Business

Running a small business means constantly doing quick math under pressure, working out whether a price covers costs, how much tax to add to an invoice, or how many units need to sell before a product actually turns a profit, and getting any one of these wrong quietly eats into margin without ever showing up as an obvious mistake. This category covers pricing calculators (markup, margin, discount, break-even), tax calculators (GST, sales tax), and operational metrics (customer churn, CAC/LTV, MRR to ARR, commission structures) that founders, freelancers and small business owners reach for repeatedly. Each one is built around the exact formula it represents, margin and markup, for instance, are kept as two separate calculators specifically because they're easy to confuse and produce genuinely different numbers from the same cost and price. Whether you're setting a retail price, checking a GST-inclusive invoice total, or working out how many units you need to sell this month to break even, these calculators give an exact answer instead of a spreadsheet formula you'd otherwise have to look up and rebuild every time.