Gammon Cooking Time Chart
| Weight | Cooking time | Internal temp |
|---|---|---|
| 3 lb | 1 hr 14 min | 154°F |
| 4 lb | 1 hr 33 min | 154°F |
| 5 lb | 1 hr 51 min | 154°F |
| 6 lb | 2 hr 9 min | 154°F |
🌡️ Stop guessing — check the real temperature
A fast digital meat thermometer is the only way to know your roast is safely and perfectly cooked. Pull it at the exact internal temperature, every time.
See top meat thermometers →🍳 Roasting kit that gets results
A heavy roasting pan, a leave-in probe and a sharp carving knife make a real difference to your roast.
Shop roasting equipment →Advertisement
How This Calculator Works — Formula & Method
Source: standard US roasting guidance · applied deterministically · verify with a thermometer
| Constant | Value | Source |
|---|---|---|
| Time per lb | 18 min/lb (range 18–22/500 g) | US roasting guides |
| Internal target | 154°F / 68°C | USDA / thermometer |
| Base offset | 20 min | Standard |
| Oven | 350°F | Method |
| Resting | 15 min | Best practice |
— Gammon cooking time —
total_min = min_per_500g × (weight_lb × 453.592 / 500) + base_offset
range = [lo_per_500g … hi_per_500g] × (weight / 500) + base_offset
conventional_oven = fan_temp + 10–20°C (same time)
celsius = derived table from °F
— algorithm —
lookup(meat, cut, doneness) → point_estimate → guidance_range
→ internal_target_temp → verify_with_thermometer()
total_min = min_per_500g × (weight_lb × 453.592 / 500) + base_offset
range = [lo_per_500g … hi_per_500g] × (weight / 500) + base_offset
conventional_oven = fan_temp + 10–20°C (same time)
celsius = derived table from °F
— algorithm —
lookup(meat, cut, doneness) → point_estimate → guidance_range
→ internal_target_temp → verify_with_thermometer()
Public roasting guidance applied deterministically — this is not a food-safety authority. Always cook to the stated internal temperature, measured with a meat thermometer.
Frequently Asked Questions
About 18 minutes per lb plus 20 minutes at 350°F, to 154°F internal. Simmer 20 min per 500 g, or foil-roast then glaze uncovered. Internal 68°C.
Cook at 350°F / 180°C. Internal target 154°F. Rest 15 minutes.