How Much Does SodaStream Cost Per Litre? UK Price Breakdown 2026

If you already own a SodaStream or another home carbonation machine, one of the most useful figures to know is how much each litre of flavoured fizzy drink actually costs to make.

There are two main ongoing costs:

1. The flavour syrup
2. The CO₂ used to carbonate the water

Using current Florida Syrups prices and SodaStream UK gas-exchange pricing, a homemade flavoured fizzy drink works out at roughly 72p–77p per litre for syrup and CO₂, depending on which syrup pack and CO₂ option you use.

That figure does not include the initial cost of the machine, delivery charges or the small cost of tap water.

Quick Answer: What Does SodaStream Cost Per Litre?

Using a standard Florida Syrups bottle:

• Syrup: approximately 55p per litre
• CO₂: approximately 22p per litre at SodaStream’s stated maximum 60L cylinder yield
• Combined: approximately 77p per litre

Using a Florida Syrups twin pack reduces the syrup portion to around 50p per litre, bringing the estimated combined running cost to approximately 72p per litre.

SodaStream currently lists a one-time gas-cylinder exchange at £12.99, with subscription refills starting from £10 per cylinder. Its cylinders are rated to make up to 60 litres, although actual yield varies with carbonation level and machine.

How Much Does the Syrup Cost Per Litre?

Florida Syrups concentrates make several litres of finished drink from a single bottle.

Florida Syrups option	Price	Approx. finished drink	Syrup cost per litre
300ml bottle	£3.49	6.3L	~55p
500ml bottle	£5.19	9.5L	~55p
2 × 500ml twin pack	£9.59	19L	~50p

300ml Bottle

£3.49 ÷ 6.3L = approximately 55p per litre

500ml Bottle

£5.19 ÷ 9.5L = approximately 55p per litre

Twin Pack

£9.59 ÷ 19L = approximately 50p per litre

So, based on syrup alone, the twin pack gives the lowest cost per litre.

How Much Does SodaStream CO₂ Cost Per Litre?

SodaStream UK currently lists a standard gas exchange at £12.99.

A cylinder is rated to carbonate up to 60 litres of water.

Using the maximum stated yield:

£12.99 ÷ 60L = approximately 22p per litre

SodaStream also offers subscription refills from £10 per cylinder, which would theoretically reduce the CO₂ cost to:

£10 ÷ 60L = approximately 17p per litre.

However, “up to 60 litres” is important.

If you prefer heavily carbonated drinks, you may get fewer than 60 litres from a cylinder. In that case, your actual CO₂ cost per litre will be higher.

What Is the Total Cost Per Litre?

Combining syrup and CO₂ gives a more useful estimate.

Standard 300ml or 500ml syrup

Approximately:

55p syrup + 22p CO₂ = 77p per litre

Twin-pack syrup

Approximately:

50p syrup + 22p CO₂ = 72p per litre

Using SodaStream’s lower-priced CO₂ subscription could reduce those estimates by around 5p per litre, assuming the cylinder achieves its stated maximum yield.

SodaStream Cost Per Litre at a Glance

Cost	Approx. per litre
Florida Syrups 300ml	55p
Florida Syrups 500ml	55p
Florida Syrups twin pack	50p
CO₂ at £12.99 / 60L	22p
Standard syrup + CO₂	77p
Twin-pack syrup + CO₂	72p

These are running-cost estimates rather than guaranteed costs because the amount of CO₂ you use can vary.

What Costs Are Not Included?

The figures above are designed to show the everyday running cost of making flavoured fizzy drinks.

They do not include:

• The original cost of the SodaStream machine
• Delivery charges
• The cost of tap or filtered water
• Replacement bottles or other accessories

If you already own a machine, the syrup and CO₂ are normally the main ongoing costs.

Does the SodaStream Machine Cost Affect the Price Per Litre?

Initially, yes.

If you buy a machine specifically to make fizzy drinks, its purchase price is an additional cost.

However, the more you use the machine, the smaller that initial cost becomes when spread across each litre you make.

For example, someone who only makes a few litres a month will spread the purchase price across far fewer drinks than someone who uses the machine every day.

For this reason, it is clearer to separate the initial equipment cost from the ongoing syrup + CO₂ cost.

How Do You Get the Expected Syrup Yield?

The figures above assume you prepare Florida Syrups at the recommended strength.

Use:

50ml syrup with 840ml of pre-carbonated sparkling water.

The basic method is:

1. Carbonate the water first.
2. Add the measured syrup.
3. Mix gently.
4. Serve chilled.

Using more concentrate than recommended will reduce the number of litres you get from a bottle and increase your actual cost per litre.

Does Stronger Carbonation Cost More?

Yes.

Every time you add more CO₂, you use more gas.

SodaStream’s “up to 60 litres” figure therefore should not be treated as a guarantee that everyone will get exactly 60 litres from a cylinder. SodaStream itself notes that yield depends on factors including carbonation level and the type of machine.

If you prefer a strongly carbonated drink, it is sensible to budget for a slightly higher cost per litre.

What Happens if You Get Only 40 or 50 Litres From a Cylinder?

This shows why the gas yield matters.

At a £12.99 exchange price:

Actual cylinder yield	Approx. CO₂ cost per litre
60L	22p
50L	26p
40L	32p

So with a standard syrup costing around 55p per litre, your approximate combined cost would become:

• 77p/L at 60L per cylinder
• 81p/L at 50L per cylinder
• 87p/L at 40L per cylinder

This is a more useful way to budget if you know you prefer plenty of fizz.

Is the Twin Pack Better Value?

On syrup cost alone, yes.

The twin pack costs £9.59 and makes approximately 19 litres, giving a syrup cost of around 50p per litre.

That compares with approximately 55p per litre for the individual 300ml and 500ml bottles.

The difference is not huge per litre, but it becomes more noticeable if you make fizzy drinks regularly.

How Much Does a 500ml Bottle Make?

One 500ml Florida Syrups bottle makes approximately 9.5 litres of finished drink when prepared at the recommended strength.

That means:

£5.19 ÷ 9.5L = approximately 55p per litre for flavour syrup.

CO₂ is then added separately to calculate your full running cost.

Frequently Asked Questions

How much does SodaStream cost per litre in the UK?

Using Florida Syrups and a £12.99 SodaStream gas exchange, a simple estimate is around 77p per litre for syrup and CO₂ when the cylinder produces the stated maximum 60 litres.

Does that include the cost of the machine?

No. The calculation covers syrup and CO₂ only.

How much does the syrup cost per litre?

Individual Florida Syrups bottles work out at approximately 55p per litre, while the twin pack works out at about 50p per litre.

How much does SodaStream gas cost per litre?

At £12.99 for a cylinder producing up to 60 litres, the theoretical CO₂ cost is approximately 22p per litre.

Will I definitely get 60 litres from a cylinder?

No. SodaStream describes the capacity as up to 60 litres. Actual yield depends partly on how much carbonation you use.

How much syrup should I use?

Use 50ml Florida Syrups concentrate with 840ml of pre-carbonated sparkling water.

A Simple Way to Calculate Your Own Cost

For the most accurate figure, use what you actually pay and how many litres you really get from a gas cylinder.

The calculation is:

Syrup cost per litre + CO₂ cost per litre = approximate running cost per litre

Using the current examples:

55p syrup + 22p CO₂ = approximately 77p per litre

Or with the twin pack:

50p syrup + 22p CO₂ = approximately 72p per litre

That gives you a much more useful picture of the real running cost than looking at the syrup price alone.

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