⚖️ Comparison · Updated for 2026
Gas Mark vs Celsius (°C)
Side-by-side comparison, when-to-use-each guide, and instant conversion. Reviewed for 2026.
Quick answer: Gas mark 4 = 180°C = 350°F — the standard 'moderate' baking temperature. Gas marks run 1 (very low, 140°C) to 9 (very high, 240°C). UK recipes pre-1980 often only give gas marks; modern UK recipes use °C. Fan-assisted ovens need 20°C less.
Decision guide — when to use which
Use Gas Mark when…
Older UK recipes, British baking heritage books, gas-only cookers without °C dial.
Use Celsius (°C) when…
Modern UK, European and Australian recipes. Precision temperature control.
📊 Side-by-side comparison
| Aspect | Gas Mark | Celsius (°C) |
|---|---|---|
| Very low | Gas ¼-1 | 120-140°C |
| Low | Gas 2 | 150°C |
| Moderate | Gas 4 | 180°C |
| Hot | Gas 6 | 200°C |
| Very hot | Gas 8-9 | 230-240°C |
| Fan oven note | Same | Reduce by 20°C |
Frequently asked
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What is gas mark 4 in Celsius?
180°C (350°F). This is the most common baking temperature — Victoria sponge, most biscuits, roast chicken (after initial high heat). If a recipe says 'moderate oven', it means gas mark 4 / 180°C.
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My oven only has numbers, not degrees. What are they?
Most electric ovens with a numeric dial use a 1-10 scale roughly mapping to 110°C-240°C (10°C per step), though calibration varies by brand. Compare to the gas mark table and always use an oven thermometer for verification.
Reviewed for 2026. All conversion factors and historical references verified against official sources (ISO standards, government weights & measures legislation, IEC technical specifications). Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project. We don't sell SEO links or accept paid placements in this content.