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Calcimator

Racquet Restringing Schedule Calculator

Estimate when to restring your racquet based on playing frequency, string type, tension, and environmental conditions.

Inputs

Results

String life (play hours)

35

Weeks until restring

7.8

Days until restring55
Restrings per year7
Tension at restring point (lbs)38.5
Tension lost (lbs)16.5
Annual restringing cost ($)$280.00
How to Use This Calculator
  1. Enter Sport, Tennis, and Badminton.
  2. Set Squash, Racquetball, and String Type.
  3. Adjust Natural Gut, Multifilament as needed.
  4. Review String life (play hours) and Weeks until restring.
  5. Use Days until restring and Restrings per year to inform your decision.

How the result changes with String tension (lbs)

String tension (lbs)String life (play hours)Weeks until restring
21419.1
34398.7
51368
65337.3

What each input means

Sport
Select your racquet sport.
String Type
Type of string material.
Sessions per week
How many times you play per week.
Session length (hrs)
Average playing time per session.
String tension (lbs)
Current stringing tension in pounds.
Heavy hitter?
Set to 1 if you hit with heavy topspin or power. Strings degrade faster.
Humid climate?
Set to 1 if you play in humid conditions. Affects gut and multifilament strings most.

What each result means

String life (play hours)
Estimated play hours before strings need replacing.
Weeks until restring
Based on your playing frequency.
Days until restring
Calendar days until recommended restring.
Restrings per year
How many times per year you should restring.
Tension at restring point (lbs)
Estimated remaining tension when restring is due.
Tension lost (lbs)
How many pounds of tension are lost by restring time.
Annual restringing cost ($)
Estimated yearly cost for strings and labor.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Sport = 1, String Type = 4, Sessions per week = 3, Session length (hrs) = 1.5 = 7 input(s) provided
  2. Calculate String life
    String life = round(baseLife * sportMult * clampedTensionFactor * hitFactor * humidFactor)
    35 = 35
  3. Calculate Weeks until restring
    7.8 = 7.8
  4. Calculate Days until restring
    Days until restring = round(weeksUntilRestring * 7)
    55 = 55
  5. Calculate Restrings per year
    7 = 7

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

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