely in your browser with zero uploads, ideal for privacy‑sensitive spreadsheets and everyday productivity.
Excel Formula Helper
8 built-in formula templates
Formula details
=SUM
Syntax
=SUM(number1, [number2], ...)
Description

Sums a range of numbers.

Category
Statistics
Example

Example: =SUM(B2:B10) calculates the total sum from B2 to B10.