What each food is

Oats are a whole grain that is commonly eaten as oatmeal, overnight oats, or baked into snacks. They are naturally higher in fiber than most refined grains, especially because they contain beta-glucan, a soluble fiber linked to better fullness and heart health.

Rice is a staple grain eaten worldwide in many forms, including white rice, brown rice, jasmine, basmati, and wild rice. White rice is milled and polished, which removes the bran and germ; brown rice keeps more of the grain intact and usually has more fiber and micronutrients.

Calories per 100g: the real comparison

For dry grains, oats are usually around 389 calories per 100g, while uncooked white rice is often around 365 calories per 100g. So in dry form, oats are slightly more calorie-dense.

For cooked foods, the picture changes because rice absorbs a lot of water. Cooked white rice is often about 130 calories per 100g, while cooked oatmeal made with water is often around 70 to 80 calories per 100g. This is why a serving of cooked rice can look much more calorie-dense than a bowl of oatmeal, even if the dry grains were fairly close.

Key nutrition differences

Oats usually have the edge for satiety because they contain more fiber and a bit more protein per serving than white rice. That combination can help slow digestion and make it easier to stay full between meals.

Rice is easier to digest for many people and can be a better fit when you want low fiber before training, during stomach upset, or for a lighter texture. Brown rice offers more fiber than white rice, but oats still usually win on fullness per calorie.

Pros and cons of oats vs rice

Pros of oats: more filling, higher fiber, versatile for sweet or savory meals, and usually a better choice for breakfast or appetite control. Cons: some people do not like the texture, and oats can be more calorie-dense than rice when comparing uncooked grains by weight.

Pros of rice: easy to digest, fast to cook, and flexible for many meals. Cons: white rice is lower in fiber and can be less filling per calorie, so it is easier to overeat if portions are not measured.

Which should you choose for your goal?

Choose oats if your goal is weight loss, better fullness, or a higher-fiber breakfast. Oats are also a strong pick if you want steadier energy and a meal that keeps you satisfied longer.

Choose rice if you need a quick-digesting carb, are eating before or after intense exercise, or prefer a lighter grain with a neutral taste. Brown rice is the better everyday option if you want more fiber, while white rice is useful when digestion comfort matters. If you track portions closely, Fitnit can also support consistent nutrition habits alongside workout tracking, but the main win here is simply choosing the grain that matches your goal.

Tips

• Compare foods in the same form: dry vs dry or cooked vs cooked, not one dry and one cooked.
• For weight loss, measure portions by cooked weight if that is how you eat them most often.
• Add protein and vegetables to rice-based meals to improve fullness.
• Use oats when you want a breakfast that is more likely to keep hunger down until lunch.
• Choose white rice around hard workouts if you want an easier-to-digest carb source.