Big Numbers

Type any number and see how mind-bendingly big it really is — its name, its shorthand, what it compares to, and how far it would stretch.

Type a big number

✉️

1,500,000,000

10 digits — that's 1.5 billion, in the billions.

In plain words

1.5 billion

Scientific shorthand

1.5 × 10⁹

10 digits long

Count to it at 1 / sec

47 years

Vs everyone on Earth

5× fewer

~8.1 billion people

Vs grains of sand on Earth

5 billion× fewer

~7.5 quintillion grains

Vs stars in the universe

6.67 trillion× fewer

~10 sextillion stars

Stacked as pennies

2,280 km high

reaching for the sky

Those pennies weigh

3,750 tonnes

at 2.5 g each

Walked as steps

1,143,000 km

28× around the Earth

How much bigger, really?

A billion isn't a bit more than a million — it's a thousand times more. No picture can hold that gap: draw a sextillion on this screen and a thousand would be a two-thousandth of one pixel. So climb it instead. Start from one grain of sand, lay a grain down for every unit, and every rung below is a thousand times the one above it.

From

A trillion is

1,000×

bigger than a billion — that's a single ×1,000 jump.

Onebase unit
1 mm long — a single grain of sand
1 second to count
×1,000 3 times · skipping thousand, million
Billionfrom
1,000 km long — New York to Chicago
32 years to count
Trillionto
1 million km long — two and a half trips to the Moon
31,700 years to count

Counting one number every second, you'd finish a billion in 32 years. You'd still be counting a trillion after 31,700 years.

Mind-benders

Real-world quantities, in plain big-number names.

A million seconds

≈ 11.6 days

A billion seconds

≈ 31.7 years

basically a whole career

A trillion seconds

≈ 31,700 years

older than farming, writing, cities

A quadrillion seconds

≈ 31.7 million years

back to the first primates

A million hours

≈ 114 years

longer than anyone has lived

A billion dollars

2,740 years to spend

at $1,000 every single day

Seconds since the Big Bang

≈ 430 quadrillion

the universe is ~13.8 billion years old

Cells in your body

≈ 37 trillion

each one a living machine

Grains of sand on Earth

≈ 7.5 quintillion

and still fewer than the stars

Stars in the universe

≈ 10 sextillion

more than sand on every beach

Atoms in your body

≈ 7 octillion

more than stars in the universe

Ways to shuffle a deck

≈ 80 unvigintillion

8 × 10⁶⁷ — your shuffle is likely a world first

Drops in all the oceans

≈ 26 septillion

2.6 × 10²⁵ — each drop holds ~10²¹ atoms

Atoms in the whole universe

≈ 10⁸⁰

about 100 quinvigintillion — the biggest real-world count

A googol

a 1 with 100 zeros

more than every atom in the universe

Every named number

Click any number to see it written out in full. The short-scale "-illions" each add three more zeros than the last — and the pattern never stops.

The "-illions" — thousand to centillion

…and it keeps going forever. After a centillion (10³⁰³) comes a millinillion (10³⁰⁰³), and there's a fresh name for every three zeros with no end — so there is no biggest named number.