Best Long Reach Digital Calipers (2026): 5 Compared

Compared on paper

Specifications are manufacturer rated, as published on each listing and collected 2 November 2026. Where a listing contradicts itself, both figures are shown.

How the points were given

The Shop Score weighs performance (range, jaw depth, resolution and accuracy), build, value, safety and warranty. For a caliper, safety means a stated safety-relevant feature such as an IP rating or insulating jaws; the Spriour states IP54 and the SCITOOLS states insulating plastic feet. Only HARDELL states a warranty term, 1 year from the date of purchase. How We Pick explains the weights.

Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.

What the listings tell you

We read five caliper listings. Two state a 6 in jaw depth, one states 3.5 in, and two state no jaw depth. Three state 0.0005 in resolution, one states 0.01 in, and one states an IP54 rating. Only one states a warranty term, and two state a hard shell case.

How to choose the best long reach digital calipers

Jaw depth

Jaw depth is the number that makes a caliper long reach. Both Mxmoonfree calipers state 6 in, 150 mm jaws, the Spriour states 3.5 in, 90 mm jaws, and the HARDELL and SCITOOLS state no jaw depth. Long jaws reach into large workpieces for inside and outside dimensions, so check the stated depth before you buy if reach is the reason you are shopping. A shorter jaw still measures the same way, it just reaches less far into the part.

Range and resolution

Range decides the largest part you can measure. The Mxmoonfree LS-20 covers 0-20 in, the Mxmoonfree LS-9, HARDELL and Spriour cover 0-12 in, and the SCITOOLS covers 0-8 in. Resolution is finer on the metal calipers at 0.0005 in, 0.01 mm, while the plastic SCITOOLS reads 0.01 in, 0.1 mm. Pick the range for the largest job on your bench, then check the resolution against the tolerance you work to. For the finer end of the same job, see our best digital micrometer with case.

Accuracy

Accuracy is stated as a plus or minus figure, and it varies more than resolution here. The Mxmoonfree calipers and the Spriour state ±0.001 in, ±0.03 mm, the HARDELL states ±0.0015 in, ±0.04 mm, and the SCITOOLS states ±0.01 in, ±0.2 mm. Treat each figure as the maker’s claim and compare like with like: a caliper with a finer stated accuracy suits closer work, while a coarser one suits rough layout and woodworking. See micrometer vs caliper for when a micrometer replaces a caliper entirely.

Battery and auto-off

All five calipers shut down automatically after 5 minutes without operation, which saves the battery between jobs. Only HARDELL states what comes with the tool: 2 batteries and a screwdriver, plus a ruler. The other four state no battery type or count, so check the listing and keep a spare battery in the case. A caliper that wakes with a dead battery costs you the first measurement of the day.

Cases and storage

Both Mxmoonfree calipers come in a hard shell snap-lock storage case that the listing says safeguards against impacts and drops. The Spriour comes in a sturdy storage case, and the HARDELL case is stated as resistant to pressure, shock and drop. The SCITOOLS listing states no case. A caliper lives or dies by its jaws, so a case that keeps it from rattling around the toolbox is worth having.

Garage Fit Check

• Check the range before the first job: the 20 in Mxmoonfree measures 20.0 by 6.0 by 0.1 in, while the 12 in models measure 12.0 by 6.0 by 0.1 in.
• Check the battery: only HARDELL states 2 batteries included, while the other four state no battery type or count.
• Store the caliper in its case: both Mxmoonfree calipers come in a hard shell snap-lock case, and the Spriour comes in a sturdy storage case.
• Confirm the jaw depth: the Mxmoonfree calipers state 6 in jaws, the Spriour states 3.5 in, and the HARDELL and SCITOOLS state no jaw depth.
• Check the part number on the Mxmoonfree listings: both share part number LS-20-6, so confirm the range before ordering.

FAQ: garage tools

What is a digital caliper?

A digital caliper is a measuring tool with jaws and an LCD that reads inside, outside, depth and step dimensions. The calipers here cover ranges from 0-8 in to 0-20 in, with resolutions from 0.01 in to 0.0005 in.

How do you use a digital caliper?

Set zero with the zero button, then open the jaws around the workpiece for an outside dimension or inside it for an inside dimension, and read the LCD. The HARDELL lists a zero button, the SCITOOLS sets zero at any point on the scale, and the Mxmoonfree calipers offer a preset function.

What is the longest range here?

The Mxmoonfree LS-20 covers 0-20 in, 0-500 mm, the longest range in this group. The Mxmoonfree LS-9, HARDELL and Spriour cover 0-12 in, and the SCITOOLS covers 0-8 in.

How do you reset a digital caliper to zero?

Use the zero button, as the HARDELL listing states, or set zero at any point on the scale, as the SCITOOLS listing states. The Mxmoonfree calipers also list a preset function for absolute and incremental measurement.

Do any of these state a warranty?

Only HARDELL states one: a warranty within one year from the date of purchase. The SCITOOLS listing states return service within one year, which is not a warranty term, and the other three state no warranty term.

Related: the best digital micrometer with case, the dial caliper vs digital caliper comparison, our engine and shop equipment hub and our garage safety notes. Also see our best dial indicator for engine work.