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We're no longer sharing our impact calculator

We’re no longer sharing GiveWell’s impact calculator.

We’ve been working to improve how we communicate impact. We’ve decided to use impact estimates based on grants that GiveWell has made from our Maximum Impact Fund or has recommended to Open Philanthropy. By using only past grants, we can share more concrete estimates of impact than if we’re trying to guess what the future impact of a donation will be.

Backward-looking estimates don’t fit well into our impact calculator design, which offered donors an estimate of what their donation will accomplish in the future. We’re looking into building alternate tools to communicate impact clearly and accurately.

To see our current estimates, and learn more about how we produce impact numbers, see How we produce impact estimates.