Reference Temperature Datasets & Free JSON API

Datasets

Machine-readable index: /data/manifest.json · browsable index: /data/

API

Plain HTTPS GET, Access-Control-Allow-Origin: *, so you can call it straight from a browser. No key, no signup, no rate-limit games — cache-friendly responses (s-maxage=86400) and versioned files, so pinning a version is possible.

# whole dataset as JSON
curl https://ctofconverter.com/api/ref/oven-conversions

# same data as CSV
curl https://ctofconverter.com/api/ref/oven-conversions?format=csv

# pick columns, filter rows
curl "https://ctofconverter.com/api/ref/safe-internal-temperatures?select=product,min_fahrenheit&q=poultry"

# convert a value and classify it against the checked bands
curl "https://ctofconverter.com/api/ref/lookup?value=37.8&unit=c&context=body"
curl "https://ctofconverter.com/api/ref/lookup?value=180&unit=c&context=oven"

# the body dataset marks each row with the setting and the age group it belongs to;
# the lookup endpoint only applies 'home' rows unless you ask otherwise
curl "https://ctofconverter.com/api/ref/lookup?value=35.4&unit=c&context=body&setting=all"
curl "https://ctofconverter.com/api/ref/lookup?value=39.6&unit=c&context=body&person=infant"

lookup only converts and matches published rows. It never interpolates a value the dataset does not contain; if nothing matches you get matched: false. Rows about inpatient or perioperative thresholds are excluded from the default answer on purpose — a hospital escalation number is not a home triage number. person=infant|child|adult|neonate narrows the answer to the rows that apply to that age group.

Embed the chart

One script tag, no build step, no dependencies, no tracking, no cookies. It renders a table styled to match the host page (including dark mode) and links back here. See it running with three real datasets.

<script src="https://ctofconverter.com/embed/ref-chart.js"
        data-set="oven-conversions"></script>

<script src="https://ctofconverter.com/embed/ref-chart.js"
        data-set="human-body-temperature"
        data-cols="label,c_min,c_max,source"
        data-title="Published fever and hypothermia thresholds"
        data-max="10"></script>

Where the numbers come from

Each dataset file lists its own provenance: the authority, the URL, the date we checked it, and a note where sources disagree. Nothing is published that has not been checked against a primary source; when a value cannot be confirmed it is left out rather than averaged. Corrections are shipped as a new version with the date in updated, and the old files stay reachable, so a table in your app never silently changes underneath you.

If you find a number that does not match its cited source, that is a bug: mail lhqlvp@gmail.com or open an issue at github.com/Jovceo/ctofconverter. We would rather be told than be quietly wrong.

License and attribution

Datasets are CC-BY-4.0; the embed snippet and API code are MIT. One line is enough:

Temperature data: ctofconverter.com — CC-BY-4.0
https://ctofconverter.com/data-api

Attribution link must be a normal followable link (not behind a redirect farm). That is the whole condition — the point of publishing this is that people can use it, not that we collect traffic.

Medical note

The body-temperature dataset is a reference table of published thresholds, not medical advice, and it is not a diagnostic tool. It is written for software and for people building reference material. For an actual decision about a sick person — especially an infant under three months — follow the guidance of a clinician or your local emergency number, not a table. Each row states the authority it came from so you can check the original yourself.