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Stringer Calculator
Convert tension units and estimate how many complete racquets your string reel can cover.
Enable JavaScript to use these calculators. The formulas are also provided below.
Tension converter
Convert a stringing-machine setting between pounds-force and kilograms-force.
Unit conversion only. Follow the racquet manufacturer’s tension limits and stringing instructions; this is not a tension recommendation.
kgf = lb × 0.45359237
lb = kgf ÷ 0.45359237
String reel planner
Use your measured length per job, including tails and knot allowance.
The 10 m value is an example, not a cutting instruction. Actual use depends on the frame, pattern, machine and working allowance.
Complete racquets = round down ((remaining length − reserve) ÷ length per racquet).
Bring your setup to a certified stringer
Share your racquet model, current string, tension and playing needs before deciding on your next restring.
