A truck scale turns guesswork into numbers. On a grain farm hauling thousands of tonnes a year, knowing exactly what’s on every load lets you check elevator weights, keep trucks legal, track bin inventory and bill custom work with confidence. For feedlots, hay sellers and input dealers, it’s often the scale that settles the bill.
A farm truck scale is also a six-figure project once you add foundation, electrical and certification, and the right choice depends on what you haul, how much yard you have, and whether the weights will be used to buy or sell. This guide covers pit, pit-less, portable and axle scales, deck sizing, what an install costs as of 2026, and legal-for-trade rules in Canada and the U.S.
When you know what you need, use FarmPages.com to find and compare scale dealers and installers. We’re a directory, not a store: we point you to suppliers, and you get quotes and deal with them directly.
Quick answer: A farm truck scale is a pit, pit-less or portable platform that weighs whole loaded trucks, while axle scales weigh one axle group at a time. A fully installed 80–100 ft farm scale commonly costs about $100,000–$250,000 CAD as of 2026. If weights set a price, the scale must be legal for trade: Measurement Canada approval and inspection, or NTEP plus state rules.
1 Does Your Farm Need a Weighbridge?
A vehicle scale, or weighbridge, weighs a whole loaded vehicle on a platform supported by load cells, with an indicator that displays and records the weight. Whether one makes sense comes down to volume and how weights affect your money.
Grain farms
Check delivery weights, load trucks to legal limits every time, and track what goes in and out of every bin. The bigger the farm, the faster it pays.
Livestock and hay
Weigh cattle by the truckload, sell hay and silage by the tonne, and track feed coming in. Useful on feedlots and for anyone trading feed by weight.
Custom work and inputs
Bill custom hauling, harvest or silage work on real weights, and verify fertilizer, seed and gravel deliveries before you sign for them.
Rule of thumb: if you’re only checking your own loads, a lower-cost portable or axle scale may do. If anyone else will pay or be paid based on your scale’s weight, plan for a certified, legal-for-trade installation from the start.
2 Truck Scale Types: Pit, Pit-less, Portable and Axle
Four layouts cover almost every farm installation.
| Type | How it’s built | Strengths | Watch-outs |
|---|---|---|---|
| Pit-type | Deck sits flush with the ground over a concrete pit | No ramps, saves yard space, clean traffic flow | More concrete and cost; needs drainage or a sump; snow and debris collect in the pit |
| Pit-less (above ground) | Deck sits on concrete piers or a slab, with ramps at each end | Lower foundation cost; easy to clean, drain and service load cells | Needs room for approach ramps, which must resist frost heave |
| Portable / low-profile | Steel deck built for a minimal foundation that can be relocated | Faster install; suits rented sites or seasonal use | Still needs a level, solid base; each move can mean re-certification for trade |
| Axle scales and weigh pads | Pads or a short platform weigh one axle or axle group at a time | Low cost, portable, handy for checking axle loads before a haul | Less accurate for total weight; split weighing is restricted for trade |
A portable truck scale suits rented land or a site you can’t commit to yet. Deck construction matters too: steel decks are lighter and quicker to install, while concrete decks (steel modules filled with concrete on site) are heavier and handle traffic well.
Load cells come in analog, digital and hydraulic designs. On open prairie, lightning is a real risk, so ask how each system is protected. Dealers commonly carry scales and cells from brands such as:
Rice Lake Cardinal Fairbanks Mettler Toledo
Compare full systems through our directory of vehicle scale and weighbridge suppliers.
3 Deck Length, Width and Capacity
Size the deck for the longest unit you’ll weigh in one pass, with room to spare. Weighing a long unit in pieces is slower and, for trade use, often not allowed.
| What you weigh | Approx. overall length | Deck length to consider |
|---|---|---|
| Single-axle or tandem grain truck | 7–10 m (23–33 ft) | 12–18 m (40–60 ft) |
| Tractor-trailer with tandem or tridem trailer | 18–23 m (60–75 ft) | 21–24 m (70–80 ft) |
| B-train or Super B grain hauler | Up to about 25 m (82 ft) in most provinces | 24–30 m (80–100 ft) |
| Tractor with grain cart or wagons | Varies | Match your longest combination |
Most farm decks are about 3–3.4 m (10–11 ft) wide; the wider deck gives drivers more margin on icy approaches. Capacity is rated two ways: total capacity, and concentrated load capacity (CLC), the heaviest axle group a deck section can carry. Make sure the CLC suits loaded tridem groups and big grain carts carrying heavy loads on a single axle, not just gross weight.
