Humanscale · Office Chairs

Humanscale World One

Designed by Niels Diffrient · Humanscale

Everyday office work in a mesh chair with simplified adjustments.

$705

  • Up to 100–400 lb
  • 12 / 5-year warranty
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Check price at Humanscale ↗

Summary

A light Niels Diffrient-designed task chair whose recline responds to your weight, sold as World LM.

Best for

  • People who want few controls; recline adjusts to body weight.
  • A wide range of users; Humanscale lists 100 to 400 lb.
  • Moving the chair around; it weighs 27 lb with arms.

Good to check first

  • Humanscale's page is titled World LM; it is the same chair at the World One address.
  • Choose a mesh or upholstered seat; seat height and depth differ slightly between them.
  • Pick adjustable, fixed or no arms when you configure.

The trade-off

Simple, self-adjusting and light, with little to fine-tune by hand.

Value check

Lists at $705 at the Humanscale store for the default task chair with adjustable arms.

Price
$705
Load capacity
100–400 lb
Warranty
12 / 5 years

What Humanscale highlights

  • Tri-panel mesh back

    The back has three mesh panels that follow the sitter's shape. Humanscale says this gives lumbar support without knobs or levers.

  • Weight-sensitive recline

    The chair reclines 17°, with 8° of backrest tilt, and responds to your body weight automatically.

  • Lightweight build

    Humanscale says the light construction makes the chair easy to assemble and move.

  • Mesh or upholstered seat

    It comes all-mesh or with an upholstered foam seat.

As described by Humanscale on its official pages; not a Chairpedia assessment.

Before you buy

Fit (official)

  • Seat height 15.6–20.7 in (mesh seat) or 16–21 in (upholstered), standard cylinder.
  • Seat depth 16.4 in (mesh) or 17.9 in (upholstered).
  • Fits users from 100 to 400 lb.

Delivery and setup

  • Weighs 27 lb with arms, 26 lb armless.
  • Warranty 12 years on parts; 5 years on fabric and cushions.

Returns (official policy)

  • Humanscale shop: prepaid return label if requested within 30 days of receipt.
  • From 30 to 90 days, returns are at Humanscale's discretion with a 15% restocking fee.

Sources: Humanscale, World LM spec sheet ↗ (checked Oct 11, 2026) · Humanscale return policy ↗ (checked Oct 11, 2026)

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Versions and options

  • Arm options

Specs

Size and fit
Sizes
Height 35.6 in - 40.75 in – Standard Cylinder / 905 mm - 1,035 mm; Chair Width 25.75 in / 654 mm
Seat height
15.6 in - 20.7 in / 397 mm - 527 mm16 in - 21 in / 425 mm - 54518.1 in - 25.6 in / 460 mm - 651 mm
Seat depth
16.4 / 416 in17.9 / 454 in
Seat width
20.2 / 513 in20.8 / 528 in
Back height
22.5 / 572 in
Load capacity
100–400 lb
Adjustments
Recline
17° Recline + 8° Backrest Tilt
Arms
Armrest Height 9.5 in Fixed / 7.2 in - 10.75 in Adjustable (241.3 mm / 183 mm - 273 mm); options Adjustable Duron Arms, Fixed Duron Arms, No Arms
Lumbar support
Tri-panel back with Form Sensing Mesh technology provides tailor-made lumbar support (no knobs or levers)
Build and warranty
Warranty
12 Years, Component and Parts; 5 Years, Fabric/Cushions
Chair weight
27 lbs Arms / 26 lbs Armless (12.2 kg / 11.8 kg)

About Humanscale

Design studio
New York City
Makes
Self-adjusting seating, sit/stand desks, monitor arms and task lighting

Humanscale's design studio in New York City works to the idea that good design achieves more with less. The company says function, simplicity, longevity and sustainability guide each design, with the aim of a net positive impact.

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Questions

How much does the Humanscale World One cost?

It costs $705 at the US Humanscale Store (page is titled World LM (the World One URL); configurator default task chair, black, adjustable Duron arms (Item Code WL11B1J10J10SSC); fixed arms/armless, meeting chair and stool differ), checked Sep 2026.

What is the Humanscale World One's weight capacity?

It is rated for 100–400 lb for the World LM user range (brand: fits 95% of the population), according to Humanscale's official specifications.

What sizes or versions of the Humanscale World One are there?

It comes in height 35.6 in - 40.75 in – Standard Cylinder / 905 mm - 1,035 mm; Chair Width 25.75 in / 654 mm.

Where can I buy the Humanscale World One?

You can buy it from Amazon, the US Humanscale Store or the Humanscale Official. Check the configuration, price and return terms before ordering.

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Specs and prices come from the brand sources listed under Specs and next to the price; User Insights link to their originals. Confirm the exact configuration, seller and price before buying. Editorial policy

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