Among online retailers with at least 500,000 unique visitors in March, Office Depot Inc. recorded the highest visitor-to-sales conversion rate for the month, followed by QVC Inc. and VistaPrint Ltd., Nielsen Online says in its MegaView Online Retail report.

Office Depot, No. 3 in the Internet Retailer Top 500 Guide, had a March conversion rate of 20.9%. QVC.com had a conversion rate of 19%, and VistaPrint 18.3%.

Following are the top 10 online retailers in March conversion rates, according to Nielsen’s MegaView Online Retail report:

Office Depot, 20.9%

QVC, 19%

VistaPrint, 18.3%

Roamans, 18.1%

Lands’ End, 16.2%

eBay, 15.7%

1-800-Flowers.com, 15.5%

eBags.com, 15.3%

L.L. Bean, 14.6%

Pottery Barn Kids, 14.2%

In the Internet Retailer Top 500 Guide, QVC is No. 14; VistaPrint, No. 79; 1-800-Flowers, No. 117; eBags, No. 92; and L.L. Bean, No. 23.

Lands’ End is a unit of Sears Holdings Corp., which is No. 7 in the Guide, and Pottery Barn Kids is part of Williams-Sonoma Inc., No. 20.

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