Free CDL Tools

CDL Tools & Calculators

Free study guides and practical resources for commercial drivers. Learn endorsements and road signs, follow visual safety guides, check axle-weight balance, calculate earnings, and explore CDL career options.

CPM Earnings Estimator
Cents per mile is the most common pay structure for over-the-road drivers. Enter your CPM rate and weekly mileage to estimate your gross earnings. Actual earnings vary significantly based on miles available, home time, detention, and other factors.
Example: 55 for $0.55/mile
OTR average: 2,000–2,800/week
After vacation, home time
Weekly Gross (Estimate)—
Monthly Gross (Estimate)—
Annual Gross (Estimate)—
These are gross estimates before taxes, deductions, fuel surcharges, and other variables. Actual take-home pay will differ. CPM pay depends on available miles, which varies by carrier, lane, season, and freight market conditions. This calculator is for educational purposes only.
Hourly Driver Pay Calculator
Local and some LTL drivers are paid hourly rather than by the mile. Calculate estimated weekly, monthly, and annual gross pay from your hourly rate. Overtime eligibility and rules vary — adjust the multiplier to match your situation.
Typically 40 or per contract
Enter 0 if no overtime
1.5 = time and a half
Regular Pay (Weekly)—
Overtime Pay (Weekly)—
Weekly Gross (Estimate)—
Monthly Gross (Estimate)—
Annual Gross (Estimate)—
These are gross estimates before taxes and deductions. Overtime eligibility and requirements vary by state, carrier, and contract. Not all commercial drivers qualify for overtime under the Motor Carrier Exemption from FLSA. Verify your specific situation with your employer or a qualified advisor.
Trip Earnings Estimator
Estimate gross compensation for a single trip including mileage pay, detention, stop pay, and other accessorial pay. Useful for evaluating load offers or understanding how different pay components add up.
Total detention for this trip
Per-stop pay if applicable
Layover, breakdown, fuel bonus, etc.
Mileage Pay—
Accessorial Pay (Total)—
Estimated Gross Trip Pay—
This is a gross estimate for educational purposes. Actual pay depends on carrier policies, load confirmations, and payment terms. Always verify trip pay with your dispatcher or load confirmation before accepting a load.
Axle Weight & Tandem Position Calculator
Enter the axle weights from your scale ticket. The calculator estimates how many trailer-tandem holes to move and in which direction to bring the drive and trailer axle groups within the limits you enter.
En español: ingresa los pesos de la báscula; la herramienta te indica cuántos huecos mover los tándems y en qué dirección.
From the scale ticket
Tractor tandem group
Trailer tandem group
The numbered hole where the locking pin is currently seated
Check how the holes are counted on this trailer
Typical starting estimate: 250 lb/hole
Verify tire, axle and state limits
Gross Weight—
Recommended Move—
Estimated Target Hole Position—
Estimated Drive Weight After Move—
Estimated Trailer Weight After Move—
    Safety notice: This is an estimate, not a legal weight certification. Actual pounds transferred per hole vary with trailer geometry, hole spacing, suspension and load position. Lock the tandems, visually verify all pins, release the trailer brakes carefully, and reweigh on a certified scale. Tandem position must also comply with bridge-formula, kingpin-to-axle, state and route-specific limits. Sliding tandems does not correct an overweight steer axle or excessive gross weight.
    CDL Career Explorer
    Answer a few questions about your preferences and see which commercial driving sectors might be worth researching. This is not career counseling or a job placement service — it's an educational starting point.
    CDL Class
    Class A
    Class B
    Not sure yet
    How important is sleeping at home every night?
    Very important — home daily
    Home weekly is fine
    Home every 2 weeks is acceptable
    Can do extended OTR
    Physical work preference (loading, strapping, etc.)
    Prefer minimal physical work
    Moderate physical work is fine
    Comfortable with heavy physical work
    Equipment interest (select all that apply)
    Dry Van
    Flatbed
    Tanker
    Refrigerated
    Local Delivery
    Specialized/Heavy Haul
    Pay structure preference
    Predictable income
    Maximize mileage pay
    Hourly preferred