Low-Carb Diet Calculator: The Short Answer
The staples are near-zero: eggs about 0.5g of carbs each, meat, fish and tofu 0g, hard cheese about 0.5g per ounce. Vegetables run 1–5g net per cup (spinach about 1, cauliflower about 3, green beans about 4), avocado about 2g net per fruit, berries 5–11g per cup (raspberries about 5 net), nuts 2–4g net per ounce (almonds about 2.5 net), plain Greek yogurt about 6g per cup and dark chocolate (85%) about 2g per square. The traps are the sauces: ketchup is about 5g per tablespoon and most 'low-fat' dressings are sweetened — read the label even on low-carb-branded foods.
The low-carb food list is shorter than people fear, because most whole proteins and above-ground vegetables are naturally near the floor. This article prices the staples in net carbs, builds a full day from the list under 20 grams, and flags the category that betrays every beginner: sauces and 'low-fat' products, where the sugar hides.
Reading the Staple List
Net carbs (total minus fibre) per typical serving organise the list into tiers. The zero tier: unprocessed meat, fish and eggs (0–0.5g each for eggs), butter and oils (0g), hard cheese (about 0.5g per ounce). The vegetable tier: leafy and cruciferous vegetables at 1–3g net per cup, green beans about 4g, avocado about 2–3g net per fruit despite its 13g total — fibre does that. The portioned tier: berries at 5–11g net per cup (raspberries lowest at about 5–7), nuts at 2–4g net per ounce, plain Greek yogurt about 6g per cup-equivalent serving. Everything bread-shaped, grain-shaped or fruit-juice-shaped sits outside the everyday list, and condiments must be read individually: ketchup is about 5g per tablespoon, barbecue sauce 6–8g, sweet chilli more.
Worked Example: A Full Day From the List, Under 20g Net
- Breakfast: three eggs (about 1.5g net) with spinach (1g). Running total: 2.5g.
- Lunch: chicken (0g) over greens with olive oil (0g) and an ounce of cheese (0.5g). Running total: 3g.
- Snack: an ounce of almonds (about 2.5g net). Running total: 5.5g.
- Dinner: salmon (0g), cauliflower (3g) and green beans (4g). Running total: 5.5 + 3 + 4 = 12.5g.
- Evening: half a cup of raspberries (about 3g net) with cream (0.5g). Day total: 12.5 + 3.5 = 16g net — inside even a keto budget, built entirely from the staple tiers.
Low-Carb Staples, Priced in Net Carbs
Per typical serving — the shopping list this site's low-carb tools assume.
| Food | Serving | Net carbs |
|---|---|---|
| Meat, fish, tofu (plain) | A portion | 0g |
| Eggs | Each | About 0.5g |
| Hard cheese | 1 oz | About 0.5g |
| Spinach / leafy greens | 1 cup | About 1g |
| Cauliflower / broccoli | 1 cup | About 3g |
| Avocado | 1 fruit | About 2–3g |
| Almonds | 1 oz | About 2.5g |
| Raspberries | 1 cup | About 5–7g |
| Greek yogurt, plain | 170g | About 6g |
| Ketchup | 1 tbsp | About 5g — the trap tier |
The Trap Tier and Label Literacy
The traps are manufactured: 'low-fat' dressings and yogurts replace fat with sugar (read for 5–10g where the full-fat version has 1–2g); sugar-free products sweetened with maltitol carry effective carbs their 'net' claims understate; vegetable crisps and cauliflower products sometimes arrive bound with starch. Shellfish deserve a footnote: mussels and oysters store glycogen and run 3–5g per serving — small, but not the zero the 'seafood is free' rule suggests. Fruit beyond berries (an apple at about 19g net) is a moderate-band food, not a strict-band one. And 'zero' on any processed label legally tolerates up to 0.5g per serving, so a day of zero-labelled products can honestly total double figures — the staples above remain the only true zeros.
A Second Plate, Audited: The Gastropub Dinner
The method generalises; a second plate proves it in the environment where low-carb earnestly goes to die — the gastropub menu, where the fryer, the bun and the glaze conspire. The plate: a burger with its bun 'because it's sourdough', skin-on fries 'shared', and a dressed slaw. Priced line by line below, it demonstrates the audit's real skill: distinguishing the plate's structural carbs (bun, batter, breading — remove or keep deliberately) from its decorative ones (glazes, dustings — worth 2–5g and not worth a scene).
- The bun: about 38g — structural, decided once. The patty and cheese: about 1g. The slaw (sweetened dressing): about 8g. The fries, a shared half of a generous portion (about 130g eaten): about 52g.
- Ketchup and relish across the plate: about 9g — the glazes-and-dustings class, nearly a tenth of the plate.
- The plate as served: 38 + 1 + 8 + 52 + 9 = 108g — a whole 50g-tier weekend, on one plate, wearing a pub's wholesome clothes.
- The audited rebuild: bun removed (−38), fries swapped to a side salad with oil (its own 4g counted), slaw and sauces kept: the plate lands at 1 + 8 + 4 + 9 = 22g — down from 108 by two swaps, no willpower, same pub.
- The audit lesson the plate teaches: 90 of its 108 grams sat in two structural choices. Decorative carbs (17g here) are where low-carb eaters waste their vigilance — the structure was always the meal.
Food-List Mistakes
- Trusting the front-of-pack claim over the label's carb and fibre lines — the list is built from labels, not marketing.
- Counting avocado at its 13g total and exiling it, when fibre brings it to 2–3g net — the best fat source on the list, lost to a subtraction not done.
- Sauce blindness: ketchup and sweet dressings at 5–8g per tablespoon can exceed the entire vegetable line of the meal they dress.
- Assuming all berries are equal: raspberries and blackberries sit near 5–7g net a cup; blueberries near 17g — a strict budget notices the difference.
The Bottom Line
The low-carb staples are proteins at zero, above-ground vegetables at 1–4g net, avocado and nuts portioned, berries at the top of the fruit allowance — and the worked day totals 16g net from that list alone. Sauces are the exception that audits everything: read them like desserts, because several of them are.
People Also Ask
How to Calculate Carbs in a Homemade Meal?
Count net carbs by subtracting fibre (and, on labels that list them, sugar alcohols) from total carbohydrates: a wrap with 32g total carbs and 26g of fibre is 6g net. Net counting exists because fibre is not digested into glucose. Use total carbs for plain whole foods (where fibre is small) and net for formulated low-carb products — and be suspicious of bars whose 'net' claim depends on exotic fibres.
What Are the Best Low-Carb Foods for Weight Loss?
Grilled meat and fish, eggs, above-ground vegetables, cheese, butter and olive oil, nuts in portions, and unsweetened drinks — a low-carb restaurant order exists at almost any cuisine by swapping the starch: bunless burgers, salads with grilled protein, fajitas without tortillas, tandoori with salad instead of rice. On this site, most brand pages include lettuce-wrapped or bowl versions whose carbs are a third of the original.
How Many Grams of Carbs Should You Eat Per Meal?
Divide your daily target by the number of meals, then weight it toward the meals where you actually eat starch. On keto (20–30g net a day) that is about 7–10g net per meal across three meals; on a 50g low-carb day, about 15–17g; on 100g, about 30–35g. Most people do better with an uneven split — a near-zero breakfast (eggs are 0.