Interactive tool

Monitor Arm Fit Checker

Check monitor size, weight, VESA pattern, count, mount type, and desk thickness against common arm classes with clear fit results.

Enter your monitor details and press Check fit. Results update the URL so you can share or bookmark them.

Monitor arm classes & VESA reference

Capacity, clamp range, VESA support, and panel ceilings for five common monitor-arm tiers, derived from published Ergotron LX, LX Dual and HX, Jarvis, and HUANUO HNSS6 spec sheets (2026).

Weight ratings are per arm. 'clamp_max_mm' is the published maximum desk thickness the bundled C-clamp accepts; thicker desks need the grommet-mount option. VESA values are the patterns the bundled plate drills to.

Single, light-duty

Jarvis Single Monitor Arm, HUANUO HNSS6

Panel size: Up to 32 in
Weight range: 5-19.8 lb
Clamp range: 10-50 mm
VESA support: 75x75, 100x100 mm
Monitor count: single
Panel support: Ultrawide: No; curved: Yes

Lighter arms for 24-27" mainstream panels; the 19.8 lb ceiling is HUANUO's published HNSS6 maximum. Premium light-load arms top out lower still: Herman Miller rates the standard Flo at 4.4-15.4 lb and Humanscale rates the M2.1 at 5-15.5 lb flat, so check the exact model.

Single, standard-duty

Ergotron LX

Panel size: Up to 34 in
Weight range: 7-25 lb
Clamp range: 10-60 mm
VESA support: 75x75, 100x100 mm
Monitor count: single
Panel support: Ultrawide: Yes; curved: Yes

The benchmark single-arm tier, sized on the Ergotron LX's published 7-25 lb range. Constant Force lift holds that full range, though above 20 lb Ergotron says up to 4.5 in of low travel may be lost. Handles 34" ultrawides up to 25 lb.

Dual, standard-duty

Ergotron LX Dual, Fully Jarvis Dual

Panel size: Up to 27 in
Weight range: 7-20 lb
Clamp range: 10-60 mm
VESA support: 75x75, 100x100 mm
Monitor count: dual
Panel support: Ultrawide: No; curved: Yes

Two arms on one base, rated per-arm. Side-by-side dual works to ~27" each; two 32" panels exceed most desk-edge clamp leverage.

Heavy-duty / ultrawide

Ergotron HX (HD tilt pivot for deep 28-42 lb curved panels)

Panel size: Up to 49 in
Weight range: 20-42 lb
Clamp range: 10-60 mm
VESA support: 75x75, 100x100, 200x100, 200x200 mm
Monitor count: single
Panel support: Ultrawide: Yes; curved: Yes

Required for 38-49" super-ultrawide and heavy curved panels. Sized on the Ergotron HX's published 20-42 lb range, VESA 75x75 through 200x200 and 10-60 mm clamp; below 20 lb the arm is over-sprung and drifts up. Deep curved displays of 28-42 lb need Ergotron's separate HD tilt pivot.

Triple / multi-mount

Ergotron LX Triple, freestanding multi-arm poles

Panel size: Up to 27 in
Weight range: 6-20 lb
Clamp range: 10-60 mm
VESA support: 75x75, 100x100 mm
Monitor count: triple
Panel support: Ultrawide: No; curved: Yes

Three arms demand a pole/desk-stand base, not a single C-clamp. Per-arm rating still applies; total moment usually caps practical panels at 24-27".

Methodology & data

Rule checks compare your inputs against published manufacturer spec ranges for five common arm tiers (light-duty single arms such as the Jarvis and HUANUO HNSS6, the Ergotron LX and LX Dual, the Ergotron HX, and multi-arm poles). Each tier's minimum is checked as well as its maximum: the heavy tier uses the HX's 20 lb floor, so a lighter panel is flagged rather than passed. Weight is normalised to pounds (1 kg = 2.20462 lb).

VESA, clamp-depth and panel-size checks are hard pass/fail. A weight within 90% of a tier's maximum is flagged CAUTION because spring tension calibration drifts near the ceiling. Curved and ultrawide panels add a moment-arm caution unless the tier is rated for them.

This is a planning aid, not a substitute for the manufacturer's own load chart for your exact model.