If you're an apprentice trying to pass your operator exam, a journeyman brushing up before a new job, or a small contractor who needs to stop guessing on bids — Dirt School was built for you.
No fluff. No university lectures. Just the stuff you actually need to know to work in heavy equipment, organized so you can find it fast and use it on the job or the night before a test.
Here's everything that's available right now and how it fits together.
The Free Calculators at dirtcalculator.ca
There are 22 calculators on dirtcalculator.ca, and every single one of them is free. No account. No signup. No app to download. They work on your phone, your tablet, or your laptop — and they work offline, so you can use them on a jobsite with no cell service.
These aren't generic math tools. They were built specifically for heavy equipment operators, contractors, and construction professionals. Here's what's available:
Earthworks & Volume
Cut & fill, volume (rectangular, triangular, trapezoidal), stockpile volume, material shrink and swell, and trench volume. If you're moving dirt, one of these calculators saves you from doing it wrong.
Slope & Grade
Slope percentage to ratio conversion, grade percentage calculator, and rise/run calculations. Every grading job and every operator exam involves slope math. These handle it in one tap.
Material & Hauling
Tonnage calculator, material conversion (yards to tons for different material types), aggregate base calculator, and haul cost estimator. If you're ordering material or bidding a job, these are the ones that keep you from ordering 10 loads when you need 38.
Compaction & Soils
Compaction calculator, moisture content, and proctor density reference. When the nuke gauge shows up, you want to already know your numbers.
Equipment & Production
Cycle time calculator, production rate estimator, and fuel consumption calculator. These help you plan jobs and estimate costs based on actual machine performance, not gut feeling.
General Construction
Concrete volume, rebar spacing, and bearing capacity reference.
Bookmark dirtcalculator.ca on your phone. Use it on the job. Use it studying. Use it when someone on the crew starts guessing and you want to shut it down with actual math.
The Study Guides & Training PDFs
This is where the serious prep material lives. Every guide is available at dirtschool.gumroad.com and payhip.com/DirtSchool. They're PDF downloads — buy once, keep forever, study anywhere.
IUOE Heavy Equipment Operator Exam Prep Guide
This is the flagship product and the one most operators are looking for. If you're writing your IUOE exam — or any standardized HEO certification test — this guide covers the material you're going to see:
- Soil types and classification
- Compaction theory and testing
- Slope and grade calculations
- Equipment components and systems
- Safety standards and regulations
- Earthmoving principles
- Practice questions with answers
It's written in plain language, not textbook jargon. The practice questions are structured the same way the real exam is. If you only buy one thing, this is the one.
NCCER Heavy Equipment Operator Exam Prep Guide
Same concept as the IUOE guide but aligned with NCCER certification standards. If your apprenticeship program or employer uses NCCER, this is the one you want. Covers the core knowledge areas tested in NCCER operator assessments with practice questions and clear explanations.
Pipeline Operator Handbook
Pipeline is a different world. Different equipment, different terminology, different safety standards, and a crew culture that doesn't slow down for anyone who shows up unprepared. This handbook covers:
- Pipeline construction sequence and terminology
- Equipment specific to pipeline spreads (sidebooms, bending machines, line-up clamps)
- Bending radius calculations
- Welding and coating basics operators need to understand
- Safety requirements specific to pipeline work
- Right-of-way and environmental considerations
If you're heading to a spread for the first time — or the first time in a while — this gets you up to speed before you show up.
Mining Operations & Safety Guide
Mining sites have their own rules, their own hazards, and their own expectations. This guide covers the operational and safety knowledge that mining operators need:
- Open pit and underground mining basics
- Bench heights, slope stability, and pit design principles
- Haul road standards and maintenance
- Blasting safety and clearance procedures
- Equipment specific to mining operations
- Environmental and regulatory compliance
Whether you're working a gravel pit or a large-scale mine, the safety material alone is worth having.
Estimating Guide for Small Contractors
This one isn't for operators — it's for the guys running their own show. If you own a truck and a machine and you're bidding on small jobs, this guide walks you through:
- How to do a proper material takeoff
- Volume and tonnage calculations for common job types
- Equipment rate calculations (owning and operating costs)
- How to build a bid that actually covers your costs and makes money
- Common estimating mistakes and how to avoid them
Pair this with the free calculators on dirtcalculator.ca and you've got a complete estimating setup without buying expensive software.
Alberta Class 1 & Class 3 Road Test Guide
If you're getting your Class 1 or Class 3 license in Alberta, the pre-trip inspection alone can fail you if you don't know the call-outs. This guide covers:
- Complete pre-trip walk-around procedures and what to say at each component
- In-cab inspection checklist
- Road test expectations and common mistakes
- Air brake testing procedures
- Coupling and uncoupling (Class 1)
Show up knowing exactly what the examiner is looking for instead of blanking in front of the truck.
HEO 90-Day Log Book
Every apprentice needs to track their hours, machines, and tasks. This isn't just a blank notebook — it's a structured log book designed specifically for heavy equipment apprentices to document their 90-day (or longer) field experience in a way that's organized, professional, and ready for sign-off.
Jobsite Safety Booklet
A compact, practical safety reference covering the core safety topics every operator and worker needs to know. Hazard identification, PPE requirements, emergency procedures, trenching safety, and common jobsite hazards. Good for personal reference or for contractors who want to hand something to their crew.
How It All Fits Together
Here's the thing most people don't realize — the calculators and the guides work together.
Studying for your IUOE exam and you hit a slope calculation question you don't understand? Open the slope calculator on dirtcalculator.ca, punch in the numbers, and see how it works. The guide teaches the concept. The calculator lets you practice it and use it on the job.
Bidding a small excavation job? The estimating guide teaches you the process. The volume calculator, tonnage calculator, and haul cost estimator on dirtcalculator.ca do the math. You get a bid that's actually based on real numbers instead of a guess.
Working on a compaction job and the soils tech is running tests? The mining and safety guide explains what the tests measure. The compaction calculator on dirtcalculator.ca helps you verify the numbers and understand what you're targeting.
The guides give you the knowledge. The calculators give you the tools. Together, they make you the operator or contractor who actually knows what they're doing — not the one who's faking it and hoping nobody asks a question.
Who Dirt School Is For
- Apprentices studying for IUOE, NCCER, or any HEO certification exam
- Operators transitioning into pipeline, mining, or a new equipment class
- Small contractors who need to estimate jobs accurately and bid with confidence
- Anyone getting their Class 1 or Class 3 license in Alberta
- Crew leaders and foremen who want a safety reference that's actually practical
- Career changers breaking into heavy equipment who want to show up with a foundation of knowledge
Where to Find Everything
Free calculators (22 tools, no signup, works offline):
dirtcalculator.ca
Study guides and training PDFs:
dirtschool.gumroad.com
payhip.com/DirtSchool
Blog, articles, and updates:
dirtschool.ca
The industry doesn't hand you a manual when you show up. Dirt School does.