Impact, activity and responsiveness

Actions, however big or small, and taking initiative are core Olio values. Your impact screen is your data centre and here you can learn more about how we calculate these statistics.

Impact screen

How do you calculate “People shared with”?

This is the total number of Olioers you’ve had a share with. A share is counted whenever it is confirmed that a share is taking place in the messaging thread between two users for a particular listing.

How do you calculate “Meals saved”?

Meals saved is calculated when you give away a food listing. The average personal food item has been estimated to contain 0.774 (or 77.4%) of a meal, 

  • We've considered a meal to be 0.42 kg (420g) of food 
  • On average, each item in a personal Olio food listing contains 0.325kg (325g) of food

The estimated impact per Food Waste Hero items varies depending on the business from where the food was collected.

How do you calculate CO2 Saved?

CO2 saved is also calculated when you give away a food listing.

  • For every 1 KG of food that is given away, we calculate a saving of 4.3182kg of CO2 for the environment.
Our calculation assumes both upstream and downstream diverted emissions, where 1 item shared counts for 1 item not being produced and we are not discounting for leakage or rebound effects.

How do you calculate “Water saved”?

By saving food, we also save the water that was used to grow and process that food. Based on data from a WRAP report "The water and carbon footprint of household food and drink waste in the UK", the average personal food item requires 196 litres of water (this is calculated via sampling analysis).

The estimated impact per Food Waste Hero item varies depending on the business from where the food was collected.

How do you calculate non-food impact?

The average non-food listing shared in the Free section of Olio saves an estimated 7.71kg CO2eq. This is based on the estimated impact per item for three popular non-food categories: books and magazines; children’s clothes; and adult clothes. These categories were labelled as small, medium, and large. All other categories were also labelled as small, medium, and large, with the corresponding impact applied to them.

What is "money saved" and how is it calculated?

Your money saved on the impact page will go up when you collect Free listings from another user. The average amount of money saved per pickup was calculated by analysing the value of thousands of listings and then calculating the average value of a listing. Currently, this applies to UK, Jersey & Guernsey users only. 
What is "responsiveness" and how is it calculated?
Responsiveness data is only measured for people who have added at least 1 listing. It is calculated every 2 hours to avoid sudden changes, as follows:
  • After you receive a request, your first response to that message contributes to the responsiveness score.
  • Replies to x % of requests - this is based on first responses to the last 11 requests received
  • Typically replies in x hours - this is calculated as the median of first response time for the last 11 requests received
  • Automatic responses (when you send a mass message to all requesters) do count as a response to each requester
  • Someone requesting from you in the middle of the night shouldn't affect your score as we use the median time for your first responses
Are non-food listings included in water saved?

No. Non-food listings vary considerably in size and material, so we are not able to provide average water saved at present.

Does “Listings offered” and “Listings received” contain both food and non-food?

Yes.  it does not include 'Wanted' listings.

Keeping impact calculations up-to-date

These impact calculations are reviewed periodically. The impact values shown on this page are those applied to all new listings added to Olio from 10 Sep 2023 onward. Different values apply to historic listings.

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