AssetCalculus provides practical calculators and clear guides for money, financial decisions, and real-world math. Our calculators are free and require no signup. We built it because good decisions start with clear numbers — not spreadsheets, not guesswork.
About Sang Lee
Sang Lee is a mathematics educator and the founder and editor of AssetCalculus. He explains financial concepts, market events, and long-term investment calculations through clear numerical reasoning.
AssetCalculus provides educational and informational content designed to help readers better understand financial calculations and economic developments. It does not provide individualized financial, investment, tax, or legal advice.
Sang Lee
Founder and Editor, AssetCalculus
Why We Built This
Most investing questions come down to arithmetic — what will this be worth later, what did I actually pay, how much is this fee costing me — but the tools to answer them are often buried inside brokerage apps, locked behind signups, or scattered across spreadsheets you have to build yourself. We started AssetCalculus to put those answers one click away: no account, no email capture, no login. Just enter your numbers and get a clear result.
What We Offer
Calculators for the numbers you need right now — dividend yield, cost basis, compound interest, ETF fees, and more as we add them.
Learn for plain-English explainers on the concepts behind those numbers, Q&A for quick answers to specific investing questions, and the Blog for deeper dives and worked examples.
How We Keep It Accurate
Every calculator on this site uses standard, well-established financial formulas — the same compound interest, CAGR, and cost-basis math you’d find in a finance textbook or a CFA curriculum, not a proprietary black box. Before we publish a calculator, we test it against known worked examples and edge cases (zero values, negative inputs, extreme numbers) to make sure it fails gracefully instead of showing a nonsensical result. Our full research and fact-checking process is outlined in our Editorial Policy. If you ever spot a calculation that looks wrong, please let us know — see our Disclaimer page for contact details.
A Note on Advice
AssetCalculus provides educational tools and information only — not personalized financial, investment, tax, or legal advice. For guidance specific to your situation, consult a licensed professional. See our Disclaimer for more details.
Publisher and Editorial Responsibility
AssetCalculus is published and maintained by Sang Lee, who is responsible for the site’s calculators, explanatory guides, editorial standards, and corrections. Questions or correction requests can be sent through our Contact page or to contact@assetcalculus.com.
How We Review Calculators
- We document the formula and define the assumptions used.
- We compare financial and tax-related explanations with primary sources such as the SEC, Investor.gov, IRS, and U.S. Bureau of Labor Statistics when applicable.
- We test representative normal, zero, decimal, and boundary inputs before publication and after material changes.
- We correct confirmed errors and update pages when a source, rule, or material assumption changes.
Last editorial review: August 21, 2026.