High-Temperature Fahrenheit to Celsius Chart — Ovens, Kilns, Metals and Forges

The formula still works at 1,000 degrees

The rule does not change with the size of the number: subtract 32, then multiply by 5/9 (or divide by 1.8). °C = (°F − 32) × 5/9. The reverse is °F = °C × 9/5 + 32.

Worked example: 1100 °F. 1100 − 32 = 1068, and 1068 ÷ 1.8 = 593.3 °C. Another: 1350 °F. 1350 − 32 = 1318, and 1318 ÷ 1.8 = 732.2 °C. And 800 °F: 768 ÷ 1.8 = 426.7 °C.

What does break at high temperatures is the weather-style shortcut. "Subtract 30 and halve" turns 1100 °F into 535 °C — almost 60 degrees too low. The error grows with the number because the shortcut divides by 2 instead of 1.8, so for anything hotter than a kitchen, use the exact formula or the converter.

Oven dial chart: 250 °F to 500 °F

250 °F = 121.1 °C · 275 °F = 135 °C · 300 °F = 148.9 °C · 325 °F = 162.8 °C · 350 °F = 176.7 °C · 375 °F = 190.6 °C.

400 °F = 204.4 °C · 425 °F = 218.3 °C · 450 °F = 232.2 °C · 475 °F = 246.1 °C · 500 °F = 260 °C.

Recipes round these to the nearest 5 or 10 °C, which is why you will see 350 °F written as 175 °C or 180 °C. Both are fine: a home oven usually swings 10 to 15 degrees around its set point anyway, so the rounding is smaller than the oven's own wobble. Fan (convection) ovens are normally set about 20 °C (roughly 25 °F) lower than the recipe's conventional temperature.

Pizza ovens, grills and the self-clean cycle

550 °F = 287.8 °C — the top of most home oven dials, and the usual setting for pizza on a stone. 600 °F = 315.6 °C. 700 °F = 371.1 °C.

800 °F = 426.7 °C and 900 °F = 482.2 °C bracket the floor temperature of a wood-fired or gas pizza oven for Neapolitan-style pizza, which bakes in roughly 60 to 90 seconds. 1000 °F = 537.8 °C is the dome temperature some outdoor pizza ovens advertise.

A home oven's self-cleaning cycle runs in roughly the same band, around 800 to 900 °F (about 430 to 480 °C), which is why the door locks until it cools.

Melting points of common metals

These are the standard melting points of the pure metals, given in Celsius and converted exactly to Fahrenheit. Alloys melt over a range and usually lower.

Tin 231.9 °C = 449.5 °F · Lead 327.5 °C = 621.4 °F · Aluminium 660.3 °C = 1220.6 °F · Silver 961.8 °C = 1763.2 °F · Gold 1064.2 °C = 1947.5 °F · Copper 1084.6 °C = 1984.3 °F · Iron 1538 °C = 2800.4 °F.

Notice the pattern: at these temperatures the Fahrenheit number is a little under double the Celsius one (1.8 × plus 32). A quick sanity check for any reading above 500 °C is "double it, then take off a tenth": 660 °C → 1320 − 132 = 1188, plus 32 = 1220 °F.

Kiln temperatures and pyrometric cones

Potters and glass workers usually fire to a cone number rather than a temperature, because a cone measures heat work — temperature and time together. The temperatures below are the commonly published equivalents for Orton self-supporting cones heated at 270 °F per hour over the last part of the firing; a slower firing bends the same cone at a lower temperature.

Cone 06 ≈ 1828 °F = 997.8 °C (low-fire earthenware and glaze) · Cone 04 ≈ 1945 °F = 1062.8 °C (common bisque firing) · Cone 6 ≈ 2232 °F = 1222.2 °C (mid-fire stoneware) · Cone 10 ≈ 2345 °F = 1285 °C (high-fire stoneware and porcelain).

Glass fusing sits lower: a full fuse is commonly done somewhere around 1450 to 1500 °F (roughly 790 to 815 °C), and annealing much lower again. Always follow the schedule from your glass or clay maker; this chart is for converting their numbers, not replacing them.

Forge and heat-treating ranges

Blacksmiths judge steel by its glow colour, and the colours only roughly match temperature because room lighting changes what you see. As a guide: a dull red is around 1200 to 1300 °F (about 650 to 700 °C), cherry red around 1500 to 1600 °F (about 815 to 870 °C), orange around 1800 to 2000 °F (about 980 to 1095 °C), and yellow above that.

Hardening plain carbon steel is usually done around the point where it stops being attracted to a magnet, roughly 1400 to 1500 °F (760 to 815 °C), then quenched. Tempering happens far lower, typically 350 to 500 °F (about 175 to 260 °C) — inside the range of a kitchen oven. The exact temperatures depend on the steel, so treat these as a conversion aid and use the data sheet for the alloy you have.

Kelvin, for the science side

Lab furnaces and physics problems often use kelvin. Add 273.15 to the Celsius value: 593.3 °C (1100 °F) is 866.5 K; 1000 °C is 1273.15 K. To go straight from Fahrenheit, convert to Celsius first, then add 273.15.

There is no degree sign on kelvin, and it never goes negative, which is why thermodynamics uses it. For everyday heat you will almost always want °C or °F.

Quick reference: 1000 °F to 2500 °F

1000 °F = 537.8 °C · 1100 °F = 593.3 °C · 1200 °F = 648.9 °C · 1350 °F = 732.2 °C · 1400 °F = 760 °C · 1500 °F = 815.6 °C.

1600 °F = 871.1 °C · 1800 °F = 982.2 °C · 2000 °F = 1093.3 °C · 2232 °F = 1222.2 °C · 2345 °F = 1285 °C · 2500 °F = 1371.1 °C.

Each value is (°F − 32) × 5/9, rounded to one decimal place. For any number not listed, the Fahrenheit to Celsius converter gives the exact result as you type.