# ee.FeatureCollection.aggregate_sum

Aggregates over a given property of the objects in a collection, calculating the sum of the values of the selected property.

<br />

| Usage | Returns |
|---|---|
| `FeatureCollection.aggregate_sum(property)` | Number |

| Argument | Type | Details |
|---|---|---|
| this: `collection` | FeatureCollection | The collection to aggregate over. |
| `property` | String | The property to use from each element of the collection. |

## Examples

### Code Editor (JavaScript)

```javascript
// FeatureCollection of power plants in Belgium.
var fc = ee.FeatureCollection('WRI/GPPD/power_plants')
             .filter('country_lg == "Belgium"');

print('Sum of power plant capacities (MW)',
      fc.aggregate_sum('capacitymw'));  // 13288.600000000002
```
Python setup

See the [Python Environment](https://developers.google.com/earth-engine/guides/python_install) page for information on the Python API and using
`geemap` for interactive development.

```python
import ee
import geemap.core as geemap
```

### Colab (Python)

```python
# FeatureCollection of power plants in Belgium.
fc = ee.FeatureCollection('WRI/GPPD/power_plants').filter(
    'country_lg == "Belgium"')

display('Sum of power plant capacities (MW):',
      fc.aggregate_sum('capacitymw'))  # 13288.600000000002
```