A 30 km daily commute can mean different things depending on whether 30 km is the round trip or one-way distance. Once you define the distance, you can estimate fuel cost from commuting days, fuel economy and the current price per litre.
First Define the 30 km
If 30 km is the total daily round trip, 20 commuting days equal about 600 km per month. If it is 30 km each way, the round trip is 60 km and the same 20 days equal about 1,200 km.
| 30 km means… | 20 workdays/month | Distance |
|---|---|---|
| Round trip total | 20 days | 600 km/month |
| Each way | 20 days | 1,200 km/month |
| Fuel economy example | 8 L/100 km | 48 L or 96 L |
Calculate Fuel Used
Multiply monthly commuting kilometres by your vehicle’s litres per 100 km and divide by 100. A vehicle using 8 L/100 km would use about 48 litres for 600 km or 96 litres for 1,200 km.
Apply the Fuel Price
Multiply litres used by the current price per litre. Testing more than one fuel price can help you see how changing prices affect the commute.
Add Parking and Other Direct Costs
If you pay for workplace parking, tolls or transit connections, include them separately. They can materially change the cost comparison between commuting options.
Consider Time and Vehicle Wear
Fuel is easy to calculate, but a longer commute also adds kilometres to the vehicle and may increase maintenance frequency. A complete decision should consider more than the fuel bill.
A Simple Way to Check Your Numbers
Start with your normal month, then test a higher-cost scenario. This helps you see whether the plan still works when fuel, groceries, housing or another variable expense changes. Keep the assumptions visible so you can update the calculation later rather than rebuilding the budget from scratch.
Frequently Asked Questions
How many kilometres is a 30 km daily commute per month?
If 30 km is the full daily round trip and you commute 20 days, it is about 600 km.
What if 30 km is one way?
The daily round trip becomes 60 km, or about 1,200 km over 20 commuting days.
Does the calculation include parking?
No. Add parking, tolls and other direct commuting costs separately.
This information is general and may change. Check the linked official source for rules that apply to your situation.