With restaurant ratings compared side by side, the key point is simple: they measure different things. A health department grade tells you how a kitchen performed on its last food safety inspection. A guidebook star tells you what a team of professional reviewers thinks of the cooking. An online score tells you how a crowd of diners felt about their visits. None of them replaces the others, and none is a full picture. Knowing who awards each rating, and on what evidence, helps you decide how much weight to give it.
Key takeaways
- Hygiene grades come from government inspectors and judge food safety, not taste.
- Guidebook stars come from professional reviewers and judge the cooking.
- Online scores average many diners’ opinions and can be distorted by fake reviews.
- A great kitchen can have a weak inspection, and a spotless one can serve dull food.
- Read each rating for what it measures, then combine them.
Restaurant ratings compared at a glance
| Rating type | Who awards it | What it judges | How often it changes | Main limitation |
|---|---|---|---|---|
| Health inspection grade | City or county health department | Food safety practices on inspection day | After each graded inspection | A snapshot of one visit |
| Hygiene rating scale | Local authority inspectors under a national scheme | Hygiene standards | After each inspection | Not a guide to food quality |
| Guidebook stars | Professional reviewers working for the guide | The cooking | With each new edition | Covers a small share of restaurants |
| Guidebook value listings | The same guide’s reviewers | Good meals at modest prices | With each new edition | Selective, by design |
| Online review scores | Members of the public | Overall experience | Constantly | Open to bias and fake reviews |
Health inspection grades: food safety on the day
Many US cities and counties publish inspection results, and some turn them into letter grades. New York City is a well-known example. Its health department explains in how it scores and grades restaurants that violations earn points, and lower scores are better: 0 to 13 points is an A, 14 to 27 is a B, and 28 or more is a C.
The details matter. In New York only an A on an initial inspection is graded. If a restaurant scores worse, an inspector returns unannounced, typically within a month, and that re-inspection produces the grade. A restaurant that gets a B or C can post a “grade pending” card until it has a hearing. Points are weighted by severity: a public health hazard such as food held at the wrong temperature carries at least 7 points, a critical violation at least 5, and a general violation at least 2. Grade cards must be posted where people passing by can see them.
Our explainer on how restaurant inspection grades work covers the different systems used around the country, and our checklist of what health inspectors look for explains the violations behind the points.
National hygiene schemes: one scale for a whole country
Some countries use a single scale nationwide. In the United Kingdom the Food Hygiene Rating Scheme is run by the Food Standards Agency with local authorities and rates businesses from 0 to 5. A 5 means “hygiene standards are very good,” a 3 means “generally satisfactory,” and a 0 means “urgent improvement is necessary.” The government guidance is clear that the rating is “not a guide to food quality.”
The strength of this approach is consistency: a 4 means the same thing in two different towns. The weakness is the same as any inspection, since it reflects what an officer saw on a particular day.
Guidebook stars: professional judgment of the cooking
The best-known star system is the Michelin Guide. Britannica’s history of the Michelin company says the first Red Guide appeared in 1900 as a pocket-size aid to travel in France, started by André Michelin to promote tourism by car and so support his tire business. Its restaurant ratings single out a select few, marked with three stars, that provide “cooking worth a special journey.”
The same guide also notes restaurants that provide serviceable but inexpensive meals. That answers a different question from the stars: not how exceptional the cooking is, but how good it is for what it costs.
Guidebooks have obvious strengths. Reviewers compare many restaurants across a whole region, which no single diner can do. The limits are just as clear. Most guides cover only selected cities, they change only when a new edition comes out, and stars say nothing about hygiene or service warmth on the night you go.
Online review scores: the crowd’s verdict
Review sites and map listings let any diner leave a score. The value is volume and freshness: hundreds of recent opinions can tell you whether a place is noisy, whether portions are generous, or whether service has slipped since a change of ownership.
The weakness is trust. In August 2024 the US Federal Trade Commission announced a rule banning fake reviews and testimonials, including reviews from people who never used the business and reviews bought in exchange for payment, and undisclosed reviews from insiders such as managers. A rule cannot remove every bad review, so read the written comments rather than the average, and look for detail that sounds like a real visit. Some restaurants also use outside evaluators to check service quality, a practice explained in our article on mystery shopping at restaurants.
Frequently asked questions
Can a restaurant with guidebook stars get a poor hygiene grade?
Yes. Stars judge the cooking and hygiene grades judge food safety practices on inspection day. They are awarded by different bodies using different evidence, so one tells you little about the other.
Which rating should I trust most?
Use each for its own question. Check the hygiene grade if food safety is your concern, guidebook recognition if you want standout cooking, and recent written reviews for atmosphere and service.
Do all US cities use letter grades?
No. Inspection systems vary by state, county and city. Some publish letter grades, some use pass or fail placards, and others post detailed reports online without a summary grade.
Combine the ratings before you book
Before choosing somewhere new, look up the latest inspection result, check whether a guide you trust lists the place, and skim a few recent written reviews. Each answers a different question, and together they give you a far better picture than any single number. For more on the rules and systems behind restaurants, see our menus and standards section.
