Third Down and Red Zone Conversion Calculator
Third Down and Red Zone Conversion Calculator
The two American football efficiency rates everyone quotes — third down conversion percentage and what a team does once it reaches the red zone. Neither the red zone nor the counting convention behind either rate is defined by any rules body, and the page says so rather than pretending otherwise.
Third down percentage, with the red zone beside it
Two efficiency rates72 third downs converted from 200 attempts, and 55 red zone trips producing 32 touchdowns and 18 field goals
Two rates, four denominators, and no rulebook
Red zone touchdown % = red zone touchdowns ÷ trips × 100
Red zone scoring % = (touchdowns + field goals) ÷ trips × 100
- what a conversion is on third down
- gaining the distance needed for a new set of downs. It has nothing to do with scoring and nothing to do with the two-point conversion, which is also called a conversion and is a different thing entirely
- the red zone is not in any rulebook read for this page
- the term is a broadcasting and statistical convention for the area inside the opponent’s 20-yard line. Oxford Learner’s Dictionaries defines it as “(in football) the area within 20 yards of a team’s goal line”, which is why a dictionary is cited for it. The NFL’s published field-markings list names lines, pylons and arrows and does not name a red zone
- two red zone percentages, and they differ by a lot
- touchdown percentage and scoring percentage answer different questions and both are quoted as “red zone percentage”. On this page’s defaults they are 58.2 and 90.9. The page computes both and labels each
- the counting convention this page cannot resolve
- nothing read for this page settles whether a third down on which a defensive penalty gave a first down counts as an attempt, as a conversion, or as neither; nor whether a fourth-down attempt belongs in the denominator, though every source read keeps the two separate. So the page computes exactly what you enter and tells you that the numbers on your statistics page were counted by somebody whose convention it cannot see
Worked example
72 third downs converted from 200 attempts, and 55 red zone trips producing 32 touchdowns and 18 field goals
Third down: 72 ÷ 200 × 100 = 36.0%, with 128 third downs failed
Red zone touchdown percentage: 32 ÷ 55 × 100 = 58.2%
Red zone scoring percentage: (32 + 18) ÷ 55 × 100 = 90.9% — the same play, 32.7 points higher, because field goals count
Five trips produced no points at all, which is 9.1% of them, and that is the figure a reader who only saw 90.9 would never guess at
All four percentages are rates. Double every count — 144 of 400, with 110 trips, 64 touchdowns and 36 field goals — and all four are unchanged. Halve the third down attempts alone, to 100, and the third down percentage doubles to 72.0
And each refuses separately. 201 conversions from 200 attempts, 56 red zone touchdowns from 55 trips, 56 field goals from 55 trips, and 32 touchdowns plus 24 field goals from 55 trips — which is 56 scores from 55 possessions — are each withheld rather than answered
Two numbers both called the red zone percentage
| Red zone touchdown percentage | Red zone scoring percentage | |
|---|---|---|
| Numerator | touchdowns only | touchdowns and successful field goals |
| Denominator | trips inside the opponent’s 20 | the same trips |
| On this page’s defaults | 58.2% | 90.9% |
| What a high figure means | the team finishes drives with seven points | the team rarely comes away with nothing — which includes settling for three |
| What it hides | nothing much; it is the stricter measure | every field goal, so a team that never scores a touchdown inside the twenty can still read above ninety |
What a third down percentage does not distinguish
| Two seasons | Third and short | Third and long | Third down percentage |
|---|---|---|---|
| Team A: mostly manageable distances | 120 attempts, 60 converted | 80 attempts, 12 converted | 36.0% |
| Team B: mostly long distances | 40 attempts, 32 converted | 160 attempts, 40 converted | 36.0% |
| What differs | Team A faces third and short three times as often | Team B converts the long ones at 25% against 15% | identical |
Two rates in wide circulation, neither of them defined by a rules body
Two efficiency rates get quoted in every American football broadcast: what a team did on third down, and what it did once it reached the red zone. Both are simple division, and neither is defined by the NFL, the NCAA or the NFHS in anything read for this page.
“Conversion” means two different things in American football alone. A two-point conversion is the try after a touchdown taken by run or pass instead of by kick. A third-down conversion is unrelated to scoring: it is gaining the yards needed for a new set of downs. Elsewhere on this site the word names two further quantities that are neither — association football’s shot conversion, goals over shots, and field hockey’s penalty-corner conversion, goals over corners awarded. Four meanings, one word, no arithmetic in common.
The red zone is not a rule. It is the area inside the opponent’s twenty-yard line, and it is a convention of broadcasting and statistics rather than of the game. The NFL’s published list of field markings names lines, pylons and arrows and no red zone, and the league’s rulebook page returns a table of contents where the rule text should be. What can be cited is a dictionary — Oxford Learner’s Dictionaries has it as “(in football) the area within 20 yards of a team’s goal line” — which is an honest citation for a term belonging to the language rather than the rulebook. Nothing turns on it: no rule changes at the twenty.
