* IMDb: This website provides a wealth of information about movies, including ratings from various sources.
* Rotten Tomatoes: This website aggregates critical reviews and provides a rating based on those reviews.
* Metacritic: This website also aggregates critical reviews but provides a weighted average score based on the quality of the reviews.
* Your regional film classification board: Depending on your location, there will be a board that rates movies based on their content. You can find this information on their website.
Please note that ratings and certificates can vary depending on the region.