Carbs in Sugar (1 tsp)
Keto-friendlyHow many carbs are in sugar (1 tsp)?
Sugar (1 tsp) has 100g net carbs per 100g — 100g total carbs minus 0g fiber — plus 0g protein, 0g fat, and 400 calories. 1 tsp (4g) works out to about 4g net carbs and 16 calories. That makes sugar (1 tsp) high in net carbs and higher than the typical snacks and sweet, which averages about 52.2g net carbs per 100g. With this carb count, sugar (1 tsp) fits a keto or low-carb diet (usually 20–50g net carbs per day) in normal portions. Values are per per 100 g, sourced from Manufacturer-reported values; net carbs are computed by CarbMeNot.
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Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Is sugar (1 tsp) keto-friendly?
Sugar (1 tsp) is generally not keto-friendly. It has 100g net carbs per 100g (100g total carbs − 0g fiber). A typical serving — 1 tsp (4g) — is about 4g net carbs. On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 1 tsp | 4g | 4g | 0g | 16 |
| 100 g (3.5 oz) | 100g | 100g | 0g | 400 |
| 1 oz (28 g) | 28g | 28g | 0g | 112 |
How many calories are in sugar (1 tsp)?
Sugar (1 tsp) has 400 calories per 100g. 1 tsp (4g) has about 16 calories. That's alongside 0g protein, 0g fat, and 100g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 400 |
| Total carbs | 100g |
| Net carbs | 100g |
| Fiber | 0g |
| Sugar | 100g |
| Sugar alcohols | 0g |
| Protein | 0g |
| Fat | 0g |
| Sodium | 0mg |
| Potassium | 0mg |
Source: Manufacturer-reported values (other). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in sugar (1 tsp)?
- Sugar (1 tsp) has 100g of total carbs and 100g of net carbs per 100 grams.
- How many net carbs are in sugar (1 tsp)?
- Sugar (1 tsp) has 100g of net carbs per 100 grams (total carbs 100g minus 0g fiber).
- Is sugar (1 tsp) keto-friendly?
- Sugar (1 tsp) is generally not keto-friendly. It has 100g net carbs per 100g (100g total carbs − 0g fiber). A typical serving — 1 tsp (4g) — is about 4g net carbs. On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.
- How many calories are in sugar (1 tsp)?
- Sugar (1 tsp) has 400 calories per 100 grams.
- How many carbs are in 1 tsp of sugar (1 tsp)?
- 1 tsp of sugar (1 tsp) (4g) has about 4g net carbs, 4g total carbs, and 16 calories.
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CarbMeNot provides general nutrition information, not medical advice. Values are estimates — verify before relying on them for any health decision. See our Medical Disclaimer.