There are two red zone percentages and they are nearly thirty-three points apart. Touchdown percentage counts only trips that ended in a touchdown; scoring percentage counts field goals too. On the figures this page opens with — 55 trips, 32 touchdowns, 18 field goals — they are 58.2 and 90.9 per cent, and both are routinely called “red zone percentage”. So the page computes both, labels each, and prints the five trips that produced nothing, which is exactly what the scoring percentage is built not to show.
The third down rate has a different problem: it averages over situations with nothing in common. Third and one and third and fifteen go into the same denominator, so a team that plays well on first and second down faces third and short far more often and converts a higher share without being any better on third down itself. The second table sets out two constructed seasons that come to exactly 36.0 per cent and differ in every way that matters. Splitting the rate by distance needs the yards to go on every third down, which is play-by-play data, so the page declines the split rather than fitting one.
And there is a counting convention this page cannot see. Nothing read for it settles whether a third down on which a defensive penalty handed over a first down counts as an attempt, as a conversion, or as neither — and the answer changes the denominator. Every source read does keep fourth-down attempts separate. So the page computes exactly the counts you enter and tells you that whoever produced them followed a convention it cannot inspect. Where two statistics pages disagree about a team’s third down percentage, this is usually why.
Where these rates lead is the field goal kicking percentage calculator for what happens when a red zone trip ends in a kick, the scoring and two-point interpreter for what each of those outcomes is worth and under whose rule, and the turnover margin and differential calculator for the other team-level number that is quoted far more confidently than it deserves.
Every figure here is arithmetic on counts a league or a statistics provider publishes. This page produces no commercial prediction of any kind, and no page in this section does.
Frequently asked questions
How is third down conversion percentage calculated?
Third downs converted divided by third down attempts, times a hundred: 72 from 200 is 36.0 per cent. A conversion means gaining the distance needed for a new set of downs, which has nothing to do with the two-point conversion after a touchdown, despite the shared word.
What counts as the red zone in American football?
The area inside the opponent’s twenty-yard line — but as a convention of broadcasting and statistics rather than a rule. No governing body’s published rules read for this page define the term, and the NFL’s own field-markings list does not mention it. Nothing in the game changes at the twenty.
Why are there two different red zone percentages?
Because two measures circulate under one name. Red zone touchdown percentage counts only trips ending in a touchdown; red zone scoring percentage counts field goals too. On this page’s defaults they are 58.2 and 90.9 per cent — nearly thirty-three points apart on identical play. The page computes both and labels each.
Does a high third down percentage mean a team is good on third down?
Not necessarily, and this is the rate’s weakness. It mixes third and one with third and fifteen, so a team that plays well on first and second down faces shorter third downs and converts more of them without being better on third down itself. Two constructed seasons on this page come to exactly 36.0 per cent and differ in every way that matters.
Why do two websites give different third down percentages for the same team?
Usually a counting convention. Nothing read for this page settles whether a third down on which a defensive penalty gave a first down counts as an attempt, as a conversion, or as neither, and that changes the denominator. This page computes exactly the counts you give it and does not pretend to know which convention produced them.
Related calculators
References
- Oxford Learner’s Dictionaries, American English. red zone — “(in football) the area within 20 yards of a team’s goal line”. A dictionary is cited because no governing body’s published rules read for this batch define the term at all: it is a broadcasting and statistical convention rather than a rule. oxfordlearnersdictionaries.com (read 15 Oct 2026).
- NFL Football Operations. NFL Rulebook, 2026 HTML edition — recorded as a NEGATIVE result rather than a source. Rule 1 Section 3 (Goal) and the whole of Rule 11 (Scoring) appear only as table-of-contents headings with no body text; the rule text that does arrive is the field markings list, the 2026 rule-change table and the penalty tables. The field markings list names lines, pylons and arrows, and no red zone. operations.nfl.com (read 15 Oct 2026).
- NFL Football Operations. NFL Video Rulebook — Scoring Plays — the league’s own summaries with section numbers. Rule 11, Section 1, Article 2: “Touchdown: 6 points”, “Field Goal: 3 points”, “Safety: 2 points”, “Try after touchdown: 1 point (Field Goal or Safety) or 2 points (Touchdown)”. Rule 11, Section 3, Article 1: “15 yards from the defensive team’s goal line for a Try-kick” and “two yards from the defensive team’s goal line for a Try by pass or run”. Rule 11, Section 4, Article 1 requires a place kick or drop kick “made by the offense”. About 2,800 characters, text not video. operations.nfl.com (read 15 Oct 2026).
- San Diego County Football Officials Association. 2022 Major NFHS/NCAA Football Rules Differences — an officials’ association’s clause-by-clause sheet for the 2022 season. On the try: NFHS has “Ball dead when kick fails or when B secures possession” and “B cannot score”, while under NCAA rules “The ball remains live as on any field goal attempt” and “B may score two points”. “A 40/25-second play clock is used” in both, but after a touchdown and the following kickoff NFHS sets 25 seconds where the NCAA sets 40; quarters are 12 minutes under NFHS and 15 under NCAA; overtime is “Equal series from 10-yard line (State Association option)” against “Equal series from 25-yard line”; hash marks “Divide field in thirds” against “60 feet from each sideline”. It arrived as flattened text with the columns run together, so only unambiguous rows are quoted. sdcfoa.org (read 15 Oct 2026).