How to use (3 steps)
- Define what you need first: future value, present value, payment, or investment evaluation.
- Align rate basis and period (APR/EAR, annual/monthly) with Rate conversion.
- Use RATE Solver when rate is unknown and you need to back-solve it from payment, PV, FV, and term.
Recommended (top 3)
NPV/IRR
Evaluate cash flows with NPV and IRR together for decision support.
Rate conversion
Convert APR/EAR and annual/monthly/daily rates to unify assumptions.
Calculators
- TVM Solver (PV/FV/PMT/NPER/RATE) — Loan & Investment.
Solve PV, FV, PMT, NPER, and RATE in one place. Supports loan/investment modes, APR/EAR output, CSV export.
- XIRR Calculator (Irregular Cash Flows) – Paste CSV.
Calculate XIRR from irregular dated cash flows online.
- XNPV Calculator (Dated NPV for Irregular Cash Flows).
Calculate XNPV for irregular dated cash flows online.
- Simple & Compound Interest, NPV & IRR Calculator.
Compare simple and compound present/future values alongside cash-flow NPV and IRR.
- NPV profile chart – sweep discount rates and visualise IRR.
Generate an NPV profile by sweeping discount rates.
- Interest Rate Converter (APR, APY/EAR, monthly, daily).
Convert APR to APY/EAR and monthly or daily rates, or run the reverse conversion to compare loans, cards, and savings.
- Interest Rate Calculator (RATE) — Solve APR from Payments.
Solve interest rate from loan amount, payments, and term (Excel RATE equivalent).
- Loan calculator (monthly payment, interest, payoff).
Calculate monthly loan payment, total interest, and payoff timeline from principal, APR, and term.