Pizza isn’t the first food that comes to mind for vitamin C, but the tomato sauce, vegetables, and herbs on a slice add up more than you might expect. Tomato-based sauce is the main contributor, while bell peppers, cherry tomatoes, broccoli, and leafy greens can give your slice a real micronutrient boost. This calculator estimates the vitamin C in your pizza based on pizza type, number of slices, slice weight, and any extra vegetable toppings.
To get started, choose your pizza type, enter how many slices you plan to eat, and tick any vitamin C-rich toppings you’ve added. The tool shows total vitamin C, the amount per slice and per 100 grams, and the percentage of the recommended Daily Value (90 mg) you’ve covered — plus a fun orange-equivalent comparison.
Whether you’re tracking micronutrients, planning meals around immune health, or simply curious about your Friday night slice, this calculator gives you a quick, practical estimate based on standard nutrition reference values.
🥦 Extra vitamin C boosters per slice
How to Use This Tool
Start by selecting the pizza type that matches your slice. The base vitamin C values are per one average slice (about 110 g). Enter how many slices you ate or plan to eat, then adjust the slice weight if yours differs. Tick any extra toppings from the vitamin C booster list — each adds a per-slice amount based on typical restaurant topping portions. Press Calculate vitamin C to see your total, the share of the 90 mg Daily Value, and the per-100-g value.
Formula Explained
The estimate is built from three pieces: the base sauce/crust contribution for the selected pizza type, the added vitamin C from any extra toppings, and the number of slices. A slice weight is then used to express the result per 100 grams.
Vitamin C per 100 g = (per-slice vitamin C ÷ slice weight) × 100
Daily Value coverage = total ÷ 90 mg × 100%
Base per-slice values are adapted from USDA FoodData Central entries. Tomato-based sauces are the main driver; 60–80 g of tomato sauce on a slice usually provides roughly 3–7 mg of vitamin C, and that range is reflected in the pizza-type presets.
Worked Example
Situation: You eat two slices of veggie supreme pizza (base 12 mg/slice) and add extra broccoli (+3 mg/slice).
Calculation: Per slice = 12 + 3 = 15 mg. Total = 15 × 2 = 30 mg. Per 100 g = (15 ÷ 110) × 100 ≈ 13.6 mg. Daily Value coverage = 30 ÷ 90 × 100 = 33%.
Result: Two slices provide about 30 mg of vitamin C — roughly a third of your daily need and about the same as 0.43 medium oranges.
Reference Values
These approximate base values per slice are used in the calculator. Actual values vary with recipe, sauce amount, and cooking time.
| Pizza type | Base vitamin C per slice (mg) |
|---|---|
| Cheese pizza | 5.0 |
| Margherita | 6.5 |
| Pepperoni | 4.0 |
| Hawaiian | 4.0 |
| Gluten-free cheese | 3.0 |
| Veggie supreme | 12.0 |
| Supreme (meat + veg) | 10.0 |
| White pizza | 1.0 |
The per-slice additions for extra toppings are practical estimates: bell peppers +8 mg, cherry tomatoes +4 mg, broccoli +3 mg, red onion +2 mg, spinach +1 mg, arugula +1 mg. For precise label-level data, look up your exact pizza in USDA FoodData Central.
Factors Affecting Accuracy
- Sauce quantity: A heavily sauced slice can contain twice the tomato sauce of a lightly sauced one, changing vitamin C by several milligrams.
- Cooking time and heat: Vitamin C degrades with heat; longer baking or reheating lowers the amount that survives.
- Slice weight: The base values assume about 110 g per slice. A 150-g deep-dish slice will dilute the per-100-g number even if total vitamin C increases.
- Ingredient variability: Fresh vegetables differ in vitamin C content depending on season, ripeness, and storage.
- Topping portions: The booster amounts assume a typical restaurant handful; an extra-large topping portion adds more.
Frequently Asked Questions
Is pizza a meaningful source of vitamin C?
It can be surprising but real: two veggie-heavy slices can contribute 20–40 mg, covering 20–45% of the 90 mg Daily Value. A plain white pizza, by contrast, is nearly negligible.
Why is tomato sauce the main contributor?
Tomatoes naturally contain vitamin C, and pizza sauce is concentrated, so one slice's sauce alone usually provides several milligrams. Cooking reduces it, but the concentrated sauce still contributes more than most other pizza ingredients.
Does reheating pizza destroy vitamin C?
Some loss is inevitable, but not total. Microwaving or oven reheating a slice typically reduces remaining vitamin C by 10–30%, depending on time and temperature.
For more on vitamin C requirements and function, see the NIH Office of Dietary Supplements fact sheet.