Scale length from a fret

Code snippets

curl "https://api.oanor.com/fretspacing-api/v1/scalelength" \
  -H "x-oanor-key: oanor_test_..."

await fetch("https://api.oanor.com/fretspacing-api/v1/scalelength", {
  headers: { "x-oanor-key": "oanor_test_..." }
});

$ch = curl_init("https://api.oanor.com/fretspacing-api/v1/scalelength");
curl_setopt($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/fretspacing-api/v1/scalelength",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

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

{
    "data": {
        "note": "Scale length = distance ÷ (1 − 1/2^(fret/12)). Measuring to the 12th fret is easiest: the scale length is just twice that distance. Common scales: 25.5\" (Fender), 24.75\" (Gibson), 25.4\" classical, 34\" bass.",
        "inputs": {
            "fret": 12,
            "unit": "in",
            "distance_from_nut": 12.75
        },
        "scale_length": 25.5
    },
    "meta": {
        "timestamp": "2026-06-06T07:13:57.039Z",
        "request_id": "0e1d56ea-3ef2-40b1-a242-32a2b82d450e"
    },
    "status": "ok",
    "message": "Scale length",
    "success": true
}