165°C is 329°F, Gas Mark 3–4, and 145°C fan/convection. Classified as a Very Slow Oven, it is the equivalent of the US standard 325°F (163°C) — effectively the same temperature. Ideal for gentle sponges, pavlova, shortbread, slow-roasted meat, and anything that benefits from patient, low heat without heavy browning.
CELSIUS
165°C
conventional
FAHRENHEIT
329°F
US ≈ 325°F
GAS MARK
Gas 3–4
UK gas ovens
FAN / CONVECT
145°C
−20°C from conv.
💡 Fan/convection oven: set to 145°C. Fan-assisted (partial fan): use 155°C. 165°C is the metric equivalent of the US 325°F — recipes calling for 325°F are effectively the same temperature.
165°C sits just above the threshold for meaningful Maillard browning, producing a faint golden colour rather than deep browning. It is the temperature where most classic British sponges were historically baked before fan ovens became standard, and it remains the go-to for pale-topped cakes, slow-roasted meats, and delicate egg dishes.
RECIPE TIMING GUIDE AT 165°C
Gentle Victoria sponge
30–35 min
Springy to touch, skewer clean, pale golden top.
Light muffins (standard)
18–22 min
Risen, pale dome, skewer clean from centre.
Slow-roast chicken legs
90–110 min
Internal 75°C+, juices run clear, skin soft not crisp.
Shortbread rounds
22–28 min
Ivory coloured, not golden. Firm when completely cool.
Pavlova base (20cm)
65–80 min
Crisp shell. Leave in switched-off oven 1 hour to cool.
Banana / lemon loaf cake
55–70 min
Skewer clean, slight crack on top is perfectly normal.
Baked rice pudding
90–120 min
Skin formed on top, thick and creamy underneath.
Slow-roast shoulder of pork
3–4 hours
Fall-apart texture. Internal temperature 90°C+.
Sponge fingers (ladyfingers)
12–15 min
Pale, firm, dry to touch. Cool on rack immediately.
Egg custard (large dish)
45–60 min
Water bath. Set at edges, slight wobble in centre.
Times are approximate. Always check doneness — oven calibration varies. Use a thermometer for meat.
165°C
Conventional (fan off)
Standard setting. Heat from top and bottom elements. Rotate halfway for even results.
145°C
Fan / Convection
Reduce by 20°C. Fan circulates air — faster and more even. Check 5–10 minutes before end time.
155°C
Fan-assisted (partial fan)
Reduce by 10°C. Common in modern ovens. More even than conventional, slightly faster.
Gas 3–4
Gas Mark
Between Gas 3 (160°C) and Gas 4 (180°C). Gas ovens are more humid — great for slow-roasting.
Simmering oven
AGA / Rayburn
The simmering oven (120–170°C) is ideal. Use the lower end for custards, upper end for cakes.
165°C
180°C
Most domestic ovens are 10–30°C off their dial. At 165°C, inaccuracy matters more than at higher roasting temperatures — especially for sponges and pavlova where a 20°C error changes the entire outcome.
Oven runs hot
Fix: Set dial to 148–152°C
Oven runs cool
Fix: Set dial to 178–182°C
Oven accurate
Fix: Use 165°C exactly as written
Best fix: An oven thermometer (£5–10 / $8–15) tells you your oven's true temperature. Preheat for 20 minutes, read the thermometer, note the offset, and adjust every bake.
| °C | °F | Gas Mark | Fan °C | Oven type | Best for |
|---|---|---|---|---|---|
| 160°C | 320°F | Gas 3 | 140°C | Very Slow / Cool | Meringues, cheesecakes, custards |
| 165°C | 329°F | Gas 3–4 | 145°C | Very Slow | Gentle sponges, pavlova, shortbread |
| 170°C | 338°F | Gas 3–4 | 150°C | Slow | Victoria sponge, banana bread |
| 180°C | 356°F | Gas 4 | 160°C | Moderate | Cakes, brownies, roast chicken |
| 190°C | 374°F | Gas 5 | 170°C | Mod. Hot | Puff pastry, roast potatoes |
| 200°C | 392°F | Gas 6 | 180°C | Hot | Bread, roast beef, jacket potatoes |
| 220°C | 428°F | Gas 7 | 200°C | Very Hot | Yorkshire pudding, pork crackling |
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165°C = 329°F = Gas Mark 3–4 = 145°C fan · Very Slow Oven · US equivalent: 325°F (163°C) · Fan ovens: −20°C · Preheat 15+ minutes