By Bill Ohaire | Published: April 2026 | Last Updated: April 2026
Quick Answer
Gas BBQ: 10-15 minutes with lid closed. Charcoal BBQ: 20-30 minutes until coals are ashed over (grey).
Preheat Times by BBQ Type
| BBQ Type | Preheat Time | Ready When |
| Gas BBQ | 10-15 minutes | Thermometer reads target temp, grate is hot enough to sizzle on contact |
| Charcoal (chimney starter) | 15-20 minutes to light, then 5-10 minutes after dumping | Coals are 80% ashed over (grey/white), heat is steady |
| Charcoal (no chimney) | 25-35 minutes | Same as above — patience is key |
| Kamado (eg Big Green Egg) | 15-20 minutes | Target temp reached, temp is stable for 5+ minutes |
Why Preheating Matters
- Prevents sticking: A hot grate carbonises proteins on contact, creating a non-stick surface
- Better sear: Maillard reaction (browning) requires high surface temperature
- Even cooking: The entire grate and BBQ body reach a uniform temperature
- Food safety: Ensures the cooking surface kills bacteria on contact
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Frequently Asked Questions
How long to preheat a gas BBQ?
Preheat a gas BBQ for 10-15 minutes with the lid closed and all burners on high.
How long to preheat a charcoal BBQ?
A charcoal BBQ takes 20-30 minutes. Use a chimney starter for the fastest, most reliable results.
Related BBQ Guides
Sources & References
1
AmazingRibs.com
The science of BBQ — temperature guides, techniques, and recipes backed by food science.
Reference