Formula to convert 29.9 liters to gallons is to multiply 29.9 by 0.264172 (this is the value for 1 liter to gallon).
Convert 29.9 Liters to Gallons results
29.9 x 0.264172052 = 7.89874436676
29.9 l = 7.9 gal
To conclude the answer for 29.9 liters is seven point nine gallons