The Savings Goal Calculator tells you how many months and years it will take to reach a target amount, given what you already have and how much you save each month.
Amount needed = Goal − Current savings; Months = ceil(Amount needed ÷ Monthly saving).
To reach 5,00,000 with 50,000 saved and 10,000/month: needed = 4,50,000, time = 45 months (3y 9m).