What was the population of the British Empire at the outbreak of WWI in 1914?

Answer 1

It's always going to be an estimate.
Here's what Wiki says :
"By 1921, the British Empire held sway over a population of about 458 million people, approximately one-quarter of the world's population."
This doesn't exactly fit your question as to 1914, but after the First World War, the only substantial additions to the British empire were the ‘mandated’ territories, formerly German and Ottoman possessions according to the Versailles settlements.

Answer 2

The British Empire is a confusing one to locate because it grew to become into very diverse right this moment, The inhabitants of large Britain and eire a month till now the outbreak of the war of 1914-18 grew to become into formally envisioned at 40 six,089,249 in spite of the indisputable fact that. the respond till now mentioned that there grew to become into probably under in 1921, yet permit's no longer overlook the international Influenza outbreak in 1918 which will have affected this parent.

Answer 3

about 46 million