Badminton Score Projection Calculator

Work out badminton score projection instantly with clear inputs, formula shown and shareable results.

About Badminton Score Projection Calculator

Points needed are simply the target minus each score, with the rally scoring rule that at 20-20 the game continues until a two point lead, up to a hard cap of 30. The two point rule means a one point lead at 20-19 is not match point, which changes how the closing rallies should be played.

Formulas

Points needed

points needed = target - current score for each player

Setting rule

from 20-20, play continues to a two point margin or until 30 points

Worked example

With the default values below, Badminton Score Projection Calculator returns Points player A still needs of 6. Change any input above and every figure here is recalculated in your browser.

Inputs used

Player A scoreminimum 0: 15
Player B scoreminimum 0: 11
Points needed to win the gameminimum 5: 21

Results

Points player A still needs: 6
Points player B still needs: 10
Current lead: 4
Situation: Player A leads

Step by step

1Values used
2Points needed
3Setting rule
4Points player A still needs= 6
5Points player B still needs= 10
6Current lead= 4
7Situation= Player A leads

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Badminton Score Projection figure worked out?

points needed = target - current score for each player. Points needed are simply the target minus each score, with the rally scoring rule that at 20-20 the game continues until a two point lead, up to a hard cap of 30.

Why does this matter?

The two point rule means a one point lead at 20-19 is not match point, which changes how the closing rallies should be played.

What do I need to enter?

Enter player a score, player b score, points needed to win the game. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.