There are ways to know if your faith is effective.
"Now faith is the substance of things hoped for; the evidence of things not seen." (Hebrews 11:1)
Your faith is effective when you depend on God. When the persistent widow went to the king for justice, she depended on him because she had no other resource (Luke 18:1-8). As long as we depend on others, we will not fully depend on the King. Your human resources might be dwindling because God wants you to depend more on Him.
Effective faith grows. If your faith is stagnant, it is ineffective. Almost invisible at first, faith grows underground like the roots of a tree. When the roots are watered by the word, the tree grows and spreads far from its original planting. Then the tree flourishes, becomes visible and bears fruit. Effective faith does the same.
Effective faith shows up more under pressure. Going through challenges is the time when effective faith kicks in. It is at those times that your faith is tested. If you say you have faith but never get to prove it, how do you know you really have it?
Effective faith is hopeful anticipation and quiet certainty. We demonstrate effective faith when we look forward to daily opportunities with excitement and confident that whatever we face will be worked out for the glory of God.
Even though faith cannot be measured, we know we have effective faith when we base our entire lives not on what we can do but on what has already been done through JESUS CHRIST.