Why did nobody ever tell me a quart was the same as a liter? I m kinda pissed...?

1 quart

= 0.9464 L (liters)

Because they knew you'd be pissed either way?

The US quart (32 US fluid ounces) is slightly less than a litre.

The imperial quart (40 imp. fl. oz) is slightly more than a litre.

A litre is... exactly a litre. 1,000 cc (cubic centimetres) (approx. 33.8 US ounces)

A litre of pure water has a mass of 1 kg.

A thousand litres of water has a mass of one tonne (1,000 kg)

Then, there is the US "dry" quart (slightly MORE than a litre).

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Roughly 130 years ago, at an international meeting held in Washington DC, the USA convinced all the other countries to change to what was then called the "decimal system". Of course, as soon as other countries grudgingly accepted to switch their local systems to this new one (now called the metric system or "International system"), the USA backed off and decided to declare that their domestic system was part of the metric system (though a law that cannot apply in other countries).

Thus, inside the USA, you are allowed to use the quart "instead of" the litre. And THAT should piss you off.

Because it isn't "the same", just roughly similar.

1 Imperial Quart = 1.13652 litres

1 Customary Liquid Quart = 0.946353 litres

Because it isn't?

1 qt ~ 0.95 l