Fahrenheit to Celsius Chart
Fahrenheit to Celsius in five-degree steps across the range a thermostat, an oven and a weather forecast actually cover. The two scales cross at −40, where both read the same number.
Source data and formula checked · How we check
Fahrenheit to Celsius Chart reads converted value straight off temperature, for 59 values from -40 to 250. Every row is computed from the same formula the calculator uses, not measured or copied from another table, so a value between two rows can be worked out the same way. The formula is the one published by NIST.
| Temperature | Converted value | In Kelvin |
|---|---|---|
| -40 | -40.00 | 233.15 K |
| -35 | -37.22 | 235.93 K |
| -30 | -34.44 | 238.71 K |
| -25 | -31.67 | 241.48 K |
| -20 | -28.89 | 244.26 K |
| -15 | -26.11 | 247.04 K |
| -10 | -23.33 | 249.82 K |
| -5 | -20.56 | 252.59 K |
| 0 | -17.78 | 255.37 K |
| 5 | -15.00 | 258.15 K |
| 10 | -12.22 | 260.93 K |
| 15 | -9.44 | 263.71 K |
| 20 | -6.67 | 266.48 K |
| 25 | -3.89 | 269.26 K |
| 30 | -1.11 | 272.04 K |
| 35 | 1.67 | 274.82 K |
| 40 | 4.44 | 277.59 K |
| 45 | 7.22 | 280.37 K |
| 50 | 10.00 | 283.15 K |
| 55 | 12.78 | 285.93 K |
| 60 | 15.56 | 288.71 K |
| 65 | 18.33 | 291.48 K |
| 70 | 21.11 | 294.26 K |
| 75 | 23.89 | 297.04 K |
| 80 | 26.67 | 299.82 K |
| 85 | 29.44 | 302.59 K |
| 90 | 32.22 | 305.37 K |
| 95 | 35.00 | 308.15 K |
| 100 | 37.78 | 310.93 K |
| 105 | 40.56 | 313.71 K |
| 110 | 43.33 | 316.48 K |
| 115 | 46.11 | 319.26 K |
| 120 | 48.89 | 322.04 K |
| 125 | 51.67 | 324.82 K |
| 130 | 54.44 | 327.59 K |
| 135 | 57.22 | 330.37 K |
| 140 | 60.00 | 333.15 K |
| 145 | 62.78 | 335.93 K |
| 150 | 65.56 | 338.71 K |
| 155 | 68.33 | 341.48 K |
| 160 | 71.11 | 344.26 K |
| 165 | 73.89 | 347.04 K |
| 170 | 76.67 | 349.82 K |
| 175 | 79.44 | 352.59 K |
| 180 | 82.22 | 355.37 K |
| 185 | 85.00 | 358.15 K |
| 190 | 87.78 | 360.93 K |
| 195 | 90.56 | 363.71 K |
| 200 | 93.33 | 366.48 K |
| 205 | 96.11 | 369.26 K |
| 210 | 98.89 | 372.04 K |
| 215 | 101.67 | 374.82 K |
| 220 | 104.44 | 377.59 K |
| 225 | 107.22 | 380.37 K |
| 230 | 110.00 | 383.15 K |
| 235 | 112.78 | 385.93 K |
| 240 | 115.56 | 388.71 K |
| 245 | 118.33 | 391.48 K |
| 250 | 121.11 | 394.26 K |
Questions people actually ask
- How do I read the Fahrenheit to Celsius Chart?
- Find your temperature in the first column and read across. At -40 the converted value is -40.00; at 250 it is 121.11. The table runs from -40 to 250 in 59 rows.
- How much does the converted value change per row?
- By 2.78 for every 5 of temperature, and by the same amount everywhere in the table — the relationship is a straight line, so halfway between two rows is halfway between their two answers. That is what makes reading between the rows safe here.
- What if my temperature is outside the table?
- The chart covers -40 to 250, which is the range people actually look up. Anything above or below goes into the calculator, which takes any figure and shows each step of the working rather than only the result. Open the temperature converter.
- Where do these numbers come from?
- Every row is computed at build time from the formula published by NIST, by the same code behind the calculator — not transcribed from another table, which is how a rounding error in one chart ends up in twenty.
Need a different number?
The chart covers the common values. For anything between the rows, the temperature converter takes any figure and shows the working.
Source: NIST — SI units and temperature scales, BIPM — the kelvin and the International System of Units