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Organic reach calculator

Enter the number of people who saw a post without paid promotion and the follower count. The calculator works out the organic reach rate.

Result

Organic reach rate

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This calculation is for informational purposes only and does not replace advice from a qualified professional. Formulas and rates may not fit your exact situation — double-check the figures before making decisions.

How it is calculated

Organic reach rate = reach without promotion ÷ followers × 100%. It shows what share of the existing audience saw a post with no extra spend on promotion.

On most major platforms, organic reach per follower has trended downward for years as the feed algorithm prioritizes paid content — a falling rate over time often reflects platform changes rather than content getting worse.

Because of that, organic reach is best compared against recent posts of your own and competitors' posts over the same period on the same platform — not against your own numbers from years ago, when the rules of the game were different.

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