What size mini excavator do you need? 1-ton, 2-ton or 3-ton
Dig depth, weight, width and price by size class, and when a gasoline or a diesel engine makes sense: how to choose a mini excavator for your job.
In short
- 1-ton machines dig trenches and holes about 5 to 6 feet deep and fit through garden gates.
- 1.5 to 2 tons is the all-rounder for property owners: deeper digging, more stability, mostly diesel.
- 3 tons and up handles basements, septic systems and heavy rock, but needs a bigger trailer and tow vehicle.
Mini excavator size classes compared
Medians of the 322 mini excavators in our library, as the brands state them:
| Size class | Models | Operating weight | Dig depth | Width | Diesel | Median price |
|---|---|---|---|---|---|---|
| 1-ton class | 54 | 2,205 lb | 5′ 7″ | 37 in | 32% | $7,000 |
| 1.5 – 2 ton | 89 | 3,999 lb | 7′ 10″ | 39 in | 82% | $13,499 |
| 2.5 – 3.5 ton | 78 | 6,658 lb | 9′ 3″ | 62 in | 92% | $26,889 |
| 4 – 6 ton | 56 | 11,089 lb | 11′ 9″ | 77 in | 98% | $76,131 |
| 6 – 9 ton (midi) | 30 | 16,931 lb | 13′ 6″ | 87 in | 100% | $138,273 |
Which size for which job
- Trenches for water, electric and irrigation lines; planting trees; small drainage: a 1-ton machine is enough and the cheapest to buy and move.
- Footings, stump removal, ponds, regular farm and landscaping work: 1.5 to 2 tons digs deeper, lifts more and stays steadier on slopes.
- Septic systems, basements, larger ponds, demolition with a breaker: 3 tons and up. Check that you can tow it: machine and trailer together often pass 8,000 lb.
Depth matters most for utilities: frost lines in northern states run 4 feet and deeper, and a trench for a water line must reach below them. Compare the stated maximum digging depth with the depth you need, plus a margin.
Gasoline or diesel
Most 1-ton machines use a single-cylinder gasoline engine, typically a Briggs & Stratton, a Honda or a Rato of about 13 hp. They keep the price low and are easy to service. From about 1.5 tons up, brands fit three-cylinder diesel engines from makers such as Kubota and Yanmar: more torque at low engine speed, longer engine life and lower fuel use, which pays off for regular work. Diesel engines of this size are certified to EPA's nonroad diesel standards; see which engines we found in EPA's records.
Width and access
A machine that cannot reach the job is no use. Measure the narrowest gate or passage on the way: a 36-inch garden gate takes only the narrowest 1-ton machines, or machines with retractable tracks that narrow the undercarriage for travel and widen it for digging. Machines that fit a 36-inch gate →
Features worth paying for
- Hydraulic thumb: grips logs, rocks and debris; worth having for land clearing.
- Side swing boom: digs alongside walls and fences without moving the machine.
- Pilot joystick controls: smoother and easier than direct mechanical levers, especially for beginners.
- Auxiliary hydraulics: needed for augers, breakers and other powered attachments.
- Enclosed cab: for cold, rain and dust; adds weight and price.
Compare every model by size, engine and features in the mini excavator comparison.
Questions
Is a 1-ton mini excavator big enough?
For trenches for water and electric lines, planting trees, drainage and small landscaping jobs, usually yes: 1-ton machines dig about 5 to 6 feet deep and pass through garden gates. For basements, septic systems, stumps or heavy rock, choose 2 tons or more.
Should I choose a gasoline or a diesel mini excavator?
Gasoline engines keep the price down on 1-ton machines used a few days a year. Diesel engines cost more but give more torque, last longer and use less fuel, which matters for regular work and machines of 1.5 tons and up.
How deep can a mini excavator dig?
Each brand states a maximum digging depth: about 5 to 6 feet for 1-ton machines, 7 to 8 feet for 1.5 to 2 tons, and 8 to 10 feet for 3 tons and up.