With six weeks left until the US presidential election, Google has enlisted its Doodle to remind Americans to register to vote.

Monday's doodle turns Google's letters into voters, mailboxes and computers, and it leads you to a page with instructions on how to register based on the state you live in. Google's comprehensive guide also outlines voting requirements and lists registration deadlines. Depending on your state, you can register to vote online, by mail or in person.

The search engine giant said in a bilingual blog post that it created the Doodle to celebrate National Voter Registration Day, which falls on the fourth Tuesday of every September.

It's not alone in pushing people to register. Last week, Facebook began placing reminders at the top of its users' news feeds, while a company called HelloVote launched a chatbot tool designed to let you register via text or Facebook Messenger.

Voter turnout in the US has lagged behind the majority of developed countries, sitting at 30th place out of 35 nations, according to the Pew Research Center. Millennials, who have surged to the largest living generation in the US, had the lowest voter turnout in presidential elections from 2004 to 2012.

The presidential election is 42 days away, with Democratic nominee Hillary Clinton and Republican nominee Donald Trump. Other candidates include the Green Party's Jill Stein and the Libertarian Party's Gary Johnson.