Orton Cone Chart List

Orton Cone Chart

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Orton Cone & Temperature Equivalents

Large | Cone | Small

270°F 150°C 540°F 300°C (Degree Per Hour Climb)

1112 600 022 1165 630

1137 614 021 1189 643

1175 635 020 1231 666

1261 683 019 1333 723

1323 717 018 1386 752

1377 747 017 1443 784

1458 792 016 1517 825

1479 804 015 1549 843

1540 838 014 1596 870

1566 852 013 1615 880

1623 884 012 1650 900

1641 894 011 1680 915

1641 894 010 1686 919

1693 923 09 1751 955

1751 955 08 1801 983

1803 984 07 1846 1008

1830 999 06 1873 1023

1915 1046 05 1944 1062

1940 1060 04 2008 1098

2014 1101 03 2068 1131

2048 1120 02 2098 1148

2079 1137 01 2152 1175

2109 1154 1 2154 1179

2124 1162 2 2154 1179

2134 1168 3 2185 1196

2167 1186 4 2208 1209

2185 1196 5 2230 1221

2232 1222 6 2291 1255

2264 1240 7 2307 1264

2305 1263 8 2372 1300

2336 1280 9 2403 1317

2381 1305 10 2426 1330

2399 1315 11 2437 1336

2419 1326 12 2471 1355

Remember, firing a kiln is an art, not a science. Many factors affect how and when a cone will drop and whether it is an accurate reflection of what is happening to your clay an glazes.

*Temperature equivalents in this table reflect a per hour rate of climb, which affects bend temperature.

Note: Kiln sitters take Junior (small) Cones only. Senior (Large) cones and Junior cones are not designed to bend at the same temperatures. Rate of heat rise affects bend temperature.

Caution: Only look into the peepholes using protective glasses.

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