Carbs in 1 Teaspoon Sugar
Keto-friendlyHow many carbs are in 1 teaspoon sugar?
1 Teaspoon Sugar has 100g net carbs per 100g — 100g total carbs minus 0g fiber — plus 0g protein, 0g fat, and 375 calories. 1 tsp (4g) works out to about 4g net carbs and 15 calories. That makes 1 teaspoon sugar high in net carbs and higher than the typical snacks and sweet, which averages about 51.5g net carbs per 100g. With this carb count, 1 teaspoon sugar 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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Free · no signup · ★ 4.7Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 1 tsp (4g) | 4g | 4g | 0g | 15 |
| 100 g (3.5 oz) | 100g | 100g | 0g | 375 |
| 1 oz (28 g) | 28g | 28g | 0g | 105 |
How many calories are in 1 teaspoon sugar?
1 Teaspoon Sugar has 375 calories per 100g. 1 tsp (4g) has about 15 calories. That's alongside 0g protein, 0g fat, and 100g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 375 |
| 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 (snacks-sweets). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in 1 teaspoon sugar?
- 1 Teaspoon Sugar has 100g of total carbs and 100g of net carbs per 100 grams.
- How many net carbs are in 1 teaspoon sugar?
- 1 Teaspoon Sugar has 100g of net carbs per 100 grams (total carbs 100g minus 0g fiber).
- Is 1 teaspoon sugar keto-friendly?
- Yes — with 100g net carbs per 100g, 1 teaspoon sugar fits a ketogenic diet in normal portions.
- How many calories are in 1 teaspoon sugar?
- 1 Teaspoon Sugar has 375 calories per 100 grams.
- How many carbs are in 1 tsp (4g) of 1 teaspoon sugar?
- 1 tsp (4g) of 1 teaspoon sugar (4g) has about 4g net carbs, 4g total carbs, and 15 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.