Enter your height. Get your exact desk height, chair height, monitor position, and keyboard placement — calculated to ISO 9241 ergonomic standards in under 30 seconds.
Only your height is required. Add leg and arm measurements for precision results.
01 —Why desk height is the #1 ergonomic factor
Of all the ergonomic variables in a workstation — chair padding, monitor brightness, keyboard layout — desk height has the single largest downstream effect on your body[cite: 157]. Get it wrong and every other adjustment compensates incorrectly[cite: 158]. Get it right and the rest of your posture often corrects itself[cite: 158].
Here's why: desk height directly determines where your elbows rest, which dictates wrist angle[cite: 159]. It also sets the relative position of your monitor, which controls neck angle[cite: 159]. Neck angle, in turn, governs how much load your cervical spine carries — a head tilted just 5 cm forward adds the equivalent of 15–20 kg of load to your neck muscles every hour you sit[cite: 160].
⚠️ Standard desks are wrong for most people. The industry-standard desk height of 72–74 cm was designed for a 5'10" (178 cm) male[cite: 160]. If you're shorter or taller than this, a standard desk is ergonomically incorrect for you — and you're likely compensating without realising it[cite: 160].
The cascade effect of wrong desk height
- Shoulders permanently raised (shrug posture) [cite: 161]
- Elbows above 90° — forearm and wrist strain [cite: 161]
- Neck tilts back to see monitor [cite: 161]
- Tension headaches at base of skull [cite: 161, 162]
- Shoulders roll forward to reach keyboard [cite: 162]
- Elbows below 90° — wrists bend upward [cite: 162]
- Upper back rounds (kyphosis) [cite: 162, 163]
- Head drops forward — text neck [cite: 163]
02 —How to measure for perfect desk height
You only strictly need one measurement — your standing height[cite: 163]. Our calculator uses validated anthropometric ratios to estimate everything else[cite: 164]. But if you want precision within 1–2 mm, take these three measurements[cite: 165]:
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①Standing height (required) — stand barefoot against a wall, heels together, look straight ahead[cite: 165]. Measure from floor to the top of your head[cite: 166]. Use this number in the calculator above.
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②Popliteal height (lower leg) — sit on a hard surface with your feet flat on the floor and knees at 90°[cite: 166]. Measure from the floor to the back of your knee (the popliteal fold)[cite: 167]. This directly determines ideal chair height[cite: 168].
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③Upper arm length — stand with your arm relaxed at your side, elbow bent to 90°[cite: 168]. Measure from the tip of your shoulder (acromion) to the tip of your elbow[cite: 169]. This determines ideal desk height relative to your seated position[cite: 170].
💡 Quick estimate: If you don't have a tape measure handy, your popliteal height is roughly 24.7% of your standing height, and your upper arm length is roughly 18.6% of your standing height[cite: 170]. Our calculator uses these ratios automatically[cite: 171].
03 —Standard desk heights by body height
Use this quick-reference table if you want a starting point without running the full calculator[cite: 171]. These are derived from ISO 9241-5 guidelines for a person wearing flat footwear[cite: 172]:
| Your height | Chair height | Desk height | Monitor top | Monitor distance | Note |
|---|---|---|---|---|---|
| 5'0" / 152 cm | 37–38 cm | 58–60 cm | 100–104 cm | 52–58 cm | Short footrest likely |
| 5'2" / 157 cm | 38–40 cm | 60–62 cm | 103–107 cm | 54–60 cm | |
| 5'4" / 163 cm | 40–41 cm | 62–64 cm | 106–111 cm | 56–62 cm | |
| 5'6" / 168 cm | 41–43 cm | 64–66 cm | 109–114 cm | 58–64 cm | Near standard desk |
| 5'8" / 173 cm | 43–44 cm | 66–68 cm | 112–117 cm | 60–66 cm | |
| 5'10" / 178 cm | 44–46 cm | 68–71 cm | 115–120 cm | 62–68 cm | Standard desk fits |
| 6'0" / 183 cm | 46–47 cm | 71–73 cm | 118–124 cm | 64–70 cm | |
| 6'2" / 188 cm | 47–49 cm | 73–76 cm | 121–127 cm | 66–72 cm | Adjustable desk needed |
All values in centimetres from floor. Assumes flat footwear and no footrest[cite: 175, 176].
04 —5-step ergonomic desk setup guide
Once you have your numbers from the calculator, set your workstation in this exact order[cite: 176]. Each step feeds into the next[cite: 177].
- 1Set chair height first — adjust until feet are flat on the floor and knees are at roughly 90°[cite: 177]. Your thighs should be parallel to the floor[cite: 178]. This is your foundation[cite: 179].
- 2Adjust desk height to your elbows — once seated correctly, your elbows should rest at or very slightly above desk level when your arms hang naturally[cite: 180]. The keyboard should sit at this height[cite: 181].
- 3Set lumbar support — sit fully back in the chair so your spine makes contact with the backrest[cite: 183, 184]. The lumbar support should sit at the inward curve of your lower back, roughly at belt level[cite: 184].
- 4Position monitor at arm's length — extend one arm forward; your fingertips should just touch the screen[cite: 185, 186]. The top of the monitor should align with your eye level[cite: 186]. Tilt the monitor back 10–20°[cite: 187].
- 5Position keyboard and mouse — both should be at the same level, close to the body[cite: 188, 189]. Wrists should be straight and neutral while typing[cite: 189].
05 —7 most common desk height mistakes
06 —Frequently asked questions
Sources & references
1. ISO 9241-5:1998. Workstation layout and postural requirements[cite: 229, 230].
2. OSHA (2024). Computer Workstations eTool[cite: 231].