Traditional Hand Evaluation

First, count your High Card Points.

For each...count
Ace4
King3
Queen2
Jack1

If your hand is balanced (see Openings) and partner has not opened (or not had the chance to), then that's all you need consider initially. Otherwise, read on ...

Length points

Add, to the HCP, one point for every card after the fourth in each suit. For example, a seven-card suit would attract three length points.

Shortness (support) points

Do not combine with length points

Instead of counting for length, some advocate counting for shortness. Sources vary as to exactly the circumstances and value of doing so.

Add shortness points according to one of the scales in the following table:

LengthScale 1Scale 2
Void35
Singleton23
Doubleton11

Requirements for game and slam

The ranges are less clear in suit contracts, precisely because they are suit contracts.

In a suit, if you've got more than a solid game, think about slam bidding.