Understand, debug and structure your Excel models
Make your Excel models transparent, reliable and easy to work with, whatever the complexity. Calkin visualizes the structure, surfaces hidden risks and traces every formula dependency.
Spreadsheets drive your most important decisions, but no one sees how they fit together.
A complex workbook is thousands of linked cells across many tabs. The logic lives in the head of whoever built it, and errors are often caught too late.
No one sees the structure
Understanding how a model hangs together means clicking cell by cell. The whole picture is invisible and the knowledge sits with a single person.
Hidden errors get expensive
A broken reference, a hard-coded value or a stale link can corrupt the whole model, and is often found after the report has already gone out.
Inherited models take time
When a colleague leaves or a consultant takes over a client file, it can take hours or days to feel confident enough to edit it.
Collaboration breeds confusion
When several people work in the same model it is hard to agree on which data sources are used and how the analysis flows. That causes friction and version drift.
Lives inside Excel
Calkin is an add-in that starts automatically every time you open Excel, no new app to learn.
Your data stays local
All calculations and visualizations run on your computer. Nothing is ever uploaded.
Grows with complexity
Calkin categorizes millions of cells and becomes more powerful the bigger and more complex your files get.
How Calkin creates value in your Excel work
Less time spent understanding files, more errors caught before they get expensive, and Excel skills that grow while you work.
Calkin visualizes how each formula works, so you quickly identify and make the right changes.
Get an overview of any Excel file, however complex, and find the areas that matter.
Calkin increases the chance of catching errors and risks by up to 7× by making them clearly visible.
Contextual suggestions for more modern, efficient formulas that improve the performance of your models.
Problems
Work through the risks, errors and legacy formulas in this workbook.
Interactive: filter between categories and click a problem to see what it means.
Proactive risk detection
Calkin identifies vulnerable areas and potential errors before they become costly mistakes. Everything is gathered in an action list, grouped per sheet and sorted by how many cells are affected.
- Filter by errors, circular dependencies, hard-coded values or legacy formulas
- See how far downstream each problem spreads
- Click a problem to jump straight to the right cell
Simpler and faster formula handling
Click any cell and Calkin breaks the formula down into an interactive graph. Each node is part of the formula, like lookup_value or logical_test, and you see exactly where the value is traced.
- Each argument becomes its own node with role, reference and value
- Hover a node to highlight the matching part of the formula
- Works for everything from VLOOKUP to nested IF statements
Explain formula
Interactive: switch between VLOOKUP and IF, hover or collapse nodes.
Built for the work professionals actually do
From a quick sanity check of a client model to coordinating the analysis across an entire finance function.
Simpler formula handling
Calkin visualizes how each formula works, so you quickly identify and make the right changes.
Proactive risk detection
Calkin identifies vulnerable areas and potential errors before they become costly mistakes, saving hours of troubleshooting.
Case studyAndersen ConsultingFull visibility into structure and logic
Get a clear overview of your Excel files and understand the whole picture instantly without digging through endless cells.
Clear insights into dependencies
Understand how every cell, formula and flow interacts, so collaboration stays seamless even with the most complex files.
Case studyAkva GroupFriction-free collaboration
When everyone agrees on which data sources are used and how the analysis is done, collaboration becomes seamless.
Case studyAITAI changes fast. Understand the result just as fast
AI can rebuild large parts of a workbook in seconds, with a confidence that makes you not question it. The problem isn't the change, it's that you're left with a file you don't recognize. Calkin gives a direct overview of how the workbook fits together, so you can verify in minutes instead of an hour.
- See which tabs reference which, at a glance
- Find tabs that are no longer linked from anything
- Spot formulas pointing at cells or ranges that no longer exist
AI added 4 tabs
Budget 2024.xlsx, mapped in 2 minutes
Data.xlsx
FX-kurser
Q1
Q2
Summering
Recommended by Sweden's only Microsoft MVP in Excel.
Your file content never leaves your computer
We keep your personal data safe. All calculations run locally on your device, and the content of your files stays where it belongs, on your computer.
Calculations run locally
All analysis happens on your device, inside Excel. Nothing is calculated in the cloud.
File content stays put
Sheet and file names, values and formulas are analyzed locally, they never leave your computer.
No content uploaded
Calkin never uploads your spreadsheets or their data to any server.
Round-the-clock support
Email support within 24 hours, plus a dedicated account manager on Enterprise.
The choice for serious Excel users
From global consultancies and finance teams to Sweden's oldest university.
Full control over your spreadsheets
See how Calkin helps you understand, fix and finally trust your Excel files.