What’s Your Guild Factor? Surfboard Volumes Explained

Here’s a nifty little gadget from the crew at …Lost surfboards to help you dial in your next board. Read all the info below or to play around with the Guild Factor (the one that actually works) go to LOSTSURFBOARDS.NET.

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DIAL IN THE PERFECT FLOTATION FOR YOUR NEXT SURFBOARD

1. Choose your body weight by sliding the lefthand bar.
2. Next, slide the righthand bar to the perfect volume for your new board by placing the blue dot on your desired GF Ratio.

Recommended GF Shortboard Ratios:

- Advanced, extremely fit, high performance surfers: RANGE FORM .34gf to.36g
- Typical fitness with average, to above average skills: RANGE FROM 36gf to 38gf
- Domesticated, lower fitness, desk jobs, and Weekend Warrior surfers: RANGE FROM 38gf to 42gf
- Novice surfers, or surfers with extremely small surf, thick wetsuits or adverse conditions: RANGE FROM 40GF TO 50gf (depending on age, ability and motivation)

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*If you’re surfing in warm water and good waves, the lower end of the scale is recommended. If you’re surfing in poor conditions, looking for help in crowded situations, or wearing thick wetsuits, lean towards the higher end of the range that you fall into.

More about GF (Guild Factor)

GF measures the ratio between the surfers body weight and the volume (in Cubic Liters) of a surfboard. The GF number is the percentage of volume (floatation) to body weight. If a surfer knows his weight, he can scroll up and down the scale to find his recommended volume (keeping in mind skill and fitness). If a surfer knows the volume of his favorite board, or a board that feels too floaty or not floaty enough, he can use the chart to guide him in a better direction. As anything, this is simply another tool to make things easier when choosing a surfboard. Its not a means to an end, and nothing is set in stone. Ultimately, the surfer needs to use what feels best for himself.

Mayhem and Lost Surfboard riders’ GF%

Kolohe Andino: 165lbs / 26.6cl GF- 35%
Taj Burrow: 152lbs / 24.25cl GF-35%
Brett Simpson: 175lbs / 28.00cl GF- 35%
Mason Ho: 150lbs / 25.00cl GF- 37%

More references to come

Additional example of GF%
Matt Biolos: 205lbs / 39cl GF- 42%

  • MOJO

    hey guys, thanks so much for this, I am coming up with .50 for my GF, after getting that number, what do i do with it to find volume?

  • MOJO

    Im an idiot, I figured it out, thanks.

  • Liza Pierce

    Your height & body type account for “the mayhem factor” because those 2 variables are not taken into account in weigh to mass ratio formula. We would be better served if Einstein had found the perfect mathematical formula for this problem. For example, if a 205lb chic who is 6ft 2in tall & carries most of that weight in a big ol booty & huge set of knockers is going to have a different center of gravity than a dude of the same height & weight who is more proportioned. A tall scrawny dude is gonna have different board requirement than another dude who is short & stocky. Anybody out there have any thought &/or theories on this matter?