Cross-border Finance

Mortgage, tax, loan, savings and return calculators with the formulas shown. Works offline after load, keeps every number on your device, and needs no account.

Cross-border Mortgage
US APR · EU nominal · Brazil TAXA. Full amortization, CSV export.
Multi-Currency Converter
16+ currencies, live rates with offline cache, fee breakdown.
Cross-border Tax Estimator
US Sales Tax · EU VAT · Brazil ICMS. Adjustable rates.
EMI Loan Calculator
Equal Monthly Installment vs principal-only plan comparison.
Compound Interest Calculator
Monthly · Quarterly · Yearly · Continuous compounding + APY.
Salary PPP Adjuster
Brazil BRL · US USD · Portugal EUR purchasing power comparison.
FIRE Retirement Calculator
Nest egg target with 4% rule and year-by-year projections.
VAT Reverse Calculator
Tax-inclusive ↔ tax-exclusive with multi-country default rates.
Inflation Calculator
Past and future purchasing power · custom rates · in-browser.
Salary Converter
Hourly ↔ monthly ↔ yearly · work hours · in-browser.
Discount Calculator
Final price, savings, % off · stack discounts · in-browser.
Dollar-Cost Averaging (SIP) Calculator
Investment value over time · monthly contribution · in-browser.
Loan Prepayment Calculator
Interest saved & term reduced · extra payments · in-browser.
Credit Card Payment Calculator
Min vs full payoff · total interest · payoff time · in-browser.
US Income Tax Calculator
Estimate your 2024 US federal income tax with full bracket breakdown, average and marginal rates. Supports single, married filing jointly and head of household with standard deduction. 100% in-browser.
Car Loan Calculator
Calculate your monthly car payment, total interest and payoff schedule from price, down payment, APR and term. Compare extra payments to save interest. 100% in-browser, no sign-up.
Property Tax Calculator
US property tax · annual & monthly · rate comparison · in-browser.
401k Calculator
401k retirement projection · employer match · compound growth · in-browser.
Mortgage Refinance Calculator
Compare your current mortgage against a refinance: new payment, total interest savings, break-even month and closing costs. 100% in-browser.
Debt Payoff Calculator
Plan paying off multiple debts with the Snowball or Avalanche strategy. See total payoff time, total interest and the order debts get cleared. 100% in-browser.
Savings Goal Calculator
Find out exactly how much to save each month to hit your goal by a target date, with interest growth factored in. 100% in-browser, no sign-up.
ROI Calculator
Calculate your return on investment: total ROI, annualized ROI (simple and compound) and profit multiple from cost and final value. 100% in-browser.
Break-Even Calculator
Find the exact number of units (or dollars) you need to sell to cover your costs, with a simple revenue-vs-cost chart and profit margin. 100% in-browser.
Fixed Deposit
Estimate a lump-sum bank deposit: maturity amount, interest earned, effective yield and date. Offline.
Rent Affordability
Reverse the 30% rule: turn gross income into a maximum rent, or a rent into the income you would need.
Emergency Fund
Set your safety-net target at 3–12 months of essential expenses and get the monthly savings plan.
Fuel Cost
Price a trip's fuel in L/100 km, km/L or US MPG: total cost, litres or gallons needed, and cost per mile.
Electricity Cost
Estimate appliance kWh and what they cost you monthly and yearly at your tariff, up to five devices.
FIRE Calculator
Estimate your FIRE number, years to financial independence and the Coast-FIRE point with a monthly simulation.
House Affordability
See the home price your income supports with the 28/36 DTI rules, PMI costs, and down-payment savings limits.