Let S be your regular monthly salary and your work is forty hours per week, then your hourly rate HR can be computed as:
HR = 2.5 x (S / 160)
For example, if your salary is 12,000.00 PhP, your hourly rate is
HR = 2.5 x (14,000.00 / 160)
= 218.75 PhP
Now, let's say you have a website development project that you estimate will take one month (at 160 hours per month), you can charge your client 35,000.00 PhP.
