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 ToolsWhat 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.