Finance
Loans, mortgages, investments, taxes, and everyday money math.
31 calculators in this category.
- Mortgage Payment
Calculate your monthly mortgage payment, total interest, and full amortization. Free, accurate, and works in any currency.
- Mortgage Affordability
Estimate the maximum home price you can afford based on your income, debts, down payment, and interest rate. Uses the standard 28/36 rule.
- Refinance
See if refinancing your mortgage saves money. Calculates new payment, monthly savings, total interest savings, and break-even time.
- Loan Calculator
Calculate monthly payment, total interest, and total cost for any fixed-rate loan. Works for personal, auto, student, and small-business loans.
- Auto Loan
Calculate monthly car payment, total interest, and total cost. Supports trade-in, sales tax, and down payment.
- Compound Interest
See how money grows over time with compounding. Enter principal, rate, time, and optional monthly contributions to project future value.
- Simple Interest
Calculate simple interest on a loan or deposit. Returns interest amount, total, and effective rate.
- Inflation
Calculate what an amount of money in one year is worth in today's dollars, using a configurable inflation rate.
- APR ↔ APY
Convert between APR (annual percentage rate) and APY (annual percentage yield). Critical for comparing loans and savings accounts.
- Debt Payoff
Compare debt payoff strategies: snowball (smallest balance first) versus avalanche (highest rate first). See total interest and payoff timeline.
- Credit Card Payoff
See how long it takes to pay off a credit card balance and how much interest you'll pay. Compare minimum payments versus a fixed monthly amount.
- Retirement
Estimate your retirement number using the 4 % rule, and project whether your current savings + monthly contributions will get you there.
- Emergency Fund
Calculate the right size for your emergency fund based on monthly expenses, family situation, and job security.
- ROI
Calculate return on investment as a percentage and annualized return. Compare investments fairly by adjusting for the holding period.
- Rent vs Buy
Compare the long-run cost of renting versus buying a home over a chosen number of years. Includes mortgage interest, property tax, maintenance, and investment opportunity cost.
- Down Payment
Calculate how long it'll take to save for a down payment on a home, factoring in your current savings, monthly contribution, and investment return.
- Savings Goal
Calculate how long until you reach a savings target, or how much to save monthly to hit it by a target date.
- College Savings
Project college savings growth with tuition inflation. Models 529 plans and shows monthly contribution needed to fund a 4-year degree.
- Tax Brackets
Estimate US federal income tax owed for 2026 using the official IRS brackets. Marginal vs effective rate shown.
- Salary Converter
Convert between hourly, weekly, biweekly, monthly, and annual pay. Handles full-time, part-time, and freelance hours per week.
- Hourly Net Pay
Estimate your real take-home hourly rate after taxes. Useful for comparing freelance rates against W-2 salary positions.
- Tip Calculator
Calculate tip amount, total bill, and per-person share split across any number of people. Works for any currency and tip percentage.
- Sales Tax
Calculate sales tax, VAT, or GST on any purchase. Works two ways: add tax to a price, or back out the pre-tax price from a total.
- Discount
Calculate sale price after percentage discount, or work out the original price from a sale price. Handles stacked discounts too.
- Currency Converter
Convert between major world currencies using live exchange rates from the European Central Bank, updated daily.
- Crypto P&L
Calculate cryptocurrency profit, loss, and ROI from entry price, exit price, position size, and trading fees.
- Solar Payback
Estimate years to payback for a residential solar PV system based on system cost, annual production, electricity rate, and rate inflation.
- Cost of Living
Compare cost of living between cities using purchasing-power-parity (PPP) factors. See what salary you'd need to maintain your standard of living.
- Wedding Budget
Estimate wedding costs by guest count and style, with category breakdown (venue, catering, photography, attire, flowers).
- Childcare
Estimate annual childcare cost by care type and city tier. Compares daycare, nanny, au pair, and family-shared arrangements.
- Sales Commission
Calculate commission earnings on flat-rate, tiered, and revenue-share structures. Useful for sales reps and managers planning quotas.