How to use SizesGrid's fuel consumption calculator to find out if your car is economical

When the price of gasoline goes up, everyone starts asking: “How much does my car make per liter?” or “is this consumption normal?”. In Brazil, many people talk about km/L, but technical sheets, comparisons and international content also use L/100 km (liters per 100 km) or even mpg (miles per gallon).

The SizesGrid fuel consumption calculator was created for just this: taking the mileage you drive, the number of liters filled and showing you, in a simple way, whether the car is using a lot or a little – and even converting between km/L and L/100 km when you need to compare with data from technical sheets or foreign websites.

Step 1: measure your car's consumption in practice

Before using any calculator, you need two basic numbers: how many kilometers you have driven and how many liters you have used. Economy driving guides and car portals suggest an almost identical procedure:

1. Fill the car with fuel and reset the trip meter.
2. Use the car normally (city, highway, how you usually drive).
3. When the pointer drops again, fill up to the mouth and write down:
- how many kilometers appear on the trip meter;
- how many liters entered the pump.

Real example: You drove 450 km and put in 35 liters the second time you filled up.

Step 2: understand km/L and L/100 km

There are two main ways of talking about consumption:

- km/L – how many kilometers you travel with 1 liter. The HIGHER the number, the more economical (e.g.: 13 km/L is better than 8 km/L).
- L/100 km – how many liters you need to travel 100 km. The LOWER the number, the more economical (e.g.: 6 L/100 km is better than 10 L/100 km).

In the example of 450 km with 35 liters:
Consumption in km/L = 450 ÷ 35 ≈ 12.86 km/L.
In L/100 km, the calculation is 100 ÷ 12.86 ≈ 7.8 L/100 km.

Step 3: Use the SizesGrid fuel calculator

Instead of doing the math by hand, you can throw these numbers straight into the SizesGrid calculator. A typical flow in the tool would be:

1. Enter the Automotive category and select the fuel consumption calculator.
2. Enter the distance traveled (for example, 450 km).
3. Enter the amount of fuel consumed (for example, 35 L).
4. Choose what you want to see: result in km/L, L/100 km or both.

And it returns the rounded values ​​in a friendly way, ready to compare.

Step 4: find out if consumption is “good” or “bad”

Websites and efficiency calculators usually give a general reference:

- Something around 5–6 L/100 km (about 16–20 km/L) is considered very economical.
- Between 6–10 L/100 km (about 10–16 km/L) is usually average, acceptable for many cars.
- Above 10 L/100 km (less than 10 km/L) generally indicates high consumption for passenger cars.

In the 12.86 km/L example, you would be right in the middle of that range – neither a guzzler nor ultra-economical.

Where does this calculator help in everyday life?

With just a few clicks, you can:

- See if current consumption has worsened in relation to other supply.
- Compare two different cars on the same trip.
- Estimate the cost of a trip (fuel = distance × consumption ÷ 100).

Thus, SizesGrid becomes a practical ally to understand fuel consumption without getting lost in formulas.