At 70 kg an intermediate shortboarder sits around 34 liters, a fish about 37, a midlength about 47 and a longboard about 59. Volume is the number every brand now prints on its boards: the liters of foam, which set how easily a board paddles and floats. These tables come from SurfCalc's own model, fitted to the published guides of major brands, for an average adult: 30 to 39, average fitness, surfing weekly in average waves. The calculator adjusts for your age, fitness, how often you surf, wave power and size, wetsuit and construction, and gives a ±5 % range to shop with.
| Board type | 1 Beginner | 2 Beg. / int. | 3 Intermediate | 4 Advanced | 5 Expert |
|---|---|---|---|---|---|
| Performance shortboard | 51.4 | 41.4 | 33.6 | 27.1 | 25.0 |
| Fish / hybrid / groveler | 54.0 | 44.3 | 36.9 | 30.4 | 28.0 |
| Midlength / funboard | 64.3 | 54.7 | 47.0 | 42.1 | 40.0 |
| Longboard | 74.5 | 64.2 | 58.7 | 54.3 | 55.0 |
| Soft-top | 77.1 | 64.2 | 53.7 | 44.8 | 42.5 |