🔥 Charcoal Calculator
Enter your grill size, target heat, and cook time to see how many briquettes to light — a starting load plus a top-up for longer sessions, so you never run cold halfway through.
🔥 Size Your Fire
What is a Charcoal Calculator?
It takes the guesswork out of lighting the grill. From your grate diameter it works out the cooking area, scales the fuel to your chosen heat level, and adds a per-hour top-up for longer cooks — so instead of dumping in a random pile of coals you get a sensible starting load and a total for the whole session.
Use it to light the right amount for a quick sear or a long, low cook, to avoid the frustration of a fire that dies before the food is done, and to stop wasting charcoal on short grills. Real fuel use shifts with wind, weather, and briquette brand, so keep a chimney of spares ready and add coals before the fire fades.
❓ Frequently Asked Questions
How does the charcoal calculator work?
It sizes a starting load of briquettes from your grill's grate area and target heat — low, medium, or high — then adds a per-hour top-up for cooks running longer than an hour, since charcoal burns down over time. Enter your grill diameter, heat level, and cook length to get a base load and a total.
How many briquettes do I actually need?
As a rough guide, a full 22-inch kettle takes roughly 80–100 briquettes for high, searing heat and far fewer for a gentle cook. This calculator scales that to your grill size and heat level so you light the right amount instead of wasting fuel or running short mid-cook.
Should I use a chimney starter or lighter fluid?
A chimney starter is the better choice: it lights a full load evenly in about 15 minutes using only newspaper, with no chemical taste and no flare-ups. Lighter fluid can leave an off flavor and lights unevenly. Once the coals are ashed over and glowing, pour them out and arrange them for direct or two-zone cooking.
What is a two-zone fire and how much charcoal does it need?
A two-zone fire banks the lit coals on one side of the grill for searing and leaves the other side empty for gentler, indirect cooking. You typically use the same total amount of charcoal as a single-zone fire, just piled to one side — so the totals here still apply; you're only changing how you arrange the coals.