Distance
Use the expected route plus a little local driving rather than only the straight route between cities.
Consumption
Use your own recent L/100 km if possible.
Price changes
Gasoline and diesel prices vary by province, community and time.
Treat it as a planning range
Weather, traffic, terrain and idling can move the final total.
General travel-planning information only. Drivers must follow licence restrictions, traffic laws and current road-authority directions. Do not continue driving when fatigued or when weather, closures or road conditions make the trip unsafe.