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Free footrest height calculator. Get recommended height in cm, heel-to-toe tilt, and Low / Moderate / High risk from seat height, lower-leg length, desk clearance, and shoes. Start with office chair height if seat height is not set yet.
Last updated: May 24, 2026
Knees hitting the desk? Keyboard tray angle calculator
Recommended Footrest Height
7.3 cm
Suggested Heel-To-Toe Tilt
12°
Risk Level
Low
Low risk profile. Current setup is close to ergonomic support targets.
Use this as an ergonomics planning reference and validate comfort with real seated posture.
We can build and embed a custom version of Footrest Height Calculator for your brand and workflow.
Answers: how high should my footrest be in cm and does my desk clearance force a higher platform.
Estimates vertical support needed when feet do not reach the floor at proper seat height.
Adds up to 1.5 cm when under-desk space is tight and flags clearance risk points.
Suggests heel-to-toe angle and setup priority (Low / Moderate / High).
Default: seat 47 cm, lower leg 42 cm, clearance 65 cm, standard shoes → ideal 6.5 + clearance 0.8 = 7.3 cm, tilt 12°, Low (score 2).
Footrest Height
7.3 cm
Tilt Target
12°
Risk Band
Low
| Footwear | Offset | Notes |
|---|---|---|
| Flat / barefoot | +0 cm | No sole stack — may need slightly more footrest height |
| Standard office shoe | +1.5 cm | Default profile for dress or casual soles |
| Thick sole / boot | +3 cm | Running shoes, boots — reduces effective lift needed |
| Clearance | Add to height | Notes |
|---|---|---|
| < 62 cm (knee-to-desk) | +1.5 cm | Tight under-desk space — bump footrest target |
| 62–66.9 cm | +0.8 cm | Moderate clearance band (default 65 cm) |
| ≥ 67 cm | +0 cm | Generous leg room — geometry-only height |
| Height | Tilt | Notes |
|---|---|---|
| > 12 cm | 15° | Higher platforms — steeper gentle ramp |
| 7.1–12 cm | 12° | Typical office footrest range |
| 3.1–7 cm | 10° | Low profile support |
| ≤ 3 cm | 8° | Minimal lift — flat or low rocker |
| Factor | Rule | Notes |
|---|---|---|
| Footrest height | >15 cm → 3 pts; >8 cm → 2; else 1 | Taller support = more setup sensitivity |
| Seat–leg vs result mismatch | >4 cm → 2 pts; >2 cm → 1 | Flags geometry vs recommendation gap |
| Desk clearance | <60 cm → 2 pts; <64 cm → 1 | Knee/thigh constraint under desktop |
| Risk band | Total ≥6 High; ≥3 Moderate; else Low | Planning score — not medical diagnosis |
Seated geometry planner for office ergonomics — validate comfort over several workdays. Adjust chair first, then footrest.
ideal = max(0, seat − lowerLeg + shoeOffset)recommended = ideal + clearanceAdjustmenttilt = 8°–15° by recommended height bandsrisk = height pts + mismatch pts + clearance pts47−42+1.5 = 6.5 cm ideal + 0.8 cm clearance → 7.3 cm. Risk total 2. Typical office worker after chair is set for keyboard height.
+1.5 cm clearance band → 11 cm, 12°, Moderate (total 4). Raise footrest and improve knee room under desk if possible.
13.5 cm at 15° — adjustable footrest recommended; verify seat is not set too high for leg length.
22.5 cm, 15°, High (total 7). Large gap plus clearance under 60 cm — revisit chair height and desk; do not stack unstable boxes as a footrest.
4 cm, 10°, Low. Low platform or angled mat may suffice; feet nearly reach floor.
4.5 cm with generous clearance (no add-on) — total risk 1. Fine-tune tilt only.
Share with ergonomics leads, HR workplace teams, and remote workers setting up home offices.
Suggested hashtags: #Ergonomics #OfficeSetup #Footrest #WorkplaceHealth #DeskSetup