Tomo MPH

ReForest

Michael Peterson status
Oct 7, 2020
3,071
4,555
113
Does anyone know the formula for calculating volume? I think the volume is based on the dimensions of the board, right? Length x width x thickness? I don't think the weight of the glassing, stringer and fin boxes is a factor in calculating volume?

For example, a 5'6 x 18 1/2 x 2 5/16 2lb EPS glassed with single 4oz on top and single 4 oz on bottom will float more than the same exact board with double 6 oz on top and bottom?
 

j_mac

Legend (inyourownmind)
Aug 16, 2020
418
1,567
93
Does anyone know the formula for calculating volume? I think the volume is based on the dimensions of the board, right? Length x width x thickness? I don't think the weight of the glassing, stringer and fin boxes is a factor in calculating volume?

For example, a 5'6 x 18 1/2 x 2 5/16 2lb EPS glassed with single 4oz on top and single 4 oz on bottom will float more than the same exact board with double 6 oz on top and bottom?
Volume is based on the dimensions of the board and if it was a perfect rectangular prism, than its easy length x width x height.

The weight of the board is relatively negligible, because its not the weight of the board that is the comparison, it is the total weight (board plus human). When facctoring in the human weight, the difference in board weight is minor in a buoyancy calculation. For example a board that weighs 6lbs versus a board that weighs 9lbs is 3lbs difference relative to 180lbs is not going influence the buoyancy much. It is a few relative percent.

There is a difference. I believe the characteristics of the boards flex etc is more noticeable than any weight differences other than the physiological response from carrying the board's weight under your arms.
 

ReForest

Michael Peterson status
Oct 7, 2020
3,071
4,555
113
If it felt so heavy whyd you buy it?
It was the only 5'6 i could find, everything everywhere is sold out and nothing on CL or OU. I figured with the added weight it would be good for offshore days. My other boards are around 4lbs so 6lbs didnt seem that big of a difference, but it does feel like a cinder block compared to the helium one! haha.

I hope i dont pull a sunny garcia and smash myself in the face. This board would probably knock someone the F-out.
 

oeste858

Phil Edwards status
Sep 11, 2017
6,931
17,273
113
San Diego, CA
It was the only 5'6 i could find, everything everywhere is sold out and nothing on CL or OU. I figured with the added weight it would be good for offshore days. My other boards are around 4lbs so 6lbs didnt seem that big of a difference, but it does feel like a cinder block compared to the helium one! haha.

I hope i dont pull a sunny garcia and smash myself in the face. This board would probably knock someone the F-out.
Maybe it’s the universe or the golden mean telling you to get a kite & harness and get out there on the windy days!
 

casa_mugrienta

Duke status
Apr 13, 2008
43,209
17,641
113
Petak Island
It was the only 5'6 i could find, everything everywhere is sold out and nothing on CL or OU. I figured with the added weight it would be good for offshore days. My other boards are around 4lbs so 6lbs didnt seem that big of a difference, but it does feel like a cinder block compared to the helium one! haha.
You should've been patient.
 
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ReForest

Michael Peterson status
Oct 7, 2020
3,071
4,555
113
You should've been patient.
Firewire is sold out of everything so who knows when I'd be able to get a 5'6. I talked to the guys when i picked up the board and they cant even keep boards in the warehouse. As soon as they come in, they go right back out. COVID has definitely changed the surf world.

P.s. BUY DOGE!!!
 
Last edited:
Oct 30, 2019
38
48
18
Does anyone know the formula for calculating volume? I think the volume is based on the dimensions of the board, right? Length x width x thickness? I don't think the weight of the glassing, stringer and fin boxes is a factor in calculating volume?

For example, a 5'6 x 18 1/2 x 2 5/16 2lb EPS glassed with single 4oz on top and single 4 oz on bottom will float more than the same exact board with double 6 oz on top and bottom?
BoardPorn's magic formula ( I saw this on instagram ):

Calculate length in inches times width times thickness - take that number and divide by 106.5

( L x W x H ) / 106.5

e.g. for a 6'0 hydroshort you get (6*12*20*2.68)/106.5 = 36.2 ... published volume is 35

for a 5'9 OB1 you get 32.4. vs published 31.5
 
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waxfoot

Michael Peterson status
Apr 21, 2018
2,081
4,002
113
BoardPorn's magic formula ( I saw this on instagram ):

Calculate length in inches times width times thickness - take that number and divide by 106.5

( L x W x H ) / 106.5

e.g. for a 6'0 hydroshort you get (6*12*20*2.68)/106.5 = 36.2 ... published volume is 35

for a 5'9 OB1 you get 32.4. vs published 31.5
Sooo, a wildly incorrect formula then :D
 

JDJ

Miki Dora status
Mar 1, 2014
4,829
5,078
113
The OC
I try to size Tomos based on my normal volume. That always seems to work. Just look at the board you're normally riding and then order based on Dan's volume chart.