Bowling Score Calculator

1. Enter your rolls in order, one symbol per ball.
2. Use X for a strike, the slash for a spare, and a dash or 0 for a miss.
3. Add the bonus ball or balls in the tenth frame after a strike or spare.
4. Read your total score, with strike and spare bonuses already applied.

For example, X 7 / 9 0 means a strike, then a spare, then a nine and a miss.

A bowling score is the total number of points you earn across a ten-frame game of ten-pin bowling. In each frame you roll up to two balls to knock down ten pins, except the tenth frame, where a strike or spare earns extra balls.

What makes bowling scoring interesting is the bonus system. A strike or a spare is worth more than ten points because it borrows the pins from your following rolls, so a strong finish can lift your score well beyond the pins you actually knocked down.

1. An open frame scores exactly the pins you knock down in its two balls.
2. A spare scores 10 plus the pins from your very next ball.
3. A strike scores 10 plus the pins from your next two balls.
4. The tenth frame gives one bonus ball for a spare and two for a strike.

Because bonuses reach forward into later frames, a single frame cannot be scored until those following balls are thrown. The maximum possible game, twelve strikes in a row, is 300.

Suppose you open with a strike, then knock down 7 and pick up the spare. The strike scores 10 plus the next two balls, the 7 and the spare ball, which is 10 plus 7 plus 3, or 20. The spare scores 10 plus your next ball. String enough strikes together and each one can be worth the full 30 points, which is how a perfect game reaches 300.

Strikes

Strikes are worth the most because they add your next two balls, so consecutive strikes compound quickly.

Spares

Spares still add a bonus ball, and converting spares consistently is the surest way for most bowlers to raise their average.

Splits and Opens

Leaving a difficult split, or any open frame, costs you both the missed pins and the bonus you could have earned.

The Tenth Frame

Bonus balls in the final frame mean a strong or weak finish has an outsized effect on your total.

Each frame type scores differently, which is why bonuses matter so much.

A frame can never be worth more than 30, which is why 300, or twelve strikes across ten frames, is the perfect score.

Checking a Game

Confirm a hand-kept score sheet, especially the tricky frames after strikes and spares.

Learning the Rules

See how bonuses build up so the scoring finally makes sense.

Tracking Improvement

Score practice games to watch your average climb as you convert more spares and strikes.

1. Scoring a Strike as Just 10

A strike is 10 plus your next two balls, not a flat 10, so it is easy to undercount a good game.

2. Forgetting the Spare Bonus

A spare adds your next single ball; leaving that bonus out lowers the running total.

3. Mishandling the Tenth Frame

The final frame gives bonus balls, so a strike there earns two extra rolls, not another full frame.

4. Counting Bonus Balls as New Frames

Bonus balls belong to the tenth frame and are not scored as frames of their own.

The calculator applies official ten-pin scoring exactly, including all strike and spare bonuses, so a full game total is correct. A part-finished game is scored as far as your rolls allow.

A strike scores 10 points plus the pins you knock down on your next two balls. Three strikes in a row make the first one worth the maximum 30 points.

A spare scores 10 points plus the pins from your very next single ball, so a good roll after a spare boosts that frame above ten.

The perfect game is 300, achieved by rolling twelve strikes in a row: one in each of the ten frames plus two bonus strikes in the tenth.

Type one symbol per ball: X for a strike, the slash for a spare, a dash or 0 for a miss, and the digits 1 to 9 for pins. Spaces are optional.

If you strike or spare in the tenth frame you earn bonus balls: two extra after a strike and one after a spare, so you can roll up to three times.

A turkey is three strikes in a row. It is not a separate score, but it means each of those frames borrows from the strikes that follow.

For casual bowlers, breaking 100 is a solid game and 150 is strong. League and pro bowlers routinely average well above 200.

Yes. If you enter fewer than ten frames, it scores what you have so far and notes that the game is not complete.

No. The calculator runs entirely in your browser and nothing you enter is stored or sent anywhere.

• Ten-pin bowling (Wikipedia).
• Bowling overview (Wikipedia).
• Strike in bowling (Wikipedia).