Math & Numbers
pH Calculator
Convert between pH, [H+], pOH and [OH-], or compute pH from a strong acid/base concentration, including dilution.
json· JSON resultOpen tool
Quick start
Call this tool from your code in three languages.
cURL
curl -X POST 'https://api.elysiatools.com/en/api/tools/ph-calculator' \
-H 'Content-Type: application/json' \
-d '{"mode":"convert","inputQuantity":"ph","inputValue":3,"acidBase":"acid","protonCount":1,"concentration":0,"v1":0,"v2":0,"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/ph-calculatorParameters
| Name | Type | Required | Description |
|---|---|---|---|
| mode | select | No | — |
| inputQuantity | select | No | Which of the four quantities you are entering. |
| inputValue | number | No | Numeric value of the selected input quantity. |
| acidBase | select | No | — |
| protonCount | number | No | Number of H+ per acid molecule (HCl=1, H2SO4=2) or OH- per base unit (NaOH=1, Ba(OH)2=2). |
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-ph-calculator": {
"name": "ph-calculator",
"description": "Convert between pH, [H+], pOH and [OH-], or compute pH from a strong acid/base concentration, including dilution.",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=ph-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": "ph-calculator",
"arguments": {
"mode": "convert",
"inputQuantity": "ph",
"inputValue": 3,
"acidBase": "acid",
"protonCount": 1,
"concentration": 0,
"v1": 0,
"v2": 0,
"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]