How many calories in a gin and tonic?

A single G&T with regular tonic has about 120 calories. With slimline tonic, just 55 calories. The gin itself is only 52 kcal — the tonic does the damage.

Is gin lower in calories than beer?

A single gin (52 kcal) is lower than a pint of lager (~180 kcal). But a double G&T with regular tonic (172 kcal) is nearly the same as a pint.

What is the glycemic index of gin?

Gin has a glycemic index of 0, which is classified as Low GI. Gin contains zero carbohydrates and no sugar, so it has no glycemic index.

Glucose: Very LowNOVA 2

How Many Calories for Gin?

A single measure (25ml) of gin has 52 calories — identical to vodka. All calories come from alcohol, with zero carbs and zero sugar. A gin and tonic adds 70-120 kcal from the tonic.

Calories by preparation

Method	Calories	Protein	Fat	Carbs	NOVA
Single shot (25ml)All calories from alcohol — zero carbs, zero sugar	52	0g	0g	0g	2
Gin & slimline tonicThe lightest G&T optionSlimline tonic uses artificial sweeteners — NOVA 4	55	0g	0g	0.5g	—
Gin & regular tonic (200ml)Tonic more than doubles the caloriesRegular tonic contains sugar or HFCS — NOVA 4	120	0g	0g	17g	4
Double gin & tonicDouble shot adds 52 kcal over a single	172	0g	0g	17g	4

Nutrition per 100g

Nutrient	Per 100g	Per serving
Energy	207 kcal / 866 kJ	52 kcal
Protein	0g	0g
Carbohydrates	0g	0g
of which sugars	0g	—
Fat	0g	0g
of which saturated	0g	—
Fibre	0g	—
Salt	0g	—

Serving size: 1 single measure (25ml) · Source: Tesco product page, October 2025

Glucose impact

Glycemic Index

Very Low

Glucose risk

Neat gin has zero carbohydrates. The tonic is where the glucose impact comes from — regular tonic has 17g sugar per 200ml.

Processing level

NOVA 2 (processed culinary ingredient)

Gin is distilled from grain with botanicals (juniper, coriander, citrus peel). Traditional distillation makes it NOVA 2. Flavoured/coloured gins with added sugar or artificial flavouring may be NOVA 3-4.

Gin at Tesco

Source: Tesco product page, October 2025

Tesco London Dry Gin 35cl

£7.25*

Tesco London Dry Gin 70cl

£12.25*

Tesco London Dry Gin 1L

£17.5*

Tesco Finest The Melodist London Dry Gin 70Cl

£21.0*

Tanqueray London Dry Gin & Tonic Ready to Drink Premix 250ml

£2.55*

*Prices were correct at the time of collection and may have since changed. Check Tesco.com for current pricing.

What to watch for when shopping

Neat gin has zero carbs and zero sugar - all 207 kcal per 100ml come from alcohol. The mixer is where the calories hide: regular tonic adds 70+ kcal and 17g sugar per 200ml. Slimline tonic adds only 3 kcal but contains artificial sweeteners (NOVA 4). Flavoured gins may contain added sugar. For the lowest calorie option, choose gin with soda water and fresh lime.

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