Heating element calculator

1. How to heat a volume, solid, liquid or gas in a given time

Usual materials Usual Initial Temperature 
V Volume to heat in
p Weight in Kg/dm3
t1 Initial temperature in ºC
t2 Final temperature in ºC
Cp Specific heat in kcal/Kg x ºC
T Warm-up time in
Result: KW

2. Calculate W/cm 2

P Power of the heating cartridge (W)
S Surface in cm2
Result: W/cm 2