You can use the formula below to calculate it,
Dollar Value = (Pip Value of 1 Lot) × (Your Lot Size)
Examples
1 lot EURUSD = $10 per pip
0.1 lot EURUSD = $10 × 0.1 = $1 per pip
1 lot USDJPY ≈ $9.17 per pip
0.1 lot USDJPY ≈ $0.917 per pip
Note: For any USD pair:
0.1 lot ≈ $1 per pip
For any JPY pair:
0.1 lot ≈ $0.9 per pip