FormuladrillAbout Formuladrill
Formuladrill is Excel formula practice exercises with instant checking. It is one of the Dravari drill sites, a family of practice tools built on the same idea: the fastest way to learn a skill you use at a keyboard is to do it, on a live tool, with instant checking, until it is a reflex.
How the exercises work
Write the formula: Click a green cell and type, exactly as in Excel: point at cells with the mouse or arrows, press Enter and watch it calculate. It recalculates on changed data: The sheet is run again with different inputs, the way a real workbook gets updated. You learn why: It names the mistake: a range that stops a row short, a lookup tripped by stray spaces, numbers stored as text, a typed-in value. Hints and a worked solution follow.
Every exercise is checked automatically against the expected result, not against a fixed answer string, so a correct approach passes even when it is written differently from the reference solution. If a check ever seems unfair there is a report link under it, and reports are read.
Who makes it
Formuladrill is made and operated by Dravari, LLC, a Delaware limited liability company based in Wilmington, Delaware, USA. The sites are built and maintained by a small team; there is no outside funding and no advertising on the practice pages. Revenue comes from Pro subscriptions, which is what keeps the free exercises free.
Contact
Questions, refunds, bug reports, company training: support@formuladrill.com. We answer within one working day.
The other drill sites
- Shortcutdrill: Excel keyboard shortcuts
- Macrodrill: Excel VBA macros
- Sheetsdrill: Google Sheets
- Pivotdrill: pivot tables
- Modeldrill: financial modeling
- Journaldrill: journal entries and accounting
- Reconciledrill: reconciliations
- Ratedrill: interest and rate math
- Statisticsdrill: statistics problems
- Querydrill: SQL
- Pandasdrill: pandas
- Scriptdrill: Google Apps Script
- Clidrill: the Linux command line
- Regexdrill: regular expressions