# Calculations

## Perform a Calculation

 - [POST /v2/calculations](https://docs-v2.squake.earth/docs/openapi/calculations/post-calculations.md): The calculations endpoint can calculate carbon emissions for one or multiple activities. The carbon footprint or your journey consisting of, for example, a return flight, two cab rides, and a hotel stay can be computed all at once, passing all five activities in the items array.
Include the string literal "items" in the "expand" array to retrieve values for each item separately in addition to the total carbon quantity.


This is a low-latency endpoint. SQUAKE does not provide you with a unique identifier for any calculation results. You must quote a price on the pricing endpoint to purchase compensation for your carbon emissions.


Some data sets are extensive and thus documented separately here.