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GET /v1/reynolds

Reynolds number

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

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

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Code snippets

curl "https://api.oanor.com/reynolds-api/v1/reynolds" \
  -H "x-oanor-key: oanor_test_..."
await fetch("https://api.oanor.com/reynolds-api/v1/reynolds", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
$ch = curl_init("https://api.oanor.com/reynolds-api/v1/reynolds");
curl_setopt($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/reynolds-api/v1/reynolds",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

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

{
    "data": {
        "note": "Re = v·L/ν. Pipe-flow thresholds: laminar < 2300, transitional 2300–4000, turbulent > 4000.",
        "inputs": {
            "length": 0.05,
            "velocity": 2,
            "kinematic_viscosity": 1.004e-6
        },
        "flow_regime": "turbulent",
        "reynolds_number": 99601.5936
    },
    "meta": {
        "timestamp": "2026-06-04T18:38:24.737Z",
        "request_id": "e740309f-071e-4e38-a826-a11479cf9ac9"
    },
    "status": "ok",
    "message": "Reynolds number",
    "success": true
}