The
internet is dominated by North America which continues to use the
traditional imperial measurements, although the rest of the world
uses the metric system with its length, volume and weight units
inter-related. Until North America catches up with the rest of the
world, we will continue to need to convert temperatures from one
system to another.

The
conversion factors relate to the reference points of water's freezing
and boiling points.

The
Fahrenheit system has these at 32 and 212 – 180 degrees apart.

The
Celsius system has these at 0 and 100 – 100 degrees apart.

This
means the conversion rate is 9/5 to go from C to F or 5/9 to go from
F to C.

Instead
of dealing with the fractions, it is easiest to multiply or divide by
0.555 which is accurate enough for kiln forming purposes. Multiply
the Fahrenheit by 0.555 to get the Celsius equivalent. From Celsius
divide by 0.555. So a rate of advance of 200F/hr becomes 111C/hr(
20*0.555) and a rate of 80C/hr becomes 144F/hr (80/0.555). This
works fine for calculating the rate of advance.

*It
does not work for temperatures*. The complicating factor is the
water freezing point in the Fahrenheit system which is 32F. To
calculate the Fahrenheit temperature in Celsius, you first have to
subtract 32 from the Fahrenheit temperature. So to convert 212F to
C, you first have to subtract 32, giving 180 which is converted by
multiplying 180 by 0.555 which results in 99.9 which is close enough
to 100C.

To
convert from C to F you divide the C temperature by 0.555 and add 32
to the result, e.g., 515C becomes 960F (515/0.555=927.9+32=959.9)

Alternatively
you can bookmark one of the conversion sites and go to it for the
calculation, but make sure that you distinguish rate from temperature
when this calculation is done.

Some
of the common (approximate) equivalents are:

515C
= 960F a common annealing temperature

650C
= 1200F low temperature slump

677C
= 1250F standard slump temperature

750C
= 1380F angular tack/ lamination

770C
= 1420F rounded tack

800C
= 1470F full fuse

830C
= 1525F casting temperature

900C
= 1650F low temperature pot or wire melt

925C
= 1700F higher temperature pot or wire melt