About Finance Calc App
Finance Calc App is a free suite of 20 financial calculators built to be fast, accurate, and completely private — every calculation runs in your browser, nothing is sent to a server.
Why we built this
Most financial calculators online are either buried behind paywalls, cluttered with dark patterns, or give numbers without any explanation of how they were calculated. We wanted something different: straightforward tools that show their working, cite their data sources, and respect your privacy.
What makes us different
- Multi-region. Real tax brackets for the US, UK, Canada, and Australia — not just US-centric. Switch region in the top-right corner and every calculator updates.
- Private by design. Calculator inputs never leave your device. The Net Worth Tracker stores data in your browser's localStorage only. No account required for anything.
- Transparent methodology. Every tax calculator shows its tax year and links to the official source. If a bracket is wrong, we want to know.
- Free forever. Ad-supported so we can keep all tools free with no feature-gating.
Our calculators
We cover five categories:
- Mortgages & property — mortgage payments, affordability, refinancing, rent vs. buy, home improvement ROI
- Loans & vehicles — loan repayment, debt payoff strategies, lease vs. buy
- Tax & pay — income tax, paycheck, freelancer take-home, capital gains, crypto tax
- Savings & growth — compound interest, retirement, FIRE, inflation
- Everyday tools — live currency converter, tip & bill split, net worth tracker
Accuracy and limitations
We update tax tables annually and cite the official source for each jurisdiction. That said, tax law is complex — our calculators use standard deductions and simplified models that may not reflect your exact situation. Always verify figures with a qualified professional before making financial decisions. See our disclaimer and terms of service for full details.
Feedback and corrections
Found a bracket that's out of date? A calculator that gives wrong results? Please get in touch — we take accuracy seriously and will fix errors quickly.