Tempeh is a fermented soybean cake that fits neatly into many eating styles — vegetarian, vegan, low-carb, and keto. Unlike tofu, which is fairly low in carbohydrates, tempeh contains a moderate amount of carbs because the whole soybean is retained along with its fiber. If you are counting carbs for diabetes management, ketosis, or general meal planning, this calculator gives you quick answers.
Enter the amount of tempeh you plan to eat in grams or ounces, and the tool estimates total carbohydrates, dietary fiber, and net carbs — the carbs your body actually absorbs. You can use the preset portion buttons for common serving sizes like 3 oz or half a cup.
Nutrition values can vary between brands depending on grains added during fermentation, so treat results as a solid estimate and check the package label when exact numbers matter.
🍚 Tempeh Carb Intake
Calculate total carbs, net carbs, and fiber for any portion of tempeh.
⚠️ Values vary by brand and fermentation. Check the package label when precision matters.
Step-by-Step Guide
To get the most accurate estimate, start by weighing tempeh on a food scale. If you don’t have one, the preset portion buttons give reasonable approximations for common serving sizes. Then follow these steps:
- Type the amount into the calculator, or tap a preset button to fill it automatically.
- Choose grams or ounces. The calculator converts ounces using 1 oz = 28.35 g.
- Press Calculate Carbs to see total carbohydrates, dietary fiber, and net carbs.
- Use the breakdown line to see how the numbers were calculated, which is handy when you want to log the result in a food diary.
How the Carb Calculation Works
This tool uses typical reference values for plain tempeh: roughly 9.0 g of total carbohydrate and 3.5 g of dietary fiber per 100 g. Though figures differ slightly between brands, these averages come from commonly cited food-composition databases and work well for planning.
The core formula is simple:
Total carbs = portion weight (g) × 9.0 ÷ 100
Fiber = portion weight (g) × 3.5 ÷ 100
Net carbs = total carbs − fiber
For example, a 113 g serving (about 4 oz) gives 113 × 9.0 ÷ 100 = 10.2 g of total carbs and 113 × 3.5 ÷ 100 = 4.0 g of fiber, leaving roughly 6.2 g of net carbs. Compare that with the same weight of white rice, which delivers far more digestible carbohydrate, and you can see why tempeh is popular on lower-carb menus.
Reference Data: Typical Tempeh Macros
| Portion | Weight | Total Carbs | Fiber | Net Carbs |
|---|---|---|---|---|
| 2 oz | 57 g | 5.1 g | 2.0 g | 3.1 g |
| 3 oz | 85 g | 7.7 g | 3.0 g | 4.7 g |
| 4 oz | 113 g | 10.2 g | 4.0 g | 6.2 g |
| Half cup | 83 g | 7.5 g | 2.9 g | 4.6 g |
| 1 cup | 166 g | 14.9 g | 5.8 g | 9.1 g |
These figures use the same 9.0 g carbohydrate and 3.5 g fiber baseline as the calculator. Rounding may produce small differences. If you compare products, check the nutrition label: some tempeh is blended with barley or brown rice, which pushes carbohydrate content higher.
Net Carbs vs. Total Carbs
Total carbohydrate is the sum of starch, sugar, and dietary fiber. Fiber is not fully digested, so many low-carb eaters subtract it to estimate net carbs — the carbs that have a meaningful effect on blood sugar. The calculator displays both so you can choose which number fits your tracking style.
Tip: if you follow a keto or very low-carb plan, use the net carb figure for meal planning. If you count total carbohydrates for diabetes management, use the larger total carb number and discuss fiber adjustment with your care team.
Common Mistakes to Avoid
- Weighing in the wrong form: Nutrition panels for tempeh usually refer to the raw, packaged product. If you cook it first, water loss can concentrate nutrients, so weigh uncooked unless the label says otherwise.
- Ignoring added grains: Multi-grain tempeh can contain 2–4 g more carbs per 100 g. Read the ingredient list if you buy flavored or grain-based varieties.
- Using volume for small pieces: Cubed or crumbled tempeh packs differently into a measuring cup. A scale is more reliable, especially for portion tracking.
- Confusing net with total: Record the number that matches your diet plan, and stay consistent across your food diary so your totals make sense.
Frequently Asked Questions
Is tempeh keto-friendly? Yes, in reasonable portions. A 4 oz serving has about 6 g net carbs, which fits into a standard 20–30 g daily net-carb budget for many keto eaters. Check the label for added grains.
Does cooking change the carb count? No significant change in the tempeh itself, but frying or adding sauces adds carbs and fat from the coating. Calculate the plain cooked tempeh first and then log any marinade or breading separately. For more detail on how soy products compare, this soy fiber per 100g tool breaks down fiber content for other soy-based foods.
Why do different brands list different carb values? Some tempeh is made with brown rice, barley, or other grains mixed into the soybean culture, which raises carbohydrate content. Storage and fermentation time can also alter moisture and nutrient density, so brand-to-brand variation is normal.