About CalcFi
What is CalcFi?
CalcFi is a collection of free financial and crypto calculators available in English and Spanish. Our mission is to make professional financial tools accessible to everyone, with no registration or subscription required.
All calculators run entirely in your browser. No personal data is sent to our servers. Calculations are instant and accurate.
Methodology & Reliability
All our calculators use standard mathematical formulas used by banks and financial institutions worldwide. We do not invent proprietary methods or make estimates — we apply the exact formulas.
Mortgage & Loan
PMT = P × [r(1+r)^n] / [(1+r)^n − 1]Compound Interest
A = P(1 + r/n)^(nt)Bitcoin Profit
(Sell − Buy) × BTC − FeesDCA
Avg Cost = Total Invested ÷ Total BTCFinancial Advisor AI
The Financial Advisor AI is powered by Anthropic's Claude (model claude-haiku-4-5-20251001). It provides educational guidance on personal finance, mortgages, investments and crypto in English and Spanish.
Why trust CalcFi?
- Standard formulas used by global banking institutions
- No registration or personal data required
- All calculations run in your browser
- Available in English and Spanish
- Updated for 2026
- No intrusive ads on tool pages