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Calcimator

Racquet Swing Weight Calculator

Calculate swing weight (moment of inertia) from your racquet's static weight, balance point, and length, with optional lead tape customization.

Inputs

Results

Swing weight (kg*cm²)

262.8

Total weight (g)300
Balance point (cm)32
Head-heavy/light (cm)-2.3
Maneuverability (0-100)95
Stability (0-100)5
Power potential (0-100)75.1
How to Use This Calculator
  1. Enter Racquet weight (grams), Balance point (cm from butt), and Racquet length (cm).
  2. Set Added weight (grams) and Added weight position (cm from butt).
  3. Review the Swing weight (kg*cm²) result.
  4. Use Total weight (g) and Balance point (cm) to inform your decision.

How the result changes with Balance point (cm from butt)

Balance point (cm from butt)Swing weight (kg*cm²)
29225.9
32262.8
35305.1
37336.3

What each input means

Racquet weight (grams)
Unstrung weight in grams. Typical range: 255-340g.
Balance point (cm from butt)
Distance from butt cap to balance point. Head-light < 33cm, head-heavy > 34cm.
Racquet length (cm)
Standard = 68.6cm (27in). Extended = 71.1cm (28in).
Added weight (grams)
Weight of lead tape or other customization in grams.
Added weight position (cm from butt)
Where the added weight is placed. Tip = ~68cm, 3 o'clock = ~55cm, handle = ~10cm.

What each result means

Swing weight (kg*cm²)
Moment of inertia around the standard 10cm pivot point.
Total weight (g)
Static weight including any added customization.
Balance point (cm)
Effective balance point after customization.
Head-heavy/light (cm)
Positive = head-heavy, negative = head-light relative to geometric center.
Maneuverability (0-100)
How easy the racquet is to swing quickly. Higher = more agile.
Stability (0-100)
Resistance to twisting on off-center hits. Higher = more stable.
Power potential (0-100)
Momentum potential. Higher swing weight = more power on full swings.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Racquet weight (grams) = 300, Balance point (cm from butt) = 32, Racquet length (cm) = 68.6, Added weight (grams) = 0 = 5 input(s) provided
  2. Calculate Swing weight
    Swing weight = round(baseSW * 10) / 10
    262.8 = 262.8
  3. Calculate Total weight
    300 = 300
  4. Calculate Balance point
    32 = 32

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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