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How surfboard volume is calculated
Volume, in litres, determines how much a board floats: the more volume, the easier it is to paddle, catch waves and stay balanced. That's why it matters more than length.
The most common method multiplies your weight in kilos by a factor that depends on your level (the so-called guild factor). It is then adjusted for fitness, age and wave type: more volume if you surf rarely or in soft waves, less if you're fit and surf powerful waves.
Volume factor by level
| Your level | Litres per kg |
|---|---|
| Beginner (first year, whitewater) | 0.90–1.00 |
| Improver (dropping into green waves) | 0.65–0.75 |
| Intermediate (turning on the face) | 0.50–0.60 |
| Advanced | 0.40–0.46 |
| Expert / competitive | 0.35–0.40 |
Surfboard volume chart by weight and level
| Weight | Beginner | Improver | Intermediate | Advanced | Expert / competitive |
|---|---|---|---|---|---|
| 50 kg | 45–50 L | 33–38 L | 25–30 L | 20–23 L | 18–20 L |
| 60 kg | 54–60 L | 39–45 L | 30–36 L | 24–28 L | 21–24 L |
| 70 kg | 63–70 L | 46–53 L | 35–42 L | 28–32 L | 25–28 L |
| 80 kg | 72–80 L | 52–60 L | 40–48 L | 32–37 L | 28–32 L |
| 90 kg | 81–90 L | 59–68 L | 45–54 L | 36–41 L | 31–36 L |
| 100 kg | 90–100 L | 65–75 L | 50–60 L | 40–46 L | 35–40 L |
FAQ
How many litres do I need at 75 kg?
It depends on your level: around 68–75 L as a beginner, 49–56 L as an improver, 38–45 L at intermediate level and 30–35 L if you're advanced.
Is it better to have too much or too little volume?
To learn and progress, a bit too much is better: extra volume means many more waves. Going too small is the most common mistake.
Is the volume of an epoxy board the same as a PU board?
The litres are the same, but an EPS/epoxy board floats a little more and is lighter, so you can aim for the lower end of the range.