How much liquid is that, really?

Volume spans more orders of magnitude than almost anything else people quote casually. Here is where a number lands.

The volume Unit

67% of a bathtub

100 L is bigger than 5 of the 10 references on this page.

Reference figures are measurements and are rounded; the unit conversion behind them is exact.

Every reference on this page, with its size and its ratio to your number
Reference	Size	Yours ÷ theirs
teaspoon	0.00493 L	20,288×
coffee mug	0.35 L	286×
wine bottle	0.75 L	133×
bucket	10 L	10×
car fuel tank	60 L	1.67×
bathtub	150 L	0.667×
hot tub	1,500 L	1/15
tanker truck	30,000 L	1/300
backyard pool	50,000 L	1/500
Olympic swimming pool	2,500,000 L	1/25,000

An Olympic pool holds 2 500 m³ — 2.5 million litres, or about 16 700 bathtubs.
A cubic metre is a thousand litres and weighs a tonne if it is water. All three facts are the same fact.

Frequently asked

2.5 million, for a 50 × 25 m pool 2 m deep. World Aquatics now requires 3 m depth for major events, which makes it 3.75 million.

A cube one metre on each side — 1 000 litres. It is about seven bathtubs, or a small fridge-freezer’s external volume.