Estimate your board’s volume.

Pick the closest outline, slide to your dimensions, and compare the result with a rider-weight starting point.

Board shape

Pulled-in nose and narrow tail

Dimensions

Exact range for everyday shortboards through longboards

Rider weight

A starting point, adjusted by ability
170 lb · 77 kg

Shape adjustment

Fine-tune for rails, rocker, and foam
0.50
Lean / rockeredFull / flat
Estimated volume
29.5L

Likely range 27.7–31.3 L

Recommended starting range · 170 lb intermediate27.8–34.0 L

Use this as a baseline. Fitness, wave power, board design, and paddle preference can move the right number.

6′0″ × 20″ × 2½″
Shortboard shape · 0.50 factor

Why it’s an estimate

Two boards with identical outside dimensions can carry different volume. Rail foil, deck dome, concaves, channels, rocker, and tail shape all change the true number.

Calculation used

length × width × thickness × shape factor
The ±6% range reflects normal variation. The rider range is a broad weight-and-ability starting point, not a prescription.

Recommended surf resources

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