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API · /healthcalc-api

Health Calculator API

healthy 3,713 Subscribers

A complete health & fitness calculator suite in one API: Body Mass Index with category and healthy-weight range, Basal Metabolic Rate (Mifflin-St Jeor and Harris-Benedict), Total Daily Energy Expenditure with weight-loss/gain calorie targets, macronutrient splits (balanced, low-carb, high-protein, keto, endurance) with fibre, U.S. Navy body-fat percentage, ideal body weight across four classic formulas (Devine, Robinson, Miller, Hamwi), and daily water intake. Every endpoint accepts GET query parameters or a JSON POST body and works in both metric and imperial units. All computation is done locally with established public-domain equations, so responses are instant and the service is always available. Ideal for fitness trackers, nutrition apps, telehealth and wellness dashboards.

#health #fitness #bmi #calorie #nutrition #calculator
api.oanor.com/healthcalc-api
Get an API key Try in playground → Contact provider

Machine-readable spec so AI agents can integrate this API.

/api/healthcalc-api/openapi.json
/api/healthcalc-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
1474 ms
Server probes · 24h
Subscribers
3,713
active
Total calls
14
last 7 days
status Full status page → · 14 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 500 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 500 calculations/month, 2 req/s
  • All 7 calculators (BMI, BMR, TDEE, macros, body-fat, ideal-weight, water)
  • Metric & imperial units
  • No credit card
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Basic

€4.00 /month

  • 30,000 calls / month
  • 5 requests / second
  • Hard cap (429 above quota, no overage)
  • 30,000 calculations/month, 5 req/s
  • GET or JSON POST
  • Mifflin-St Jeor & Harris-Benedict BMR
  • Commercial use, email support
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Pro

€12.00 /month

  • 250,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 250,000 calculations/month, 15 req/s
  • Goal-based calorie & macro targets
  • U.S. Navy body-fat & 4 ideal-weight formulas
  • Priority email support
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Mega

€35.00 /month

  • 2,000,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 2,000,000 calculations/month, 40 req/s
  • High-volume for apps at scale
  • Maximum concurrency
  • Priority support
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Built by

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api.oanor.com/exercises-api

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api.oanor.com/drug-api

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Current air quality and hourly forecast for any location — European and US AQI plus PM2.5, PM10, ozone, nitrogen dioxide, sulphur dioxide, carbon monoxide, dust and UV index. Powered by Open-Meteo. Just pass a latitude and longitude.

api.oanor.com/airquality-api

Food & Nutrition API

Look up packaged food products by barcode (EAN/UPC/GTIN) and get the product name, brand, ingredients, allergens, Nutri-Score, NOVA group, Eco-Score and per-100g nutrition facts — or search the catalogue by name. Backed by the Open Food Facts database. Ideal for nutrition trackers, diet and fitness apps, grocery and retail tools.

api.oanor.com/food-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Health Calculator API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Health Calculator API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Health Calculator API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Health Calculator API cost?
Health Calculator API has a free tier with 100 calls / month. Paid plans start at €4.00 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Health Calculator API GDPR-compliant?
All requests to Health Calculator API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/healthcalc-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/healthcalc-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/healthcalc-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/healthcalc-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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