offlinewebtools.com — free, watermark-free browser tools that stay on your device with nothing uploading to our servers

Margin, Markup & Markdown Calculator

Calculate profit margins, markup percentages, and understand the differences

Free to use, no watermarks, runs in your browser—nothing uploads to our servers

Cost (Purchase Price) ($)

Selling Price ($)

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If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.