4 Truck Scale Cost: What You’re Actually Paying For
The scale itself is often less than half the project. These are rough planning estimates as of 2026 in Canadian dollars for a 21–30 m (70–100 ft) farm installation. They vary widely by region, dealer, soil, distance from the scale company and spec, so treat them as a starting point and get detailed quotes.
| Cost component | Typical range (CAD, 2026 estimate) | What drives it |
|---|---|---|
| Deck, load cells and junction boxes | $55,000–$120,000 | Length, steel vs concrete deck, cell type |
| Pit-less foundation (piers or slab) | $20,000–$60,000 | Soil testing, engineering, frost protection |
| Extra for a pit-type foundation | Add $20,000–$60,000 | More concrete, drainage, sump pump |
| Approaches, ramps and gravel | $5,000–$25,000 | Ramp length, site prep |
| Indicator, printer and remote display | $2,500–$10,000 | More with ticket software or unattended kiosks |
| Electrical, conduit and surge protection | $3,000–$12,000 | Distance from power, scale house |
| Delivery, crane, install and calibration | $8,000–$25,000 | Distance from the scale company |
| Legal-for-trade inspection | Varies | Fees and test-weight costs set by the regulator or service provider |
Add it up and a new, fully installed 80–100 ft farm scale commonly lands somewhere around $100,000–$250,000. Portable low-profile scales can trim foundation and install costs, and axle weigh pads start at a few thousand dollars. Used and refurbished scales can save a lot, but check load cell condition, approval paperwork and whether the unit can be certified at your site.
The indicator is a separate decision worth getting right. Browse scale indicator and instrumentation suppliers for the electronics that read, print and store weights.
5 Foundation, Site and Prairie Weather
Drainage
Water is the enemy of any scale. Build the site higher than the yard, slope everything away and, on a pit scale, plan a reliable sump. Water around cells freezes, heaves and corrodes.
Frost heave
Foundations must suit your soil and frost depth. A geotechnical test is cheap insurance against piers or ramps heaving out of level, which wrecks accuracy.
Straight approaches
Trucks need a straight, level run on and off the deck. Leave room for a B-train to line up without cutting across the ends.
Snow and chaff
Snow, ice and chaff packed under a deck can bind it and throw weights off. Pit-less scales are easier to clear; plan where plowed snow will go.
Watch for: lightning and power surges are a common cause of scale damage on open farmland. Insist on proper grounding and surge protection on power and signal lines, and ask whether your farm insurance covers the scale and its electronics.
6 Legal-for-Trade Rules in Canada and the U.S.
If a scale’s weight sets a price, such as selling grain, hay, feed or livestock by weight or billing custom work by the tonne, it is generally being used in trade and the rules change. A scale used only for your own information doesn’t need trade certification, but it’s smart to buy one that could be certified later.
Canada: Measurement Canada
- Devices used in trade fall under the federal Weights and Measures Act, administered by Measurement Canada
- The model must be an approved type, shown by a Notice of Approval
- Each installed scale must be inspected before trade use, by Measurement Canada or an authorized service provider
- Periodic re-inspection is required at intervals set for the trade sector
- Moving, modifying or repairing a scale can trigger re-inspection
U.S.: NTEP and State Weights and Measures
- Device types are evaluated under the National Type Evaluation Program (NTEP), run through the National Conference on Weights and Measures
- An NTEP Certificate of Conformance shows the model meets NIST Handbook 44
- State weights and measures programs, often in the state agriculture department, register, inspect and test commercial scales
- Many states require a registered service company to place a scale in service
- Inspection frequency, fees and rules vary by state
Vehicle scales are commonly built to accuracy Class IIIHD in Canada and Class IIIL in the U.S.; confirm the class with your dealer. This is general guidance only. Before you buy, contact Measurement Canada or your state weights and measures office, explain how you’ll use the scale, and confirm the requirements in writing.
