Quote checker
Paste in what a shop quoted and see which line — parts or labour — is out of band against published ranges at your regional rate.
Use it when: You have a quote in hand and thirty seconds to decide.
Open quote checker →Tools and calculators
All free, all work without an account, and none of them email you. They run in the browser — nothing you type is sent anywhere.
Downtime cost calculator
What the truck costs you per hour and per day while it sits. Fixed costs keep running whether the wheels turn or not.
Use it when: Deciding between the cheap shop on Thursday and the expensive one tonight.
Open downtime cost calculator →Cost per mile
All-in operating cost per mile including the maintenance reserve most owner-operators leave out until the first big repair bill.
Use it when: Working out whether a rate is worth taking.
Open cost per mile →DPF cleaning interval
When the filter is actually due, based on duty cycle rather than mileage alone, and what running past it costs.
Use it when: The regens are getting more frequent and you are wondering how long you have.
Open dpf cleaning interval →Repair cost estimator
Pick the repair and your situation, enter your shop rate, and get a parts-and-labour band before you call anyone.
Use it when: You know what is wrong and want a number before the conversation starts.
Open repair cost estimator →Fault code lookup
Type an SPN, FMI, or OEM code and go straight to what it means, what causes it, and whether you can keep driving.
Use it when: The dash is lit and you are on the shoulder.
Open fault code lookup →Being built
Named here so you know they are coming, deliberately not linked — an empty page with a “coming soon” on it wastes your time and clutters search results.
- Regen interval and forced-regen decision helper
- Air brake pushrod stroke / out-of-adjustment checker
- Battery and charging system load estimator
- Reefer fuel burn and pull-down time estimator
- Tire cost per 32nd and replacement-timing calculator
- Annual DOT inspection readiness checklist
Want one of these sooner, or something not on the list? Tell us which.