Roberts Surfboards
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FIND YOUR IDEAL SURFBOARD VOLUME

Guild Factor is a Tool to start out or dial in your path to finding the Perfect Surfboard.

(GF is the Ratio of Surfboard Volume to your Body Weight, GF = Liters/LB or Liters/KG)

1) On the graph to the right (or bottom on mobile), slide the left hand bar to your body weight.

2) Decide where you fit in the GF Shortboard Ratios below:
Super Fit Advanced Riders Pro/Competitive Levels:
GF 0.34 - 0.36
Normal Fitness Advanced Riders:
GF 0.36 - 0.38
Intermediate and Older Experienced Surfers:
GF 0.38 - 0.42
Casual Surfers, Old Salts, or Working Stiffs wanting best float to catch more waves:
GF 0.43 - 0.49+
Novice Surfer Learning the Lineup:
GF 0.50+
If you are surfing in a wetsuit most of the time or on soft waves consider using the higher end of your range.

3) Slide the right hand bar so that the Red Dot is on your Preferred GF Ratio.

All done!  Inside the box on the lower right hand corner of the graph is YOUR Ideal Volume.  Ideal Volume has a range of +/- 0.5 Liters so it is not an exact end all number but it is the best place to start or be when accounting for your ability, fitness, age and wave type.

On our surfboard model pages, we have charts showing volumes for our standard dimensions.  We also have weight recommendations based on those volumes.  For the Advanced column we used a GF of .36, for Intermediate we used .42 and for Novice we used .50 to arrive at those weights.  Some of our models like a few of the Grovelers are designed to be ridden with more than your normal volume.  For those we use higher GFs to suggest a size to weight ratio based on the goals of the model's design. You'll find that a lot of the time stock dimensions and the corresponding volume will work perfectly for you.  If a suggested board based on its volume seems too short or too long or your needs don't align with a GF Ratio, we can always adjust your board dimensions in a custom order to match your proportions and preferences. 

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Contact Us

Roberts Surfboards 
1362 Tower Sq. # 1 
Ventura, CA 93003
Factory Phone: 805.658.6855
Send us a message HERE
Factory Showroom  

Anacapa Surf N Sport

1005 Harbor Blvd.
Oxnard, CA 93035
Phone: 805.382.1602

Picture
  • SURFBOARDS
    • DIAMONDS & DERIVATIVES >
      • WHITE DIAMOND
      • WHITE DIAMOND 2
      • WD3
      • DIAMOND FISH
      • DISCO DIAMOND
      • HOPE DIAMOND
      • 3DF
    • GROVELERS >
      • DREAM MACHINE
      • FLOATY
      • MUSH MACHINE
      • MUTANT
      • POOL TOY
    • ALL-AROUND ALTS >
      • THE DREAMCATCHER
      • THE DREAMCATCHER PLUS
      • DREAM MAKER
      • DREAM MAKER PLUS
      • JACKAL
      • THE ANYTHING
      • BRO FISH
      • DISCO HIPPY
      • METAMORPH
      • METATWIN
    • BETWEENERS >
      • ARMY KNIFE
      • BIODIESEL
      • CG
      • DIRTY BIRD
      • EL TORMENTOR
      • FISH PACO
      • THE LIP
      • MEAT CLEAVER
      • MODERN 80'S
      • MODERN GEM
      • STAR CHIP
      • THE GOODS
      • THE VINDICATOR
      • VLAD
    • BLACK SERIES >
      • BLACK COBRA
      • BLACK DIAMOND
      • BLACK DUMP TRUCK
      • THE BLACK PUNT
      • BLACK THUMB
    • HIGH PERFORMANCE SHORTBOARDS >
      • GSD
      • MM-16
      • MP3
      • REDNECK
      • ROBS BIG BOY TRI
      • T-33
      • THE ILL
      • THE RAP
      • TURBO DIESEL
      • GROM SHORTBOARDS >
        • THE BEAVER
        • CRUZEE
    • STEP UPS AND BIG WAVE GUNS >
      • G STEP UP
      • OB PIN
      • PIN MASTER
      • TURBO CHARGER
      • WOOLLY MAMMOTH
    • MODERN CLASSICS >
      • HPLB
      • MODERN MID
      • INVADER
      • TWINVADER
      • THE FUN 1
      • CLASSIC LB
      • CLASSIC MID PIN
      • CLASSIC SINGLE + 2
      • CLASSIC FISH
    • ALL SURFBOARDS
  • Q&A
    • VOLUME FINDER
    • BOARD QUESTIONNAIRE
    • LOGO / ART OPTIONS
    • WHAT IS TWONZER?
  • TECHNOLOGY
    • PU/PE
    • RET
    • RFT
    • RFT-2
    • RFT-TDD
    • ESWT: EPOXY SOFT WRAP TECH
    • RET-KB
    • ALTERNATES
  • ABOUT
  • DEALERS
  • SHOP
    • CUSTOM SURFBOARDS
    • STOCK SURFBOARDS
    • FINS
    • APPAREL
    • GIFT CARDS