If it is an older model, about 2-3 gallons.
Newer, water saving models typically use less than one gallon per flush.
About 1.6 gallons per flush
Modern toilets use 1.6 gallons of water to flush and older models used 3 gallons
Old toilets 5.5 gallons, the minimum on new ones is 1.6 gallons
its a myth it doesn't
Modern toilets use 1.28 or 1.6 gallons per flush
It takes approx 2 to 5 gallons of water. Depending on the age of the toilet and the type of flush you have.
The toilet uses about 1.6 gallons per flush.
A standard 1999 toilet tank typically holds around 1.6 gallons of water. However, older models may vary in capacity, ranging from 3.5 to 5 gallons per flush.
depends on the kind of toilet and where you live. today's standard in America is 1.6 gallons. more efficient models will use 1.28 gallons. some even have a dual-flush option, 0.8 gallons for #1 and 1.6 gallons for #2.
3.4 gallons it's the new standard
It takes 5-7 gallons of water per flush.
Compared to a 30 year old toilet? An amazing amount (I just installed two such toilets, replacing 30-year-old models). These are dual flush, and in the low flush mode - perfectly adequate for 70% of flushes - they use 1.3 gallons. The old toilets used almost 4 gallons per flush. A saving of 2.7 gallons per flush, times (how many??) flushes per day, times 365: You are easily talking thousands of gallons a year.