The PriceAndProfit editors build the calculators, charts and guides on this site. Every calculator has an open formula, test cases worked out by hand and a plain explanation of what it does and does not include.
We do not publish income promises, industry averages without a source, or tax rates — where a tax rate matters, you enter your own. Corrections and suggestions are welcome at the address on the Contact page.
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Latest materials
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Guide
Price Elasticity of Demand: Formula and Pricing Use
The midpoint formula for price elasticity of demand, what elastic and inelastic mean for revenue, and why a small…
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Calculator
Discount Percentage Calculator
Find the percentage off from an original and a sale price, the sale price after a discount, or the original price behind…
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Calculator
Percentage Change Calculator
Calculate the percentage increase or decrease between two values, the plain difference, and — when both values are…
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Guide
Revenue, Profit, and Cash Flow: Three Different Numbers
Separate sales, accounting profit, and cash movements with an invoice example, an inventory purchase, and a monthly…
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Comparison
Gross Margin vs. Net Margin: What Each Includes
Follow one revenue total through gross, operating, and net profit so each margin has a clear cost scope and the same…
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Guide
Weighted Average Margin: Weight by Revenue
Calculate portfolio gross margin from revenue and cost totals, then see why averaging product margin percentages gives…