TennistoryTennistory / Tools
Tennis tools
Three conversions players and stringers reach for all the time.
Tension converter
How often to restring
A common rule of thumb: restring as many times a year as you play per week. Polyester loses tension faster, so frequent players often go sooner. Adjust by feel.
Balance converter
Points head-light (negative means head-heavy). 1 point = 1/8 in = 3.175 mm, measured against the midpoint of the racket.
Keep your rackets in Tennistory
Save strings and tension, log every session, restring and grip change, and see when it is time to restring. Free to start.