# Break-even Lead Cost Calculator

> Work out the most you can pay for one enquiry, from your margin per sale and how many enquiries turn into sales.

- Page: https://www.brandbakery.tech/tools/lead-cost-calculator
- Last updated: 2026-10-21

Breadcrumb: [Home](https://www.brandbakery.tech/) > [Tools](https://www.brandbakery.tech/tools) > Break-even Lead Cost Calculator

Work out the most you can pay for one enquiry, from your margin per sale and how many enquiries turn into sales.

## Use it

Open the tool in a browser at https://www.brandbakery.tech/tools/lead-cost-calculator. It is free and needs no signup.

## Use it from code

Work out the most you can spend per enquiry before a sale stops paying for itself: contribution per sale (₹) times the lead-to-sale rate (%).

`POST https://www.brandbakery.tech/api/tools/lead_cost` with a JSON body, or call the `lead_cost` tool on the [MCP server](https://www.brandbakery.tech/mcp).

| Input | Type | Required | Description |
| --- | --- | --- | --- |
| `contributionPerSale` | number | yes | Revenue minus variable costs per sale, in rupees, before advertising. |
| `leadToSaleRatePercent` | number | yes | Percent of leads that become paying customers. |

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Category: [Marketing](https://www.brandbakery.tech/tools/category/marketing)

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Brand Bakery is a design-first digital studio in New Delhi. Start an enquiry at https://www.brandbakery.tech/contact or email support@brandbakery.tech. This is the Markdown copy of https://www.brandbakery.tech/tools/lead-cost-calculator; the site index for language models is https://www.brandbakery.tech/llms.txt.