Just select the currencies you want to convert between, enter the amount, and the result updates instantly. The converter uses live mid-market exchange rates, which are the rates you see on Google or Reuters — these represent the midpoint between the buy and sell price in the forex market. Keep in mind that actual rates you get from banks or money changers will usually be slightly worse because they add a margin (typically 1-3% for major currencies). The rates refresh automatically throughout the day.

Exchange rates are driven by supply and demand in the forex market, which is influenced by several factors. Interest rate differentials between countries are the biggest driver — if the US raises rates and India doesn't, the dollar tends to strengthen against the rupee because investors move money to higher-yielding assets. Trade balances matter too: India imports more than it exports, creating persistent dollar demand that pressures the rupee. Inflation differences, foreign investment flows, RBI intervention, and geopolitical events all play a role as well. The USD/INR rate specifically is also heavily influenced by oil prices since India is a major crude importer.

There is no universally "best" time, but a few practical tips help. If you are converting for travel, watch the rates for a few weeks and convert when the rate is favourable rather than waiting until the last day. For recurring conversions (like receiving foreign salary), consider converting in smaller batches to average out rate fluctuations — the same way SIP works for investments. During Indian market hours (9 AM - 5 PM IST on weekdays), the INR tends to have tighter spreads and more liquidity. Avoid converting on weekends or holidays if possible, as dealers widen their margins to account for the risk of rate gaps.