Impact calculator

What could Hoplr mean for your municipality?

From neighbourly help and reuse to communication and local connections. Explore the annual potential for your municipality using Hoplr’s existing calculation model.

Start with your municipality

Number of residents

This model supports populations from 10,000 to 1,000,000.

Type of municipality Urban31% Rural55% Mixed39%

The percentage is the assumed share of active households.

Reference region

People per household

The region selects a starting value from the existing model. Adjust it using local data. These are not current country statistics.

No email required. Your inputs stay in your browser.

Your estimated annual impact

50,000 residents2.2 people per household31% active reach

Neighbourhood connections

Active households: 7,046
Online interactions: 479,091
In-person encounters: 43,682

Communication and participation

Views: 435,000
Participants: 5,228
Estimated media value: €15,785

Circular economy

Items given a second life: 35,820
Avoided CO₂ equivalent (kg): 1,049,500
Estimated market value: €761,156

Social cohesion

One-off exchanges: 35,820
Lasting connections: 7,863
Estimated social value: €371,444

An indication based on model assumptions, not measured results or guaranteed savings. Amounts are in euros. Do not add the categories together: activities may overlap.

Discuss the possibilities for your municipality

How is this estimate calculated?

This calculator uses reference figures from the existing Hoplr model to outline an annual scenario. Actual results depend on local participation, use and support. Figures are rounded up to whole units.

Households and reach: Population divided by household size gives the number of households. The model assumes that 31% (urban), 55% (rural) or 39% (mixed) are active.
Interactions and encounters: The model assumes 68 online interactions and 6.2 in-person encounters per active household per year.
Communication and participation: 8.7 views per resident and participants equal to 23% of households. Media value: residents × €0.1578125 + households × €0.3473125.
Reuse: 82% of in-person encounters are modelled as exchanges or reuse. Each item is assigned 29.3 kg of CO₂ equivalent and €21.25 in market value.
Social value: 18% of in-person encounters are modelled as lasting connections. Social value equals the number of one-off exchanges × €10.37.
Region and currency: The region changes only the starting household size. Valuation factors remain the same and are expressed in euros; they are not calibrated for each country. Use local data for an evidence-based business case.

Is this a full SROI analysis?

No. SROI stands for Social Return on Investment. This tool provides an initial indication of activity and social value. It does not calculate a return-to-investment ratio or adjust for what would happen without Hoplr or for other parties’ contributions.

Model and methodological background

Model figures: Hoplr. This version was updated in September 2026. The source calculator does not identify the external evidence or reference year for its original valuation factors. Use the results as a starting point for discussion.

For background on measuring and valuing social impact:

The Guide to SROI — Social Value International