About FinlyCalc
FinlyCalc is a growing set of fast, focused finance calculators that run entirely in your browser. The goal is simple: help you get to a clear number without friction.
What FinlyCalc is
Most money questions have a single, concrete answer. What will my monthly mortgage payment be? How much will my savings grow in ten years? What does it take to reach a goal by a set date? FinlyCalc builds one calculator for each of those questions and does it properly, with the full working shown, so you can trust the result and understand where it comes from.
What we believe
- One job per tool. Each calculator answers a single question well. No clutter, no upsell, no wall of unrelated options.
- Private by design. Every calculation runs in your browser. The numbers you type never leave your device and are never stored. See the privacy policy.
- Free and open to use. No login, no paywall, no email required. Open a tool and start.
- Honest about limits. Our tools give estimates, not advice. We say so clearly on every page. See the disclaimer.
How the numbers are produced
Each tool uses the standard, published formula for its calculation, and most pages show that formula together with a worked example so you can check the logic. We review the assumptions each year so the result reflects the current year.
Who builds it
FinlyCalc is an independent project by Crelvo, a small studio that builds software, web apps, tools, and browser games. If you have feedback or spot something wrong, the contact page tells you how to reach us. We read every message.
Start calculating
Browse the full set of free calculators, including the mortgage calculator, compound interest calculator, and retirement calculator.