Free Throw Percentage Calculator

Background.

Free throw percentage is the simplest statistic in basketball: made free throws divided by attempted free throws. Both Basketball-Reference and NBA.com's official glossary give it as FT / FTA with no adjustments of any kind. What this calculator adds is the question people actually ask after seeing the number — how do I fix it? Alongside the percentage you get the count of misses, the points those misses cost (exactly one each, since NBA Rule 5 scores a free throw at one point), and a target planner that works out the smallest number of free throws you would have to make consecutively to lift your percentage to a figure you choose.

That planner is more sobering than most players expect, and it is the reason the tool is worth having. A shooter sitting at 65.7 percent on 782 attempts — Giannis Antetokounmpo's 2023-24 season — needs 290 consecutive makes to reach 75 percent. On a 20-attempt sample the same ten-point improvement takes only a handful. The arithmetic is unforgiving in a specific way: the more attempts already in the denominator, the harder a percentage is to move, which is why in-season correction is so much slower than pre-season correction.

For context, the 2023-24 NBA team average was 78.4 percent. Above 90 percent over a full season is elite, the low 80s is a good guard, and below about 65 percent is the territory where opponents deliberately foul in late-game situations because the expected value of two free throws drops below what a normal possession is worth.

What is free throw percentage calculator?

Free throw percentage, written FT%, is the share of free throw attempts a player or team converts. Basketball-Reference gives the formula as FT / FTA, and NBA.com's official glossary defines it as 'the percentage of free throw attempts that a player or team has made' with the formula FTM / FTA. There are no coefficients, no adjustments and no league constants — it is the most direct statistic in the sport. Free throw attempts are counted as individual shots, so a two-shot foul contributes two attempts and a three-shot foul three, while an and-one contributes one. Each made free throw scores exactly one point under NBA Rule 5, which is why the number of misses equals the number of points left on the table. The statistic matters disproportionately relative to its share of scoring because free throws are the only completely uncontested, untimed shot in basketball and because late-game strategy turns on it: a team trailing will deliberately foul a poor free throw shooter, since two attempts at 50% produce one expected point while an average NBA possession produces about 1.15. That asymmetry is what makes free throw percentage a tactical liability rather than merely a statistical one.

How to use this calculator.

1. 01Enter free throws made and free throws attempted for whatever span you are looking at — one game, a season, or a practice session.
2. 02Count attempts as individual shots: a two-shot foul is 2 attempts, a three-shot foul is 3, an and-one is 1.
3. 03Set a target percentage. The calculator returns the smallest number of consecutive makes that would lift you to it — and returns zero if you are already there.
4. 04Read the percentage against the 2023-24 NBA team average of 78.4%. Above 90% is elite, low 80s is a good guard, and below 65% invites intentional fouling.
5. 05Check the after-ten-more-makes figure to see how much a single good practice block actually moves a season percentage. On a large sample the answer is 'barely', which is the honest argument for fixing the stroke early rather than shooting more.

The formula.

The percentage itself is FT / FTA — nothing more.

The target planner is the part with any algebra in it. To reach a target fraction t after n consecutive makes, you need (FT + n) / (FTA + n) >= t. Multiply out: FT + n >= t x FTA + t x n. Collect the n terms: n x (1 - t) >= t x FTA - FT. So n >= (t x FTA - FT) / (1 - t), and since you cannot make a fraction of a free throw the answer is the ceiling of that expression. If your current percentage already meets the target, n is zero.

The formula is undefined at t = 1, because (1 - t) is zero in the denominator — which is the algebra telling you something true: no finite number of makes can raise a percentage below 100% to exactly 100%. The calculator rejects a target of 100% and says so rather than returning an infinity.

Two properties worth noticing. First, n grows with FTA: the same ten-point improvement that takes 5 makes on a 20-attempt sample takes 290 on a 782-attempt one. A season percentage is very hard to move once the sample is large, which is a real argument for fixing mechanics in the off-season. Second, n grows sharply as the target approaches 100%, because of the (1 - t) denominator — going from 75% to 80% is far cheaper than going from 90% to 95%.

A worked example.

Frequently asked questions.

References& sources.

1. [1]Basketball-Reference.com Glossary, entry 'FT%': "Free Throw Percentage; the formula is FT / FTA."
2. [2]NBA.com official Stats Glossary, entry 'Free Throw Percentage': "The percentage of free throw attempts that a player or team has made. Formula (FTM)/(FTA)".
3. [3]NBA Official Rulebook, Rule 5 (Scoring and Timing) — a successful free throw attempt counts one point. This is the basis for the points-from-the-line and points-left-at-the-line figures.
4. [4]Basketball-Reference.com, 2023-24 NBA player totals — Giannis Antetokounmpo's season line of 514 free throws made from 782 attempts, used in the worked example.
5. [5]Basketball-Reference.com, 2023-24 NBA season summary — the League Average team row giving 1397 made from 1781 attempts, a team free throw percentage of .784, and the league-average offensive rating of 115.3 used in the intentional-fouling discussion.