Itoki ACT2 vs Knoll Life Chair
Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.
Differences at a glance
Sources
- ITOKI Product Catalog: Act2 KJ-457JE-GNB4 ↗Checked Sep 29, 2026
- Life Ergonomic Dimensions (Knoll, MillerKnoll library PDF linked from millerknoll.com Life Chair page) ↗Checked Sep 29, 2026
- ITOKI Product Catalog: Act2 functions and features ↗Checked Sep 29, 2026
- ITOKI quality warranty ↗Checked Sep 29, 2026
- Life Work Chair Product Detail (Knoll cut sheet, 2020) ↗Checked Sep 29, 2026
- ITOKI (Japan) (price) ↗Checked Sep 25, 2026
- Knoll Office Seating Price List (April 2026) (price) ↗Checked Sep 29, 2026
Itoki ACT2Knoll Life Chair
- Price
- ¥132,240From $1,947
- Seat height
- 450–565 mm (17.7-22.2 in)16.5–21.75 in (42-55 cm); 17" – 22.25"; 17.25–22.5 in (44-57 cm); 15.5" – 19.25"
- Recline
- 20°Angle Between Seat and Back 95° - 119°; Tilt Range of Back 24°
- Arms
- Adjustable arms (4D link arms): height, depth, rotation angleArms available in fixed height, height-adjustable or high performance; high performance arms adjust 2.5" in armpad width (1.25" per side) and 3" armpad fore/aft movement; Arm Height from Floor 23.25" - 32.75" (height adjustable / high performance); 26.24" – 31.25" (fixed arm)
- Headrest
- Adjustable head support: 60 mm height, 30° front-backOptional headrest measures 9"W x 6" - 9"H
- Lumbar support
- Pelvis & lumbar support: 60 mm, 7 stepsLumbar Support (Fixed) 7.5"; optional height adjustable lumbar (Exceeds 5.5" - 9.8"), 11.5" x 5.5"
- Warranty
- Structure 3 years (mechanisms and moving parts 2 years, exterior and surface finish 1 year)Structural components: 12 Years; Upholstery, textiles, leathers, finishes: 3 Years
What users mention
From 6 Itoki ACT2 and 4 Knoll Life Chair user reviews, most mentioned first. Green is liked, orange is a caution.
Design
Itoki ACT28 mentionsKnoll Life Chair4 mentionsBack support
Itoki ACT26 mentionsKnoll Life Chair1 mentionAdjustability
Itoki ACT25 mentionsKnoll Life Chair2 mentionsSeat
Itoki ACT25 mentionsKnoll Life Chair0 mentionsBuild quality
Itoki ACT24 mentionsKnoll Life Chair1 mentionComfort
Itoki ACT24 mentionsKnoll Life Chair0 mentions
Questions
Which has a headrest?
Both: the Itoki ACT2 as standard and the Knoll Life Chair as an option.
What do owners mention most?
Design for the Itoki ACT2, and design for the Knoll Life Chair, based on review summaries.
Swap in a similar chair
Compare Itoki ACT2 with
Compare Knoll Life Chair with
More comparisons
- Itoki ACT2 vs Herman Miller Aeron The Itoki ACT2 encourages active sitting, while the Herman Miller Aeron offers iconic mesh ventilation.
- Itoki ACT2 vs Steelcase Gesture The Japanese ACT2 and American Gesture differ sharply on durability reports and value.
- Knoll Life Chair vs Herman Miller Aeron Arms: Arm Height from Floor 23.25" - 32.75" on Knoll Life Chair; Arm height 7.5–11.5 in on Herman Miller Aeron.


