# Korea convenience food nutrition sum

> The Korea Convenience Food Guide nutrition sum adds label values for the amounts you ate and marks any total with a missing value as incomplete.

Each item is converted with value at the basis × amount eaten ÷ basis amount. Only values you type from your own package are used.

Written by the Hanipgyeol Food Study Group on October 22, 2026. Canonical address: https://kcstorefood.org/tools/nutrition-sum.

## How does the convenience food nutrition sum calculate?

Value at the basis × amount eaten ÷ basis amount, for each nutrient and item, then added up.

**Worked examples with made-up values (not real foods)**

| Input | Result |
| --- | --- |
| A: 200 kcal per 100 g, 150 g eaten | 300 kcal, shown with the formula × 150 ÷ 100 |
| A: 10 g protein; B: protein not provided | Confirmed subtotal 10 g; total incomplete; B is not counted as 0 |
| Basis 0, or g basis with ml eaten | Calculation held; no NaN or infinity |

## What happens to a blank value in the nutrition sum?

It is reported as not provided, and the total for that nutrient is marked incomplete.

## Why does the nutrition sum refuse to mix ml and g?

Converting between them needs the food’s density, which labels do not give.

**When the nutrition sum holds a calculation**

| Condition | Shown as |
| --- | --- |
| Basis amount missing or 0 | Held: enter a basis amount above 0 |
| Amount eaten missing | Held: enter the amount eaten |
| Basis in g, amount in ml (or the reverse) | Held: units differ |

Korea Convenience Food Guide does not decide whether a product is safe for you, vegetarian, vegan or halal. Recipes and packaging change, so the label on the package you bought always takes precedence over anything shown here.

## What else do people ask about convenience food nutrition sum?

### Does the nutrition sum use a nutrition database?

Not yet. It uses only the values you copy from your package until a dated MFDS DB snapshot is collected and matched to products.

### Is a blank treated as zero?

No. A blank is shown as not provided and the total is marked incomplete.

### Can it convert ml to g?

No. That needs the food’s density, which labels do not give.

### Is the total a health score?

No. It is arithmetic on printed values only.

### Is anything I enter stored?

No. It runs in your browser and nothing is sent or stored.

## What should you read next?

- [Korean convenience food allergen labels](https://kcstorefood.org/articles/allergen-labels)
- [Korean convenience food nutrition label comparison](https://kcstorefood.org/articles/nutrition-labels)
- [Korea convenience food label finder](https://kcstorefood.org/tools/food-label-finder)
- [Korea food nutrition reference basis](https://kcstorefood.org/statistics/nutrition-basis)

## Where does this information come from?

- [Food nutrient DB information (Open API)](https://www.data.go.kr/data/15127578/openapi.do) - Ministry of Food and Drug Safety
- [National integrated food nutrient standard data](https://www.data.go.kr/data/15100064/standard.do) - MFDS, Rural Development Administration and Ministry of Oceans and Fisheries