Key takeaway
A percentage point (pp) is an absolute unit: 1 pp = 1% of the whole scale, regardless of where you start. The distance from 40% to 41% is 1 pp. It is not a percent of anything — it is a flat step on the percentage scale, used to describe differences between rates.
Scope and assumptions
General convention. A pp measures a difference of rates, not a ratio. This site is informational and not official.
Short answer: A percentage point (pp) is an absolute unit: 1 pp = 1% of the whole scale, regardless of where you start. The distance from 40% to 41% is 1 pp. It is not a percent of anything — it is a flat step on the percentage scale, used to describe differences between rates. This page defines the unit itself; for how it differs from a percent see Percent vs Percentage Point, for pp vs percent change see Percent Change vs Percentage Points, for the gap formula see Percentage Point Difference, for the finer unit see Basis Points vs Percentage, and for the usual errors see Common Percentage Point Mistakes.
Quick navigation
- Percent vs pp → percent-vs-percentage-point
- Change vs points → percent-change-vs-percentage-points
- Basis points → basis-points-vs-percentage
- The calculator → Percentage Calculator
1. Definition
1 percentage point (pp) = 1% of the scale, as a flat unit
It measures a difference between two rates, not a share of a whole.
2. pp vs percent
| Concept | What it is | Example |
|---|---|---|
| Percent | a ratio out of 100 | 40% of a class |
| Percentage point | a step between rates | 40% → 41% = 1 pp |
3. Worked examples
| From | To | pp change |
|---|---|---|
| 40% | 41% | +1 pp |
| 10% | 15% | +5 pp |
| 50% | 45% | −5 pp |
| 2% | 3% | +1 pp |
Notice 40%→41% and 2%→3% are both +1 pp, though their relative changes differ (2.5% vs 50%).
4. Why pp exists
Describing a rate move in pp avoids ambiguity. "The rate rose 1 pp" is exact; "the rate rose 1%" is ambiguous (1% of what base?).
5. Common mistakes
- Calling a pp a 'percent' — 40→41 is +1 pp, not +1%.
- Treating pp as relative — a pp is flat, not 'of' anything.
- Adding pp to % — different units, never sum.
- Forgetting the sign — a fall is −pp.
6. Percentage points in everyday news
You meet pp whenever two rates are compared. "The rate rose 2 points" (unemployment 4% → 6%), "the margin is 5 points" (poll 48% vs 43%), "the target missed by 3 points" — all are pp, flat steps on the percentage scale. Saying "points" instead of "percent" there is exact and avoids implying a ratio. Reserve "percent" for the relative change, like the 50% rise from 4% to 6%.
7. Percentage points in a sentence
When you compare two rates, reach for "points" so the unit is exact. "The rate rose 2 points" (say 4% to 6%) is unambiguous; "the rate rose 2 percent" invites the reader to wonder whether you mean a flat 2 pp or a 2% relative move. Reserve "percent" for the relative change, like the 50% rise from 4% to 6%. One word chooses the unit, and choosing it on purpose is what keeps a rate comparison from misleading the people who read it and act on the number.
8. Say 'points' on purpose
When two rates are compared, choosing "points" over "percent" is a deliberate act that keeps the unit exact. "The rate rose 2 points" leaves no doubt that a flat 2 pp step happened; "the rate rose 2 percent" forces the reader to wonder whether you mean 2 pp or a 2% relative move. The word picks the meaning, so use it with intent. Reserve "percent" for the relative change, and the comparison says exactly one thing to every reader who sees it, with no ambiguity to resolve.
FAQ
Q: What is a percentage point? An absolute unit equal to 1/100 of the scale. 1 pp is the step from 40% to 41%.
Q: Is a percentage point a percent? No — a percent is a ratio; a pp is a unit of difference between two rates.
Q: How far is 40% to 41%? 1 percentage point.
Q: Can a pp be negative? Yes — a drop from 6% to 5% is −1 pp.
Q: When should I use pp instead of %? When describing the gap between two rates, use pp; when describing a relative change, use %.
Sources: Investopedia — Percentage Point; Khan Academy percentages.
Disclaimer: General convention. A pp measures a difference of rates, not a ratio. This site is informational and not official.
Sources and references
- Investopedia — Percentage Pointhttps://www.investopedia.com/terms/p/percentage-point.asp
- Khan Academy percentageshttps://www.khanacademy.org/math/pre-algebra/x31947de81e3f6453:percentages