Calculator categories
Finance
Mortgage, loans, deposits, interest, ROI, taxes. 6 free calculators with the formula, worked examples, and FAQ on every page. All math runs in your browser — nothing is sent to a server.
Mortgage calculator
Monthly payment, total paid, and total interest for a fixed-rate loan
Discount calculator
Sale price and savings amount from original price and discount %
Compound interest calculator
Future value of a deposit with optional monthly contributions and configurable compounding frequency
Salary converter
Convert between yearly, monthly, biweekly, weekly, daily, and hourly pay
Loan calculator
Monthly payment, total cost, and interest for any fixed-rate loan term in months
Sales tax / VAT calculator
Add tax to a net amount or extract the tax already inside a gross amount (US sales tax or EU VAT)