UK Gas Mark to °F / °C Converter
Gas Mark 1 = 275 °F = 135 °C. Each mark adds ~25 °F (~14 °C). Modern UK ovens still use this scale.
Result
Result
350 °F · 177 °C
Mark 1 = 275 °F; +25 °F per mark.
- Gas Mark4
- °F350
- °C177
Step-by-step
- Gas Mark 1 corresponds to 275 °F (135 °C).
- Each mark up adds 25 °F (≈14 °C).
- Mark 4 = 250 + 25 × 4 = 350 °F.
How to use this calculator
- Pick direction.
- Enter Gas Mark or °F.
- Read °C / °F / Mark equivalents.
About this calculator
UK gas ovens are still calibrated in Gas Marks (1 to 9), inherited from early 20th-century gas-stove makers. Mark 1 = 275 °F; each mark adds ~25 °F. Common targets: Mark 4 = 350 °F (baking), Mark 5 = 375 °F (cookies), Mark 6 = 400 °F (roast), Mark 7 = 425 °F (pizza), Mark 8 = 450 °F (high roast). The "Slow oven" / quarter mark settings (¼, ½, S) range 225-265 °F, used for rendering, low-and-slow braise, drying.
Frequently asked
Pre-thermostat gas ovens used a mechanical valve marked 1-9. The scale outlived the technology. Modern UK gas ovens print both marks and °C.
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