MonsiTools
Build calculators in plain words. Chain them into workflows.
MonsiTools lets you build a calculator by typing the formula in plain words, for example "price - product cost - shipping".
It comes with ready-made calculators for ecommerce fees, margins, VAT, SaaS metrics, loans and payroll. You can chain calculators into workflows so one result feeds the next, embed any calculator on your own site, or call them from an AI assistant through the MCP server and API.
Every tool has a limited free allowance (15 uses without an account, 25 a month signed in), with a paid Premium plan beyond it.
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December 15, 2026
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