Business Calculators
Understand costs, prices, tax, and the numbers behind everyday decisions.
Business & Everyday tools
Profit Margin Calculator
Find gross profit, margin, and markup from cost and selling price.
Business & EverydaySales Tax Calculator
Add tax to a net price or extract included tax from a gross price.
Business & EverydayMarkup Calculator
Calculate a selling price by applying a markup to cost.
Business & EverydayBreak-Even Calculator
Estimate the whole-unit sales needed to cover fixed and variable costs.
Business & EverydayROI Calculator
Calculate net return and return on investment from total cost and proceeds.
Business & EverydayRecommended calculators
Separate pricing, cost recovery, and investment returns
Profit Margin measures profit as a share of revenue; Markup compares profit with cost. Both offer reverse pricing calculations. Sales Tax adds, extracts, or solves a single entered rate. Break-Even explores unit costs and target profit. ROI distinguishes total return from an optional annualized holding-period result.
Why do margin and markup give different percentages?
Their denominators differ. Cost 80 and selling price 100 give profit 20: margin is 20/100 = 20%, while markup is 20/80 = 25%. Choose the tool according to the values you already know.