Quick answer: For how much steak per person, plan about 8 oz of raw boneless steak per adult, and about 12 oz for big appetites or premium cuts, as one butcher’s planning guide suggests.
Bone-in cuts need extra weight, and every steak loses some weight on the heat. If you are deciding what to order, you can buy grass fed beef online and match the weights below to the steaks you choose.
What changes the amount you need
The right steak portion size depends on who is eating, which cut is on the plate and what else is being served. The 8 oz default suits most adults, so the useful question is which of the following moves you off it.
- Appetite. A planning guide from a home-cooking site suggests 8-10 oz of raw steak per person. Hungry meat-lovers may want about 12 oz, especially with premium cuts. Choose the upper end when the steak is the centre of the meal and the lower end when it shares the plate with heavy sides.
- Richness of the cut. Rich cuts are often served smaller, which is why filet mignon has its own row in the chart below.
- Bone. Bone is weight you pay for but do not eat. Bone-in steaks should be planned heavier than boneless ones.
- Everything else on the plate. A steak served with seafood or a generous side does not need to be as large as a steak served alone.
Steak weight chart by cut
The chart converts the guidance into raw buying weights. All values are raw, uncooked weights per adult unless the condition says otherwise.
| Cut or situation | Raw planning weight | Condition | Planning use |
|---|---|---|---|
| Boneless steak, standard adult | 8 oz (about 225 g) | Raw weight, one adult | The default for ribeye or other boneless steaks when the meal has sides. |
| Hungry eater or premium cut | 12 oz | Raw weight, one adult | Choose it when guests arrive hungry or the steak is the whole meal. |
| Filet mignon | About 6-8 oz | Often served smaller because of richness | Buy to this range rather than to a ribeye-sized portion. |
| Bone-in steak | Add a third more | On top of the boneless planning weight | Buy up so the bone does not eat into the portion. |
| Bone-in roast | Three quarters of a pound per adult | Roast, not an individual steak | Use for roasts and larger joints rather than single steaks. |
The figures come from a steak portion guide and the butcher’s planning guide cited above.
Raw weight, cooked weight and ounces of steak per serving
Ounces of steak per serving are normally quoted as raw weight, so the cooked steak on the plate is lighter than the figure on the label. According to the same home-cooking guide, grilled and roasted meats lose about 25% of their weight during cooking, and braised or slow-cooked meats can lose up to 30%.
For steaks, use the 25% figure for grilling or roasting. Treat 30% as the ceiling for slow, moist methods rather than a target. The practical consequence is that you should compare steak packs by raw weight, then expect a plated portion that looks smaller than the number on the pack.
Filet mignon and richer cuts
Filet mignon is often served in smaller portions, around 6-8 oz, because of its richness, according to the portion guide above. It suits a plated dinner where the steak is one course among several, and it is a poor choice if you want a large, knife-and-fork steak for hungry guests.
Ribeye is the cut where the larger 12 oz portion makes the most sense. The home-cooking guide singles out premium cuts as the reason hungry eaters may want that much. If your table is mixed, buy filets and ribeyes by their own weights and do not average them into one number.
Bone-in steaks and the cowboy steak
A cowboy steak is a bone-in ribeye, so the bone-in rule applies to it. The butcher’s guide says to add a third more for bone-in cuts, because you are buying bone as well as beef. A bone-in steak that weighs the same as a boneless one therefore gives you less to eat.
Roasts follow the same logic. The home-cooking guide gives about 1 lb per person for a bone-in prime rib or standing rib roast, and 8-12 oz per person for boneless roasts. The butcher’s guide is more conservative at three quarters of a pound per adult for bone-in roasts. Choose the higher figure if you want leftovers or have hungry guests, and the lower one when the roast is part of a larger spread.
Feeding a crowd and stretching the budget
A leaner, cheaper cut can serve a crowd better than a premium one. The butcher’s guide notes that a lean sirloin at 8 oz does more for eight people than a ribeye at 12 oz. Reserve the large ribeye for a small table and use sirloin when the head count grows.
Sides also matter. The portion guide notes that an 8 oz portion might shrink to 6 oz when the plate includes seafood. A steak with only a green side can stay near the full planning weight.
If you cook for a crowd often, how to buy beef in bulk explains how larger orders are organised. Households that cook steak every week can also compare a grass-fed beef subscription with one-off orders.
Fixing common portion problems
- The plate looks light. Check whether you planned from the cooked weight. The figures in this guide are raw, so the loss comes after you buy.
- The table mixes cuts. Plan each cut from its own row in the chart. A filet, a ribeye and a bone-in steak do not share one number.
- You are ordering by weight. Check whether the listed weight includes bone. A bone-in steak needs more listed weight than a boneless one.
Frequently asked questions
How big is a cowboy steak?
A cowboy steak is a bone-in ribeye. A bone-in cut of 650 g is described in the portion guide as a bold statement, so a steak at that scale is a very large serving, not a standard one. Part of its weight is bone.
How much steak do children need?
Children under 12 typically eat about half an adult portion, according to the home-cooking guide. Halve the adult weight for them, and shift to a full portion for teenagers who eat like adults.
How much steak should I buy for six people?
One lifestyle guide says that when serving 6 people steak, you can plan on buying 4.5 lb (72 oz). Add more if the steaks are bone-in.
