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Percentage Points Calculator

Tell percentage points apart from percent change.

How it is calculated

Enter a starting percentage A and an ending percentage B. The tool reports two numbers. The gap in percentage points is B − A, a plain subtraction that stays in "points". The relative change is (B − A) / |A| × 100, the same gap expressed as a percentage of the starting value. Both are shown with two decimals, a negative sign means a decrease, and A is echoed back as a percentage. A cannot be 0, because a relative change from zero is undefined, and the tool returns no result in that case. Values are not limited to 0–100, and a negative A is divided by its absolute value.

Worked example

A poll shows support for a measure falling from 12% to 9%. Gap: 9 − 12 = -3.00 pts, so support dropped by 3 percentage points. Relative change: -3 / 12 × 100 = -25.00%, meaning support lost a quarter of its original size. Both statements are true, but they say different things. "Down 3 points" describes the absolute move, while "down 25%" describes how large it is compared with where it started.

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Common mistakes

  • Saying "3%" when the change is 3 percentage points. A drop from 12% to 9% is -3 points, but it is a 25% relative decline, not 3%.
  • Entering the second percentage as the change itself. Both fields hold the actual rates (12 and 9), not the difference.
  • Dividing by the wrong base. The relative change is measured against the starting value A; swapping A and B turns -25% into +33.33%.
  • Starting from 0%. A = 0 gives no result because any relative change from zero is infinite; use the percentage-point gap alone there.

About this calculator

A percentage point and a percent change sound similar but measure very different things, and mixing them up is one of the most common errors in reading financial and political news. If an interest rate moves from 5% to 7%, that's a 2 percentage point increase (simple subtraction) but a 40% relative increase (the 2-point gap divided by the original 5%, expressed as a percentage).

This calculator takes two percentages and reports both figures side by side — the flat percentage-point gap and the relative percent change — so the difference is impossible to confuse. It's especially useful for interpreting interest rate announcements, unemployment or inflation figures, survey and polling results, or any headline that quotes a shift in percentages, where the two measures can tell very different stories about the same move.

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Comments (1)

  • Editorial team

    Which figure to quote depends on what your reader cares about. For rates and polls, points show the real shift and are hard to misread. For something like a conversion rate, relative change tells the story: 2 percent to 3 percent is only 1 point but a 50 percent jump. If a headline confused you, post both percentages from it and say which version you think the writer meant.

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