1/2 Cup Panko in Grams
1/2 cup of panko weighs 25 g (spooned and levelled, King Arthur Baking). Light, airy Japanese breadcrumbs; very low density per cup. All the figures on this page are approximate conversions based on the King Arthur Baking value, so when a recipe really matters, verify with a kitchen scale. Panko is the lightest crumb in the kitchen: a full cup weighs just 50 g, which means a half cup is almost nothing on the scale, and that is exactly why it is so easy to get wrong. A fluffy handful looks like a lot, a pressed cup looks like almost nothing, and only the scale tells the truth.
Why half a cup of panko is a useful amount
Half a cup of panko is the amount that serves one or two people, fills a loaf of bread, or thickens a batch of soup, and it is an amount where the cup is surprisingly unreliable. Grains and flakes vary in size, settle in the bag, and pack differently when they are whole, rolled, cut or ground, so a level half cup can weigh several grams more or less depending on the form. Crispy coatings for fried and baked foods. The table below is built from the published King Arthur Baking weight for panko measured spooned and levelled, so you can weigh a batch once and repeat it exactly.
Panko cups to grams conversion table
| Cups | Grams | Tablespoons (approx.) |
|---|---|---|
| 1/4 cup | 12.5 g | 0.8 g |
| 1/3 cup | 16.7 g | 1 g |
| 1/2 cup | 25 g | 1.6 g |
| 2/3 cup | 33.3 g | 2.1 g |
| 3/4 cup | 37.5 g | 2.3 g |
| 1 cup | 50 g | 3.1 g |
| 1 1/2 cups | 75 g | 4.7 g |
| 2 cups | 100 g | 6.2 g |
| 3 cups | 150 g | 9.4 g |
| 4 cups | 200 g | 12.5 g |
The tablespoon column is a bonus for recipes that call for a spoonful or two: one tablespoon of panko weighs about 3.1 g, and one teaspoon about 1 g. A cup is 16 tablespoons, so the numbers in the table are just the cup weight divided by 16, rounded to one decimal place. For small amounts a scale that reads to the gram is far more reliable than a spoon, because a heaped tablespoon can weigh half as much again as a level one.
How the weight was measured
Spooned and levelled means spooning the ingredient into the measuring cup until it is heaped, then sweeping a straight knife across the top to level it off. Never scoop the cup through the bag or jar, and never tap the cup down, because both pack the ingredient and add weight.
The source for the 50 g figure is King Arthur Baking, and the confidence in the value is high. King Arthur Baking publishes a standard ingredient weight chart that recipe developers use as a reference, and this page follows it exactly rather than averaging across sources, because an average of two different measuring methods is a number that matches nobody's cup.
Worked examples
A tray of panko chicken
A tray of panko chicken for a family uses 1/2 cup of panko, which is 25 g, seasoned with salt and pepper. The panko has to be weighed loosely, without pressing it down, because a pressed cup can weigh half as much again. Weighing 25 g keeps the coating crisp without being patchy, and the chicken should be patted dry first, or the crumbs slide off in the pan.
A batch of panko prawns
A batch of panko prawns for a party calls for 1/2 cup of panko, which is 25 g, pressed gently onto the prawns after an egg wash. The panko fries into a shatteringly crisp shell, so its weight decides whether every prawn is coated or only some are. Weighing 25 g keeps the coating even, and the oil must be hot enough to sizzle, or the panko absorbs oil and turns greasy.
A gratin topping for a dinner party
A gratin for a dinner party is topped with 1/2 cup of panko, which is 25 g, tossed with butter and parmesan. The panko stays crisp longer than ordinary crumbs, so its weight decides whether the topping is golden or patchy. Weighing 25 g keeps the topping even, and the crumbs should go on just before baking, or they absorb the sauce and turn soggy.
When this conversion matters most
This conversion matters most when a grain is the backbone of the dish. In a pilaf, the weight of panko against the water decides whether the grains stay separate or turn to mush; in bread, it decides how much water the dough needs; in a coating, it decides whether the crust is crisp or patchy. A cup measure hides all of that behind how settled the bag is, so two cooks following the same recipe with cups can end up with different results. Weighing removes the guesswork and tells you exactly how much of a staple a recipe really needs, which also makes shopping and costing far easier.
Common mistakes with panko
- Mixing grain forms. Whole, rolled, cut and ground forms of the same grain weigh differently per cup, so a half cup of one is not a half cup of another. Use the weight for the exact form the recipe calls for.
- Scooping from a settled bag. Grains settle in storage, so a scooped half cup from the bottom of the bag weighs more than a spooned one from the top. Stir the bag first, then spoon and level.
- Measuring cooked instead of dry. Cooked grains absorb water and weigh two to three times as much as dry ones. Always weigh grains dry unless the recipe explicitly says cooked.
- Guessing the water ratio. A cup of grain and a cup of water are not a ratio you can scale by eye: the ratio is by weight. Weigh the grain, then measure the water to match.
Storage and handling
Airtight container, cool and dry, up to 6 months. Keeping panko stored properly also keeps its weight per cup stable: an ingredient that has absorbed moisture from the air weighs more per cup than a dry one, so a sealed container is not just about freshness, it is about measurement accuracy too. If a bag has been open for months in a humid kitchen, the first thing to do before a precise bake is to weigh the ingredient rather than trusting the cup.
Frequently asked questions
How many grams is 1/2 cup of panko?
1/2 cup of panko weighs 25 g, measured spooned and levelled according to King Arthur Baking. That is the figure to use when converting a recipe from cups to grams, and it is the value the conversion table on this page is built on.
How do I measure panko without a scale?
Spooned and levelled means spooning the ingredient into the measuring cup until it is heaped, then sweeping a straight knife across the top to level it off. Never scoop the cup through the bag or jar, and never tap the cup down, because both pack the ingredient and add weight. That gives the closest result to 25 g per half cup, but it is still an estimate: the honest answer is that a scale is the only way to know the exact weight, and a basic digital kitchen scale costs less than a bag of good flour.
Does panko always weigh the same per cup?
No. Brand, grind, moisture and how settled the container is all shift the weight by a few grams, and for some ingredients the swing can be much larger. The 50 g figure is the standard King Arthur Baking value for panko measured spooned and levelled, and it is the right default, but when a recipe is precise, weigh the ingredient and trust the scale over the cup.
Can I use the same conversion for a different brand of panko?
Yes, as a starting point. The 50 g figure is a standard average for panko, and most brands sit within a few grams of it. If you cook with one brand all the time, weigh one cup of it once and note the number on the bag, and you will have a conversion tuned to your own kitchen.
Why is panko so much lighter than ordinary breadcrumbs?
Because panko is made from crustless bread baked with an electric current, which gives it large, airy flakes that trap a lot of air. A half cup of panko is 25 g, while a half cup of ordinary breadcrumbs is 56 g, and the difference is all air. That lightness is also why panko fries crisper: the flakes have more surface area and less density, so they brown fast without absorbing oil. Never press panko down in the cup, or you lose the very thing that makes it special.
How should I store panko?
Airtight container, cool and dry, up to 6 months. Good storage keeps the ingredient fresh and keeps its weight per cup consistent, because moisture absorbed from the air adds grams that the recipe did not ask for.
Related conversions
Use the cups to grams converter, tablespoons to grams converter, weight converter, rice cooker calculator for instant answers, or browse the cups to grams hub for the full ingredient list. Related pages: White Rice in cups to grams, Brown Rice in cups to grams, Rolled Oats in cups to grams. See also our disclaimer about approximate conversions.