Estimate bento box calories: pick a common bento such as chicken teriyaki and a box size, or build your own from rice, protein, sides and sauce.

Typical totals for a medium (about 600 ml) box including rice; small and large boxes scale by 0.75 and 1.3.

Optional settings

Related Calculators

Bento Box Calories Formula

Use the following formula to calculate total bento box calories.

Calories = Typical Bento Calories × Size Factor (small 0.75, medium 1, large 1.3)

Build your own adds the typical calories of each component you choose:

Calories = Rice + Main Protein + Vegetables & Sides + Sauce & Extras

Calorie Values Used

  • Cooked rice: 100, 205 or 310 calories for ½, 1 or 1½ cups
  • Main protein: 80 (tofu) to 440 (tonkatsu) calories per portion
  • Vegetables and sides: 50, 100 or 180 calories
  • Sauce and extras: 40, 90 or 180 calories
  • Ready-made bentos: about 480 (vegetable) to 880 (tonkatsu) calories for a medium box

What Is a Bento Box?

A bento box is a compartment-style meal that usually includes a grain, a protein, and vegetables. Rice is often the largest calorie source, while sauces and fried side items can raise the total quickly.

Typical Bento Box Calorie Ranges

  • Light bento with vegetables and lean protein: 250 to 350 calories
  • Balanced rice, protein, and vegetable bento: 300 to 450 calories
  • Larger bento with sauce or extra sides: 500 to 800 calories

How to Calculate Bento Box Calories

  1. Choose Pick a bento and select your bento type.
  2. Select the box size: small, medium or large.
  3. Or choose Build your own and pick the rice portion and main protein.
  4. Then pick the vegetables and sides and the sauce and extras.
  5. Press Calculate to get the total calories.

Example

Pick a bento example: a large chicken karaage bento.

Calories = 780 × 1.3 = 1,014 calories.

Build your own example: 1 cup of rice, 100 g of salmon, standard vegetables and a light sauce.

Calories = 205 + 208 + 100 + 40 = 553 calories.

Bento box meal