Oven temperatures · gas mark guide
240°C to gas mark
240°C is gas mark 9 and 475°F on recipe charts (464°F exactly). Check if your recipe means a fan oven: if 240°C is the fan temperature, the conventional equivalent is 260°C, which is hotter than gas mark 9, the top setting on most gas ovens.
Chart checked against Delia Smith and Waitrose on .
Gas mark
9
on the chart
Fahrenheit
475°F
464°F exactly
Fan oven
220°C
if 240°C is conventional
If 240°C is fan
Above 9
260°C conventional
Gas mark conversion chart
The row nearest to 240°C is gas mark 9.
| Gas mark | Conventional | Fan | Fahrenheit | Heat |
|---|---|---|---|---|
| Gas ¼ | 110°C | 90°C | 225°F | Very cool |
| Gas ½ | 120°C | 100°C | 250°F | Very cool |
| Gas 1 | 140°C | 120°C | 275°F | Very low |
| Gas 2 | 150°C | 130°C | 300°F | Very low |
| Gas 3 | 170°C | 150°C | 325°F | Low |
| Gas 4 | 180°C | 160°C | 350°F | Moderate |
| Gas 5 | 190°C | 170°C | 375°F | Moderately hot |
| Gas 6 | 200°C | 180°C | 400°F | Hot |
| Gas 7 | 220°C | 200°C | 425°F | Hot |
| Gas 8 | 230°C | 210°C | 450°F | Very hot |
| Gas 9 | 240°C | 220°C | 475°F | Very hot |
Conventional or fan?
UK recipes often give two figures, such as 200°C or 180°C fan. If yours just says 240°C, it usually means a conventional oven, so a fan oven should be set to 220°C and a gas oven to gas mark 9.
Exact conversion
240°C × 9 ÷ 5 + 32 = 464°F. The closest gas mark on the chart is gas mark 9, which is 240°C and 475°F.
What cooks at 240°C
Gas mark 9 is a very hot oven, the usual setting for pizza and flatbreads, and the hottest setting on most gas ovens. The nearest other setting is gas mark 8 (230°C, 450°F).
Other temperatures
- 210°C to gas mark (gas 6)
- 220°C to gas mark (gas 7)
- 230°C to gas mark (gas 8)
- 250°C to gas mark (gas 9)
gas mark 9 in full · Full gas mark conversion chart · Convert any temperature
Common questions
What gas mark is 240°C?
Gas mark 9.
What is 240°C in a fan oven?
220°C, if the recipe's 240°C is for a conventional oven.
What gas mark is 240°C fan?
A fan setting of 240°C matches 260°C in a conventional oven, which is hotter than gas mark 9, the top setting on most gas ovens.
What is 240°C in Fahrenheit?
464°F exactly, but recipes treat 240°C and 475°F as the same setting.
Sources and assumptions
- Conventional means an electric oven with the fan off. Fan settings are 20°C lower.
- Recipe charts round temperatures to the nearest 10°C or 25°F, so exact conversions differ by a few degrees.
- Delia Smith: oven temperatures and conversions (gas marks 1 to 9, fan ovens)
- Waitrose: conversion charts (gas marks ¼ and ½)
Ovens vary. An oven thermometer shows what yours is really doing.