How we calculate the safety score
On GlutenFreeMap every venue shows a gluten-free safety score from 0 to 100. We want to be transparent about what it means —and what it does not yet mean— so you can use it wisely.
What the score is
It is a 0–100 orientation about how suitable a venue is for celiac people; it is not a medical guarantee or a certification. It helps you prioritise and compare, but the final decision is always yours and the restaurant's.
How the base is set
Most listings were imported from trusted sources, mainly celiac associations. We assign each source a base tier according to its credibility (for example 25, 50 or 75), and every venue inherits its source's tier. Venues reviewed manually or submitted by users get their own audit base.
How it improves over time
The score is not static. Community votes adjust it through a formula that gives more weight to more reliable input: a vote counts for more when it comes from a registered member with a good track record or includes proof (a comment or checklist), and for less when it is anonymous. As a safety-first bias, a bad experience weighs more than a good one —for a celiac, a cross-contamination mistake matters more than an uneventful meal— and recent votes count more than old ones. Early on the per-source base leads, so today many listings still show that provisional value while they await more feedback; we say so openly. As trustworthy votes accumulate, the community's voice takes over and the map gains precision.
Our sources
We credit and link the associations and organisations whose work feeds our database.
See all sourcesOpenStreetMap data
Some location data comes from OpenStreetMap, © OpenStreetMap contributors, available under the ODbL licence. OpenStreetMap · ODbL