Finance

Unit Price Calculator

Compare supermarket product prices by normalizing them to a common unit (per 100g, per liter, per piece, etc.). Enter products as 'name, price, quantity, unit' per line. Ranks from cheapest to most expensive per unit and shows savings vs the most expensive option.

html· HTML resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/unit-price-calculator' \
  -H 'Content-Type: application/json' \
  -d '{"products":"Cereal A, 4.99, 500, g\nCereal B, 3.49, 12, oz\nCereal C, 6.99, 750, g","compareUnit":"100g","decimalPlaces":4}'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/unit-price-calculator

Parameters

Name	Type	Required	Description
products	textarea	Yes	—
compareUnit	select	No	—
decimalPlaces	number	No	—

Response format

HTML result

JSON

{
  "result": "<div>Processed HTML content</div>",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-unit-price-calculator": {
      "name": "unit-price-calculator",
      "description": "Compare supermarket product prices by normalizing them to a common unit (per 100g, per liter, per piece, etc.). Enter products as 'name, price, quantity, unit' per line. Ranks from cheapest to most expensive per unit and shows savings vs the most expensive option.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=unit-price-calculator",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "unit-price-calculator",
    "arguments": {
  "products": "Cereal A, 4.99, 500, g\nCereal B, 3.49, 12, oz\nCereal C, 6.99, 750, g",
  "compareUnit": "100g",
  "decimalPlaces": 4
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

Questions or issues? Contact [email protected]

Browse tools Open tool

curl -X POST 'https://api.elysiatools.com/en/api/tools/unit-price-calculator' \ -H 'Content-Type: application/json' \ -d '{"products":"Cereal A, 4.99, 500, g\nCereal B, 3.49, 12, oz\nCereal C, 6.99, 750, g","compareUnit":"100g","decimalPlaces":4}'

Name

Type

Required

Description

products

textarea

Yes

—

compareUnit

select

—

decimalPlaces

number

—

{ "mcpServers": { "elysiatools-unit-price-calculator": { "name": "unit-price-calculator", "description": "Compare supermarket product prices by normalizing them to a common unit (per 100g, per liter, per piece, etc.). Enter products as 'name, price, quantity, unit' per line. Ranks from cheapest to most expensive per unit and shows savings vs the most expensive option.", "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=unit-price-calculator", "command": "", "args": [], "env": {}, "isActive": true, "type": "sse" } } }

{ "jsonrpc": "2.0", "id": 2, "method": "tools/call", "params": { "name": "unit-price-calculator", "arguments": { "products": "Cereal A, 4.99, 500, g\nCereal B, 3.49, 12, oz\nCereal C, 6.99, 750, g", "compareUnit": "100g", "decimalPlaces": 4 } } }