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Free Nonprofit Tools & Calculators

Fundraising and financial calculators for charity directors, fundraisers, grant managers, and trustees. Donor acquisition costs, retention rates, overhead ratios, grant budgets, and volunteer value - tools that prove impact and keep funders confident.

20+Free Tools
Charity/Foundation/NGOAll Types
100%Free & Instant
50+Languages
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Nonprofit calculators that prove your impact

The fundraising ROI calculator gives net income per £1 raised across channels, accounting for full fundraising costs including staff time - the real metric funders want to see. The donor retention rate calculator shows revenue impact of a 5% retention improvement, which is almost always cheaper than acquiring new donors.

Our gift aid calculator gives the total gift aid reclaim from any donation amount including the 25% basic rate top-up. For government tools, see our Government tools. For social services tools, see our Social Services tools.

Nonprofit Tools - FAQ