Excel Formula Helper
Find formulas by problem-first search and generate both Excel and Google Sheets versions with clear field hints.
Pick a formula card from the left list to see required parameters and generated formulas.
Parameters
Google Sheets Formula
Search your task
Type a formula name, keyword, or real-world problem to find the right formula quickly.
Fill required fields
Provide ranges, criteria, and index values based on the selected formula.
Generate and copy
Generate both Excel and Google Sheets formulas, then copy the one you need.
When should I use this tool?
Use it when you know the spreadsheet task but do not remember exact formula syntax.
Can I search by formula name or keyword?
Yes. Search terms like VLOOKUP, TEXTJOIN, lookup, date difference, or IFERROR all work.
Are Excel and Google Sheets formulas always the same?
Many are similar, but version and platform differences exist. The tool shows both outputs and notes differences.
Should I enter cell references or text values?
Use cell/range references for dynamic data. Wrap fixed text values in double quotes.
Do you store my input data?
No. Formula search and generation run in the browser, and your data is not uploaded.
Timestamp
Unix Timestamp
Timezone
2026-06-15
Timezone and Unix Timestamp Management: Strategies for Consistent System Architecture
Dive into the mechanics of timestamp and timezone processing, from the cross-platform nature of Unix Timestamp to the standardization of ISO 8601, to build precise time management strategies.
Plain Text Notes
Markdown
Obsidian
2026-04-15
The Plain Text Renaissance: Why More People Are Switching to Markdown for Notes
Obsidian went viral, Notion became ubiquitous, and engineers swear by READMEs — why is plain text making a comeback? This article examines the design philosophy behind Markdown and why it strikes the right balance between simplicity and structure.
Color Theory
Frontend Dev
Design Tools
2026-03-22
The Complete Color Code Guide: RGB, HEX & HSL Explained
RGB, HEX, and HSL all describe the same colors — but in completely different ways. This guide breaks down the math, the design logic, and when to use each color model, from screen design to print and accessibility.
Color Contrast
Accessibility
WCAG
2026-04-07
Color Contrast and Accessibility: WCAG Standards, Contrast Ratio Principles, and Design Improvement Tips
Color contrast ratio is a core metric in accessible web design, affecting readability for users with low vision, color blindness, and in varied lighting conditions. This guide explains WCAG 2.1 AA/AAA levels, relative luminance calculations, and common design mistakes with practical fixes.
Regular Expressions
Input Validation
String Processing
2026-03-18
Complete Regular Expression Guide: From Basics to Practical Applications
Regular Expression (Regex) is the most powerful text processing tool in modern programming. This comprehensive guide covers symbol meanings, common patterns, advanced techniques, and practical applications to help you master regex for data validation, extraction, and replacement.
Cryptographic Security
Security Defense
Key Management
2026-06-27
Cryptographic Security Implementation Workflow: From Key Lifecycle to Defense Checklist
A deep dive into cryptographic security practices. We provide a comprehensive lifecycle management process—from key generation and storage to destruction—to help developers build a robust defense checklist.