Charity Compound Impact Calculator
Enter your annual donation, the time frame, the return and the impact multiplier.
Total impact units
β
Enter values above
Total donated
β
Value if invested
β
Investment growth
β
Impact from growth alone
β
Growth as % of value
β
Worked example
With the default inputs shown below, this calculator returns the following results:
| Input | Value |
|---|---|
| Annual donation ($) | 5000 |
| Years | 20 |
| Return on funds before spending (%) | 7 |
| Impact multiplier (units per $1) | 2 |
| Result | Value |
|---|---|
| Total impact units | 438,651.8 units |
| Total donated | $100,000 |
| Value if invested | $219,326 |
| Investment growth | $119,326 |
| Impact from growth alone | 238,651.8 units |
| Growth as % of value | 54.41% |
Values shown are produced by this page in your browser; change any input to update them.
How to use the Charity Compound Impact Calculator
- Annual donation ($) β default 5000
- Years β default 20
- Return on funds before spending (%) β default 7
- Impact multiplier (units per $1) β default 2
- Press Calculate to update the results instantly.
Frequently asked questions
No. It models what happens when a charity invests funds it holds before spending them, for example an endowment or a multi-year programme. Giving sooner still delivers impact sooner, which most donors value more.
A simple way to express units of outcome per dollar spent β meals provided, vaccines delivered, trees planted. Enter the figure your chosen cause reports so the comparison is meaningful.
It depends on the mission. Many foundations run endowments, but screening out investments that conflict with the cause β tobacco for a health charity, for example β is standard practice.