With the following I guess you can find what you need:

Radiation : 1 cal cm-2 d-1 --> 0.041868 MJ m-2 d-1
1 MJ m-2 d-1 --> 23.884 cal cm-2 d-1
--> 0.408 mm d-1
1 mm d-1 --> 2.45 MJ m-2 d-1
--> 58.6 cal cm-2 d-1
1 Wm-2 --> 0.0864 MJ m-2 d-1
--> 2.064 cal cm-2 d-1

Alexis Gutierrez
BRGM / EAU
3 Av. Claude Guillemin
BP 6009
45060 Orléans Cedex 2
FRANCE
Tel: 02 38 64 30 31
Fax: 02 38 64 34 46


-----Message d'origine-----
De : Shruthi BV [mailto:shruthi_iirs@...]
Envoyé : jeudi 2 mars 2006 07:45
À : hydrologymodel@...
Objet : [hydrologymodel] conversion

Dear all,

I have estimated monthly PET using Mintz-Thornthwaite method. The output is
in W/sq.m (watts per sq.m). I want it to convert from W/sq.m to mm/month
or m/month. I went through a lot of literature but I am unable to find the
conversion factor for it. Can u tell me the conversion factor or how to
convert it.