Free tool
SROI Calculator
Get a rough, illustrative Social Return on Investment ratio for your programme in under two minutes.
This tool is for illustration only. It uses simplified, representative figures and cannot produce a credible or audit-ready SROI. The result is not suitable for use in reports, funding bids, or stakeholder communications.
How much resource is going towards this initiative?
Enter the total resources being put into delivering your programme — both financial and in-kind. This becomes the denominator in your SROI calculation.
Include all direct costs: grants, contracts, staff salaries, materials, venue, overheads.
Total volunteer hours contributed across the programme. Valued at the National Living Wage (£12.21/hr, April 2025).
About this calculator
What is SROI?
Social Return on Investment (SROI) is a framework for measuring the wider social, environmental, and economic value of an activity, relative to the investment made. An SROI of £4 means £4 of social value is created for every £1 invested.
What are deadweight and attribution?
Deadweight is the proportion of outcomes that would have happened anyway without your intervention. Attribution is the share of outcomes that should be credited to other organisations or factors that also contributed. Both must be applied in a credible SROI — ignoring them inflates your ratio.
Why is this only illustrative?
This calculator applies a single average proxy value to your entire outcome category, with no stakeholder evidence, no sensitivity testing, and no independent assurance. Real SROI requires all of these. The ratio here could be materially different from a properly conducted analysis.
What does a full assessment include?
The Social Value Engine platform guides you through a complete, accredited SROI analysis: stakeholder engagement, evidence-based proxy selection, deadweight and attribution assessment, sensitivity analysis, and a transparent audit trail linking every figure to its source.
Ready for a credible SROI report?
The Social Value Engine produces fully accredited, audit-ready SROI reports trusted by 250+ organisations across the UK public, voluntary, and private sectors.
