The rupee today appreciated by 18 paise to 46.10 a dollar in early trade. The Indian currency got a boost by gains in the stock market and dollar weakness against other currencies.The rupee had closed 21 paise higher at 46.29 against the dollar in Friday's trading.Forex dealers said fresh capital inflows into equities by foreign funds and losses in the US dollar versus other Asian currencies and the euro, provided support to the rupee.