About CoachGarage

CoachGarage is an independent resource for the people who keep coaches and buses on the road: operators, workshop staff, and owner-drivers who spend as much time on running costs and service schedules as on the driving itself. Rather than one long manual, the site is a set of small, single-purpose calculators, each aimed at a number you actually have to work out to plan maintenance and budget a fleet.

How the tools are built

Each calculator runs a plain, checkable formula in your browser — nothing is sent to a server, and refreshing the page clears what you typed. The Fuel Cost Calculator converts a distance and a fuel-economy figure into the fuel a trip needs, prices it at the pump rate you enter, and multiplies by fleet size. The Fuel Economy Calculatortakes a distance and the fuel used and returns miles per gallon, litres per 100 km, and kilometres per litre together, so a metric spec sheet and an imperial fuel log line up. The Maintenance Interval Tracker adds a service interval to the last-service odometer reading and subtracts the current one to show the distance left and how much of the interval is used. The Fleet TCO Calculator sums purchase price, fuel, and maintenance over the years a vehicle is held, subtracts resale, and breaks the result down to a cost per year and per mile. The Tyre Replacement Estimator divides the usable tread above the legal limit by an observed wear rate to estimate the distance still to run. And the Vehicle Downtime Cost Calculator combines lost revenue with the fixed costs that keep accruing while a vehicle is off the road, then annualizes it.

Where the numbers come from

The formulas are the everyday ones an operator would reach for — distance divided by economy for fuel, standard unit conversions between mpg and L/100km, odometer arithmetic for intervals, and a straight tread-over-wear-rate estimate for tyres. They use the figures you enter and common industry conventions; they do not measure your specific vehicle, read your telematics, or know your local rules. Real fuel burn, wear, and costs vary with load, terrain, driving style, and weather.

Guides, learn, and the museum

Alongside the calculators, the blog and learnsection explain the reasoning behind the numbers — fuel economy, service schedules, tyre wear, running costs, and downtime. The museum is a separate, purely-for-interest collection whose entries, images, and facts are drawn from Wikipedia and Wikimedia Commons.

What this is, and isn’t

CoachGarage is supported by advertising, which is how the tools stay free with no account required. It is not a garage, a service provider, or a vehicle dealer, and it is not affiliated with any manufacturer, operator, or regulatory body it might reference. Every result is an estimate for planning, not professional mechanical, safety, or regulatory advice — always follow the manufacturer’s service schedule and your local PSV, DOT, or equivalent rules. If a tool looks wrong or you think a calculator is missing, the contact page is the place to say so.