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Terms of Service

Updated 2026-05-12 19:00

The tools and content on Sponge are provided for general informational purposes. Results should be reviewed before making business, financial, tax, or legal decisions.

By using the site, you agree not to misuse the tools, interfere with service availability, or copy the site in a way that violates applicable law.

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Calculate profit, cost, and margin for ecommerce, Shopify, Amazon, Etsy, or independent store products.

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Calculate ROI percentage and net return from revenue and investment cost.

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Calculate net price, VAT amount, and gross price using a VAT rate.