Sugar to Teaspoons Calculator
Turn the grams of sugar on a label into teaspoons and sugar cubes, and see what share of a daily limit one serving — or the whole pack — takes.
A level teaspoon of sugar is about 4.
How the sugar to teaspoons calculator works
A level teaspoon of sugar is about 4.2 g and a sugar cube 4 g, so a 600 ml cola with 64 g of sugar is 15 teaspoons. Health bodies suggest keeping free sugars under 10% of energy — about 50 g a day for an adult — and ideally under 25 g. Enter the label figure per serving and the number of servings you actually have.
Formula: teaspoons = grams ÷ 4.2; cubes = grams ÷ 4; share = grams ÷ daily limit
Worked examples
| Inputs | Teaspoons of sugar | Note |
|---|---|---|
| 27 g in a serving | 6.4 | 6.4 teaspoons |
| A 600 ml cola (64 g) | 15.2 | 15.2 teaspoons — 128% of the limit |
| Two yoghurts at 16 g | 7.6 | 7.6 teaspoons |
FAQFrequently asked questions
Does the label sugar include natural sugars?
Yes — “sugars” on a label counts everything, including the lactose in milk and fructose in whole fruit, which guidelines do not restrict. Free sugars are those added or in juice, honey and syrups; on a can of soft drink the two are the same.
Why 4.2 g per teaspoon?
A level 5 ml teaspoon holds about 4.2 g of granulated sugar; a heaped one holds nearer 7. Sugar cubes are typically 4 g, which is why the two rows differ slightly.
What is the daily limit?
The World Health Organization advises free sugars under 10% of energy — about 50 g on 2,000 kcal — with a further benefit below 5% (25 g). Adjust the limit field to your own energy intake.
How much is in common drinks?
A 375 ml can of cola about 40 g (10 teaspoons), a 600 ml bottle 64 g, a 250 ml glass of orange juice 20 g, a flavoured yoghurt pot 15–20 g.
Where these figures come from
- US FDA — Safe Minimum Internal Temperatures — the internal temperatures the roasting calculator targets
- NIST SP 811 — Guide for the Use of the International System of Units — the exact weight and volume conversions used throughout
- UK Food Standards Agency — food safety and labelling standards
Last checked: September 2026. Baking ratios follow standard baker's percentage practice; roasting guidance follows published safe internal temperatures.