Driven by curiosity, built for understanding
Make sense of finance through practical tools
Ask a question, explore the numbers, and understand the reasoning behind the result. Every tool includes the formulas, assumptions, sources, and limitations that matter.
Explore knowledgeStart with tools
For learning only. Not investment advice.
Financial tools and documented methods
ETFResearch
Inspect a fund's records, compare exposures, and understand the data behind each result.
- Fund profiles
- Overlap
- Stock exposure
First prototype in development · More tools planned
ETF Research Profile
Inspect SPY daily records, the data contract, and current data caveats.Prototype in development
ETF Compare
Compare overlap, shared holdings, and weight differences across funds.In development
Stock Exposure
Find which supported ETFs hold a company and at what weight.Planned
FinancialCalculators
Work through financial questions with the inputs, formula, assumptions, and result shown together.
- Investing4
- Savings3
- Retirement1
- Loans & Debt1
- Mortgage1
- Income1
- Taxes1
- Business1
Common formulas
Visual reference
- Future value
FV = PV × (1 + r)ⁿ - Annual growth
CAGR = (FV / PV)¹⁄ⁿ − 1 - Loan payment
PMT = P × r(1+r)ⁿ / ((1+r)ⁿ − 1) - Savings rate
Savings / Income
Calculator directory
13 scoped- Fee Impact
- Compound Interest
- CAGR
- Dividend Yield
- Rule of 72
- Inflation
- Savings Goal
- Retirement Savings
- Loan Payment
- Mortgage Payment
- Salary to Hourly
- Income Tax
- Profit Margin
Planned catalog · Tools will open as they become available