Financial decisions are easier to make when you can see the numbers clearly. These free browser-based finance calculators help you model loans, investments, budgets, and everyday calculations — without signing up for anything.
Loan Calculator — Calculate monthly payments, total interest paid, and total cost for any loan. Enter the principal, interest rate, and loan term. Useful for mortgages, car loans, and personal loans. Shows a full amortization breakdown.
Compound Interest Calculator — See how your money grows over time with compound interest. Enter a starting amount, annual interest rate, compounding frequency (daily, monthly, yearly), and time period. One of the most important calculations for understanding long-term savings and investments.
Savings Goal Calculator — Work backward from a target amount. Enter what you want to save, by when, and at what interest rate, and the calculator tells you how much to set aside each month.
Debt Payoff Calculator — Model the payoff timeline for any debt with two strategies: avalanche (highest interest first, mathematically optimal) and snowball (smallest balance first, psychologically motivating). Compare both approaches side by side.
Rent vs Buy Calculator — One of the most consequential financial decisions most people make. This calculator compares renting and buying over a chosen time horizon, factoring in property appreciation, mortgage costs, investment returns, and opportunity cost.
Budget Planner — Track monthly income and expenses by category. See where your money is going and identify areas to cut back. Uses the classic 50/30/20 rule as a reference framework.
Invoice Generator — Create professional invoices for freelance work or small businesses. Add line items, tax, and your details, then download as PDF. Free and with no watermarks.
VAT / Tax Calculator — Add or remove VAT from any amount. Supports any tax rate. Useful for accountants, freelancers, and anyone dealing with tax-inclusive pricing.
Salary to Hourly Converter — Convert between annual salary, monthly pay, weekly pay, and hourly rate. Accounts for hours per week and weeks per year.
Crypto Profit Calculator — Calculate profit or loss on any cryptocurrency trade. Enter buy price, sell price, quantity, and fees to see your net gain and ROI.
Tip Calculator — Calculate tips and split the bill among any number of people. Shows the per-person total including tip.
All calculators are free, private, and run entirely in your browser. No account needed.