This drive time calculator takes the figures you already have and applies the relationship behind drive time calculations for you, giving drive cost / person, total drive time and total drive cost from average speed, fuel efficiency, departure time, distance, fuel price, number of passengers and total time of breaks.
What Is the Drive Time Calculator?
The drive time calculator turns average speed, fuel efficiency, departure time, distance, fuel price, number of passengers and total time of breaks into drive cost / person, total drive time and total drive cost.
It is a quick way to get from the numbers you have to the number you need, without setting up a spreadsheet or reaching for a formula.
How the Drive Time Works
Each result follows from the ones before it, and the calculator shows every step, so a surprising answer can be traced back to the input that caused it.
Round your inputs to the precision you actually know, and keep more precision than that in the intermediate steps.
Getting a Result You Can Trust
Run the calculation twice with slightly different inputs. A sensible calculator moves its output in proportion; a wild change points to a unit or a decimal point problem in what you entered.
Write the inputs down next to the answer. It takes a moment and it is the difference between a number you can explain and one you cannot.
A Worked Example
Working through an example, with average speed set to 10, fuel efficiency set to 5, departure time set to 2, the calculator returns total drive time of 12, and arrival time of 14, and total drive cost of 0.05. Substitute your own figures and the same steps produce the same kind of answer.
Frequently Asked Questions
What do I need to work out drive cost / person?
Enter average speed, fuel efficiency, departure time, distance, fuel price, number of passengers and total time of breaks. The calculator then works through the relationship and reports drive cost / person, total drive time and total drive cost.
What does the drive time actually calculate?
It takes average speed, fuel efficiency, departure time, distance, fuel price, number of passengers and total time of breaks and converts them into drive cost / person, total drive time and total drive cost using the standard relationship for this problem. Each step is applied in turn, so every output is traceable back to the numbers you typed in.
How should I enter average speed?
Use the value you actually have, in the unit shown next to the field. Enter every value in the same unit system. The calculator assumes the figures you supply are consistent, so it cannot correct a mistake that happens before the calculation starts.
Is the answer exact?
It is as exact as the formula and the inputs allow. The method itself is the standard one for this problem, so the only sources of error are the figures you enter and the precision you ask for.
Does anything you type get stored?
No. The whole calculation runs inside your browser, and nothing you enter is uploaded, logged or sent anywhere.