The technology giant blamed a high dollar for its less-than-expected revenues over the three month period ending 31 December.
Google said it would have been $541m higher if foreign exchange rates had been more favourable.
The UK accounted for 9% of Google’s total revenues, at $1.66bn, down from 10% in the fourth quarter of 2013. Its US homeland drove $10.2bn in sales, accounting for 56% of total revenues.
Google’s aggregate paid clicks, which includes clicks related to ads served on Google sites, increased approximately 11% during the quarter; while sites paid clicks, including clicks on ads carried on YouTube, were up 18%. The average cost-per-click to a was down 3% over the quarter.
Jon Myers, vice-president and managing director of ad tech platform Marin Software EMEA, said: "Following Facebook’s great results on mobile earlier this week, it was important that Google also posted impressive mobile stats.
"This is especially significant in the UK where clicks on mobile trump that of their European counterparts. Since Facebook upped its game on mobile, Google’s mobile ad share has fallen from over 50% in 2012 to 40%.
"But as the mobile market continues to expand, we expect Google will continue to go from strength to strength on mobile next quarter."