Watch for: a cheap import scale without a Canadian Notice of Approval or an NTEP certificate can’t become a legal-for-trade scale in Canada or the U.S., however accurate it is. Ask for the approval or certificate number and check it covers the exact capacity and configuration you’re buying.
7 Where a Farm Scale Pays Back
Payback depends on volume. Here’s an illustration with round numbers; use your own tonnage and prices.
- Grain checks: on 8,000 tonnes of grain at an illustrative $300 a tonne ($2.4 million), a 0.5% weight discrepancy is 40 tonnes, or $12,000.
- Full, legal loads: loading every truck to its legal limit instead of leaving a margin cuts trips, fuel and driver hours. During spring road bans, axle weights become critical and overweight fines add up.
- Inventory and marketing: weighing what goes into each bin gives you real numbers for marketing, insurance records and lender reporting.
- Yield and cart scale checks: weighed loads let you calibrate yield monitors and grain cart scales, and compare field trials on real numbers.
- Inputs and custom work: verify bulk fertilizer, seed and feed deliveries, and bill custom hauling or silage work by the tonne.
If you load out of bins with augers or conveyors, a hopper scale weighs grain in batches rather than whole trucks. Compare hopper scale suppliers, and see our grain auger sizing guide for matching handling capacity. Planning a bigger yard upgrade? Our guide to grain system suppliers on the Prairies covers bins, dryers and handling.
8 Buyer Checklist Before You Get Quotes
- Measure your longest unit and choose a deck length with margin
- Confirm total capacity and concentrated load capacity for your heaviest axle groups
- Decide pit, pit-less, portable or axle scale based on site, drainage and budget
- Ask for the Notice of Approval or NTEP certificate number if weights will ever be used in trade
- Get a foundation design matched to your soil and frost depth
- Ask about lightning and surge protection, and the warranty on load cells
- Check who will calibrate, certify and service the scale, and how far away they are
- Price the indicator, printer, remote display and software as a package
Get two or three quotes on the same spec, and ask each dealer for a farm reference you can call. Install crews book up before harvest, so start early.
FarmPages doesn’t sell scales; we connect you with the people who do. Browse farm vehicle scale dealers and installers, or see the full scales directory for livestock, hopper and instrumentation suppliers.
Truck Scale FAQ
How much does a farm scale cost to install?
As a rough planning range as of 2026, a new, fully installed 80–100 ft farm vehicle scale commonly costs about $100,000–$250,000 CAD once you add the deck, load cells, foundation, approaches, electrical, indicator, installation and certification. Portable low-profile scales can reduce foundation costs, and axle weigh pads start at a few thousand dollars. Get detailed quotes for your site.
What is the difference between a pit and a pit-less scale?
A pit scale sits flush with the ground over a concrete pit, so trucks drive on without ramps and it saves yard space. A pit-less scale sits above grade on piers or a slab with ramps at each end. Pit-less designs usually cost less to build and are easier to clean, drain and service, which is why many new farm installs use them.
Does a farm scale need to be legal for trade?
Only if its weights are used to set a price, such as selling grain, hay, feed or livestock by weight, or billing custom work by the tonne. In Canada that means a Measurement Canada approved and inspected device; in the U.S., an NTEP-certified model placed in service under state weights and measures rules. Confirm your exact use with the regulator.
What size scale deck do I need for a B-train?
Most farms weighing full B-trains or Super Bs in one pass look at decks of roughly 24–30 m (80–100 ft). Measure your longest unit from steer axle to last trailer axle, add margin for drivers lining up in winter, and check that the concentrated load capacity suits loaded tridem groups and heavy grain carts.
Are axle scales accurate enough for a farm?
Axle scales and wheel weigh pads are good for checking axle loads before a haul and catching overweight groups during spring road bans. They are generally less accurate for total vehicle weight than a full-length deck, because the truck is weighed in pieces, and split weighing is restricted for trade use. For settling sales, use a certified full-length scale.