White belt
Spreadsheet basics
- Cells, ranges and references
- SUM, IF, SUMIF, COUNTIF
- Sorting, filtering, clean data
- 12 drills, all in the browser
Free
Spreadsheets · Slides · Business models
Master the sheets. Then the meeting.
Learn the corporate skills nobody teaches you: spreadsheets, slides and business models. Practise the basics right on this page, earn your belts, and walk into work knowing what you are doing.
No sign-up needed for the first drill. Try it →
Drill 01 · Total sales for BudapestWhite belt
| A | B | C | |
|---|---|---|---|
| 1 | Rep | City | Sales |
| 2 | Anna | Budapest | 1 200 |
| 3 | Bence | Debrecen | 800 |
| 4 | Csilla | Budapest | 950 |
| 5 | Dávid | Győr | 640 |
| 6 | Eszter | Budapest | 1 100 |
| 7 | Total for Budapest → | ||
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Follow along on TikTok: @masterthesheets
The courses
Three belts. From “what is a cell” to a model your boss trusts.
Green belt
The analyst toolkit
- XLOOKUP and INDEX/MATCH
- Pivot tables and dashboards
- Charts that make a point
- Turning numbers into slides
Coming soon
Black belt
Business modelling
- Three-statement models
- Unit economics and pricing
- Scenarios and sensitivities
- Models people can audit
Coming soon
Every belt ends with a certificate you can add to LinkedIn.
Template library
Templates that come with a teacher.
Every Pro template has a README tab, a worked example and a short walkthrough video, so you understand it, not just use it.
Break-even Calculator
Find the number of sales where you stop losing money. With a worked example.
Free
Small Business Cash-Flow Forecast
12 months of revenue, variable and fixed costs, runway and break-even month, with charts and AI prompts.
Pro
Mortgage Calculator
Full amortisation schedule, prepayments, and five scenarios side by side.
Pro
Sales Forecast
Build it bottom-up by product, then stress-test it.
Coming soon
Pricing & Unit Economics
Contribution margin, CAC payback and price scenarios.
Coming soon
KPI Dashboard
A one-page monthly dashboard your manager will actually read.
Coming soon
Excel and Google Sheets versions of every template.
How it works
Watch two minutes. Practise on the same page. Get checked instantly.
01
Watch a short lesson
One skill per video, two to five minutes. No 40-minute rambles.
02
Practise in the same window
A spreadsheet sits right next to the lesson. No switching tabs or downloading files for the basics.
03
Get checked, earn the belt
Every drill is graded instantly, with a hint when you are stuck. Finish the set, get the certificate.
Get the white belt free, plus one drill a week.
Twelve in-browser drills and the Break-even Calculator. No spam, unsubscribe anytime.
FAQ
Questions, answered.
Not for the white belt: everything runs in your browser. From the green belt on, you'll work in Excel or Google Sheets, whichever you use at work.