Racket String Tool

Step 1/6 — Upload a photo

Choose a picture where the stringbed is clearly visible.

Step 2/6 — Enter racket parameters

Pattern: Area (cm²):

Racket shape: Elliptical Yonex / polygon

Step 3/6 — Rotate to align strings

Use the rotate buttons on the image. Then continue.

Step 4/6 — Mark the inner rim

Ellipse: ≥5 points. Polygon: ≥3 points. Tap near the inner frame.

Step 5/6 — Preview grid extent

Move the slider. The suggested grid updates on the image. Then continue to manual fine-tuning.

Grid extent fraction: 0.75

~0.70–0.80 is usually realistic: outer strings inset from the frame

Step 6/6 — Adjust string grid

Select mains/crosses, choose line, move it. Then update lengths.

Type:

Go to:

(legacy; mains symmetrized on copy only)

Load an image to begin.

Tip: paste into your TennisFeel racket profile.

Mains (cm)

Crosses (cm)