How many stars are in the observable universe?

The answer

Astronomers estimate there are roughly 2 × 10²³ (200 sextillion) stars in the observable universe. This number comes from multiplying the estimated 2 trillion galaxies by an average of about 100 billion stars per galaxy. The actual total may be far higher, as many stars are too faint to detect and countless galaxies lie beyond the observable horizon. For perspective, there are only about 7.5 × 10¹⁸ grains of sand on Earth's beaches - meaning stars outnumber sand grains by a factor of over a thousand.