1 upwas is equal to how many upwas
Your question seems to be asking for a comparison or conversion between "upwas" and itself. In Jainism, upwas (also spelled upvaas or upavas) simply means "fasting"—specifically abstaining from all food and at times even water, for a set period (usually sunrise to sunrise).
So, 1 upwas is equal to 1 upwas.
If you meant to ask about the equivalence of upwas with other forms of fasting (like ekasana, ayambil, etc.), please clarify your question, and I can provide a detailed answer about the different types of fasting observed in Jainism.