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GET /v1/convert

Cv / Kv / Av conversion

Try it live

10 free calls per day — no sign-up, no API key. Goes through the oanor gateway.

Custom headers (optional)
api.oanor.com/valveflow-api

It works. Grab an API key and use it in your project.

Get an API key

Code snippets

curl "https://api.oanor.com/valveflow-api/v1/convert" \
  -H "x-oanor-key: oanor_test_..."
await fetch("https://api.oanor.com/valveflow-api/v1/convert", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
$ch = curl_init("https://api.oanor.com/valveflow-api/v1/convert");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);
import requests
requests.get(
    "https://api.oanor.com/valveflow-api/v1/convert",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

A real response from this endpoint, captured by the latest health check.

{
    "data": {
        "cv": 11.56,
        "kv": 10,
        "note": "Cv = 1.156·Kv (Cv in US gpm/√psi, Kv in m³/h/√bar). Av = 2.4e-5·Cv (m²) is the SI flow coefficient.",
        "av_m2": 0.00027744,
        "inputs": {
            "kv": 10
        }
    },
    "meta": {
        "timestamp": "2026-06-04T18:38:25.786Z",
        "request_id": "753ad63a-55bc-4b92-b757-d9fd53f1db28"
    },
    "status": "ok",
    "message": "Cv/Kv conversion",
    "success": true
}