How many cu ft is my .35L tank

How many cu ft Is my tank?>

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If my math is right a .35L tank should be about 3.1 Cubic Feet.

My 1.6l tank is 14 cubic feet

my 9 liter is 86 cubic feet. 

it seems 1 liter is really close to 10 cubic feet. 

Ohh here is a list I just found

12 Ltr =115 CF

9.0 Ltr = 86 CF 

6.8 Ltr = 65 CF

3.0 Ltr = 29 CF

2.0 Ltr = 19 CF

1.5 Ltr = 14 CF

1.0 Ltr = 9.5 CF

500cc = 4.25 CF


It's about 3.84cuft at 4500psi.

Not sure where you are getting your numbers but if 1ltr (1000cc)=9.5 wouldn't you expect 500cc to be half? 4.75? not 4.25


 
Those number came from acecare the maker of the tank

And i suspect its just like anything else a company just doesnt care about accurate numbers, they care about what sounds good or nice even simple numbers, a 1 liter tank might really be .9 or 1.1 liter where the 500cc bottle might really be a 490cc or a 510cc and I bet this varies between companies based on bottle design. I am guessing everything is just "close" kinda like how my box labeled 44cal bullets are really a .429 or .430 in diameter.
 
I compiled these formulas some time ago from various sources. I can't vouch for their validity, but they seem to be fairly accurate.

Formulas:
- Convert Cubic feet to Liter:
- Liters = (cu ft / 4500 psi) * 411
- Example: 80 cu ft tank = 7.3 liter tank
- 7.3 Liters = (80 cu ft / 4500) * 411

- Convert Liters to Cubic Feet: 
- Cubic feet = (liters * 4500 psi)/411
- Example: 7.3 liter tank = 80 cu ft tank
- 79.92 Cubic feet = (7.3 liters *4500) / 411

- Convert Cubic Inches to Cubic Feet:
- Cubic Feet = (Cubic Inches / 1728) x (4500 psi / 14.7)
- Example: 90 cu in tank = 15.9 cu ft tank.
- 15.9 cu ft = (90 / 1728) * (4500 / 14.7)

- Convert Cubic Centimeter (cc) to Liter:
- Liter = (Cubic centimeter / 1000)
- Example: 490 cc tank = .49 liters.

- Convert Cubic Centimeter (cc) to Cubic Feet:
- Cubic Feet = (Cubic centimeter / 28317)
- Example: 490 cc tank = .0173 Cu Ft.
- .0173 cu ft = (490 / 28317)

- Convert Cubic Foot (cf) to Cubic Centimeter (cc):
- Cubic Centimeter = (Cubic Feet * 28317)
- Example: .0173 cf tank = 490 cc.
- 490 cc = (.0173 * 28317)


 
I compiled these formulas some time ago from various sources. I can't vouch for their validity, but they seem to be fairly accurate.

Formulas:
- Convert Cubic feet to Liter:
- Liters = (cu ft / 4500 psi) * 411
- Example: 80 cu ft tank = 7.3 liter tank
- 7.3 Liters = (80 cu ft / 4500) * 411

- Convert Liters to Cubic Feet: 
- Cubic feet = (liters * 4500 psi)/411
- Example: 7.3 liter tank = 80 cu ft tank
- 79.92 Cubic feet = (7.3 liters *4500) / 411

- Convert Cubic Inches to Cubic Feet:
- Cubic Feet = (Cubic Inches / 1728) x (4500 psi / 14.7)
- Example: 90 cu in tank = 15.9 cu ft tank.
- 15.9 cu ft = (90 / 1728) * (4500 / 14.7)

- Convert Cubic Centimeter (cc) to Liter:
- Liter = (Cubic centimeter / 1000)
- Example: 490 cc tank = .49 liters.

- Convert Cubic Centimeter (cc) to Cubic Feet:
- Cubic Feet = (Cubic centimeter / 28317)
- Example: 490 cc tank = .0173 Cu Ft.
- .0173 cu ft = (490 / 28317)

- Convert Cubic Foot (cf) to Cubic Centimeter (cc):
- Cubic Centimeter = (Cubic Feet * 28317)
- Example: .0173 cf tank = 490 cc.
- 490 cc = (.0173 * 28317)


Nice formula, thanks