Business & Tax Calculators
Practical arithmetic for running a business: working out what to charge, what tax applies, and what actually lands in your account. The GST tools work in both directions, so you can add tax to a quote or recover the tax already embedded in an invoice total.
GST Calculator
Add or remove GST and instantly calculate the tax amount and final price.
Markup Calculator
Calculate retail markups, profit margins, selling prices, and gross gains.
Hours to Salary Calculator
Convert hourly wage rates to annual salary packages, or work backwards instantly.