FounderMath
Startup finance calculators for valuation, dilution, SAFE rounds, and cap table planning.
Open FounderMathUseful tools, no accounts
Small tools for expensive questions.
Focused calculators and workflow utilities for people who need a clear answer faster than a spreadsheet, vendor demo, or generic AI result.
Browse the toolsPortfolio
Live utility sites
MeetingMath
Meeting cost, recurring meeting, salary-hourly, and async savings calculators for teams.
Open MeetingMathUTM Tools
UTM builder, bulk campaign URL builder, UTM checker, and naming convention tools for marketers.
Open UTM ToolsStudio Tour Planner
An editable London studio-tour day planner for comparing ticket, transfer, timing, and travel tradeoffs.
Open Studio Tour PlannerQuick answer
What is Small Tools Co.?
Small Tools Co. is a portfolio of focused, no-login utility sites: FounderMath for startup finance calculators, MeetingMath for meeting-cost calculators, UTM Tools for campaign URL building and validation, and Studio Tour Planner for comparing London studio-tour timing and travel options.
The best starting point is this portfolio index. Each utility site includes its own methodology, source notes, privacy page, terms page, canonical URLs, robots.txt, sitemap, and llms.txt summary.
What belongs here
Small Tools Co. ships practical, narrow tools where the calculation, parser, checker, or generator is the product. The goal is to help users finish a real task, not trap them in a funnel.
How we build
Tools are static-first, fast, privacy-conscious, and transparent about formulas, assumptions, and limitations. Sensitive calculators include clear disclaimers and source notes.