* Maker lists only total area (main grate plus racks), so the real grate is smaller. Areas come from each maker's spec page; see all grills.
How we calculate
Usable area is the grate area times the usable share (85% by default: edges run cooler and you need room to flip).
Pieces per batch = usable area ÷ space per piece × 0.8 (0.9 on a griddle), rounded down.
Batches = pieces ÷ pieces per batch, rounded up. Longest items cook first; time is batches × minutes per batch.
Pieces per guest match our party-size guides: 2 burgers, 1.5 chicken pieces or 2 sausages; burgers and hot dogs 1.2 + 0.8.
Fuel: a chimney of charcoal gives about an hour of grilling (as on our charcoal calculator); gas at about 60% of rated BTU with 21,548 BTU per lb of propane.
Item
Space per piece
Time per batch
Note
Burger patty 4 oz
18 sq in
10 min
4-inch patty on a 4.25 x 4.25 inch square (a little room to flip), cooked to 160°F
Burger patty 5 oz
22 sq in
11 min
4.5-inch patty
Burger patty 6 oz
26 sq in
12 min
5-inch patty
Hot dog
6 sq in
8 min
6 x 1 inch, turned twice
Bratwurst or sausage link
8 sq in
15 min
raw links to 160°F
Chicken piece, bone-in thigh or drumstick
20 sq in
35 min
indirect then direct, to 165°F (175°F+ for thighs)
Chicken breast, boneless
25 sq in
18 min
to 165°F
Corn on the cob
10 sq in
15 min
in husk or foil
Vegetable skewer
12 sq in
12 min
Space per piece is measured from typical sizes with room to flip; times are typical for medium-high direct heat, always check with a thermometer. Data as of Oct 2026. Full list of sources: How we calculate.
Weber Original Kettle 22", most standard gas grills
26 inch
508 sq in
15–25 guests
Weber Master-Touch 26"
36 inch griddle
768 sq in
25–50 guests
Blackstone 36", Camp Chef 36"
Offset smoker (mid)
500–800 sq in
20–40 guests
Oklahoma Joe's, Char-Griller
Large offset / trailer
1,000+ sq in
50+ guests
Lang, Yoder, custom pits
How to Calculate What Grill Size You Need
The formula: (sq in per item) × (items per person) × (guests ÷ batches).
For burgers at a party of 20 cooking in 2 batches: a burger patty needs about 20 sq in of grate space (a 4-inch patty + clearance). Each guest eats 2 patties = 40 sq in per guest. For 20 guests in 2 batches: 20 × 40 ÷ 2 = 400 sq in minimum. That's slightly bigger than a standard 22-inch kettle (363 sq in), so a 26-inch or gas grill is the right call.
Space requirements by meat type
Burger patty (4-inch): ~20 sq in including spacing, 2 per person
Bone-in chicken piece: ~28 sq in, 1–2 pieces per person
Half rack of ribs: ~70 sq in, ½ rack per person
Sausage / hot dog: ~12 sq in, 2–3 per person
Batch cooking vs single cook
Most backyard BBQs use batch cooking, you grill the first round, let guests start eating, then put the next batch on. This cuts your required grill area roughly in half. For a sit-down dinner where everyone eats at once, you need the full area in one go.
Grill Size by Guest Count, Cheat Sheet
1–6 guests
150–240 sq in · 18" kettle
8–12 guests
300–380 sq in · 22" kettle
15–20 guests
380–500 sq in · 26" or gas grill
20–30 guests
500–650 sq in · large gas or offset
30–50 guests
650–900 sq in · 36" griddle or offset
50–100 guests
900–1500 sq in · trailer smoker
Know your grill size? Now figure out exactly how much meat to buy.
For 10 guests cooking burgers in batches, a standard 22-inch kettle (363 sq in) is sufficient, you'll cook about 13 patties per batch, enough to feed everyone in one or two rounds. If you're cooking ribs or chicken for 10, the 22-inch also works but you'll need two batches or a second grill level (like a smoker with dual grates).
What size grill do I need for 20 people?
For 20 guests, aim for 450–550 sq in if cooking in batches. A 26-inch kettle (508 sq in) or a 3-burner gas grill with a primary grate of about 450–515 sq in handles this comfortably. If you want to cook everything at once (no batches), you need 700–900 sq in, two 22-inch grills side by side is a practical solution.
What size grill do I need for 50 people?
For 50 guests, plan for at least 700–900 sq in of cooking area with batch cooking, or 1,200–1,500 sq in for a single cook. A 36-inch griddle (768 sq in) works for burgers and sausages in batches. For ribs or brisket, you'd want a mid-size offset smoker (600–900 sq in) or two grills.
Is a bigger grill always better?
Not necessarily. Larger grills use more fuel, take longer to preheat, and are harder to manage heat zones on. For most backyard parties of 10–20 people, a 22-inch or 26-inch kettle is the sweet spot, simple, efficient, and produces great results.
