Old style toilets, (many of which are still in use) used up to 22 litres. New toilets are set to 13 litres, many with a 6 litre option.
5 gallons
The amount of water used to flush a toilet can vary significantly depending on the type of toilet. Older models typically use around 3.5 to 7 gallons per flush, while modern, high-efficiency toilets use about 1.28 to 1.6 gallons per flush. Dual-flush toilets offer options for a lighter flush, using as little as 0.8 gallons for liquid waste. Overall, advancements in toilet design have greatly reduced water consumption in recent years.
If you want to use less water per flush, you put a brick in the bottom of the tank. You do not want to reduce the height of the water in the tank so much as use less water per flush.
The amount of water used in flushing a toilet varies depending on the model. Standard toilets typically use about 1.6 gallons per flush, while older models may use up to 3.5 to 7 gallons per flush. Therefore, flushing a toilet 20 times would use approximately 32 gallons for a standard toilet and potentially up to 140 gallons for an older model.
The flow rate of a toilet typically ranges from 1.28 to 1.6 gallons per flush (GPF) for modern, efficient models, while older toilets may use up to 3.5 to 7 GPF. This flow rate determines how much water is released during a single flush to effectively remove waste. Low-flow toilets are designed to conserve water while still providing adequate flushing performance. The specific flow rate can vary based on the toilet's design and manufacturer.
If the toilet works each time on one flush, they use roughly half the water of a standard toilet. You would then use half as much a month on the toilet. They do not always flush completely on the first flush and the toilet is only a part of the water bill.
3 liters
In a modern toilet you use 13 litres per flush.
You use anywhere from 1 cup of water to 5 cups of water to flush the toilet. This is per time you flush the toilet.
It takes 1 bucket of water when we flush.
I believe it's 3 gallons
5 gallons
1.6 GPF.
100 Galen
If it's a normal household toilet you simply lower the water level in the tank that's over and behind the toilet by adjusting the fill valve. There are many different designs so I can't tell you how on your particular toilet. Some ae as easy as turning a plastic screw and some are a real pita. If you adjust it and raise the water level too much water may run over into the overflow tube and it will just keep running. If you lower it too much your toilet may not flush completely. Generally I adust mine as high as they will go without overflowing in order to get a stronger flush. I have never needed or wanted to turn down a flush.
There is about four to five gallons wasted if you flush a toilet but I don't believe that it makes a difference if the handle is loose or not. Unless, the toilet is leaking from the handle or somewhere else.
5 gallons