Define your endpoint
Use the first repeatable point where control, comfort, spin, or confidence leaves your acceptable range.
Free comparison tool
Tennis String Cost Per Hour
A cheaper string job is not always the cheaper setup. Compare two options using installed cost and the hours they remain playable for you—then see cadence, monthly spend, and annual spend.
Transparent math
How the calculator works
Cost per playing hour = installed string-job cost ÷ playable hours.
If you enter weekly hours, annual cost equals cost per playing hour × weekly hours × 52. Monthly cost is the annual estimate divided by 12. Restring cadence equals playable hours ÷ weekly hours.
Example: A $45 setup used for 14 hours costs $3.21 per playing hour. A $60 setup used for 26 hours costs $2.31 per hour, so the higher checkout price is about 28% cheaper per usable hour in this example.
The calculation excludes racquet purchase, travel, taxes not included in your input, and the value of unused reel inventory. For a hybrid, itemized mode lets you enter the amount of main and cross string actually used.
This is transparent first-party calculator logic: inputs stay in the browser, each formula is shown above, and the example can be reproduced by hand. See our editorial and correction standards.
Better inputs
Use playable life—not breakage life
Track actual hours
Calendar time can hide large differences between someone playing once a week and someone playing daily.
Include labor
Installed cost is the fairest comparison. Reel price alone understates each restring if you pay a stringer.
Revisit the estimate
Replace guessed hours with the average from two or three logged string jobs.
Logging hours by hand is the part most players abandon. In the String Tension AI app, playing sessions can be logged in a tap, dictated to Siri, or imported from tennis workouts you already track in Apple Health, and each session is attached to the string job that was in the racquet at the time. Session logging and streaks are free; the cost-per-hour and budget analytics built on top of them are a PRO feature.
Make playable hours a real number
Track your setup and tension trend so future cost comparisons use your own evidence.
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