There’s no single number, because “urban trash bin” covers everything from a small street litter bin to a 1,100-liter communal wheelie bin or a commercial dumpster. The full weight is simply the empty bin weight plus the weight of the waste inside, and that second part depends on volume, moisture, compaction, and what people threw away.
As a rough guide, a typical 60–120-liter public litter bin might weigh about 20–60 kg when full. A 120-liter household wheelie bin often comes in around 25–45 kg full, while a 240-liter bin is more likely to be 40–80 kg. A large 1,100-liter communal bin can reach 200–400 kg when full, and compacted commercial waste can push it higher. Commercial dumpsters are in a different class: depending on size and contents, a full one can easily weigh several hundred kilograms and sometimes more than 1,000 kg.
So if you need an exact figure, don’t estimate from appearance alone. Check the bin’s rated volume, look up its empty weight, and estimate waste density—or weigh it with a suitable scale. And remember: a full urban trash bin can be much heavier than it looks, so use proper handling equipment and avoid tipping or lifting it by hand.