Wireless charging through wood: complete guide to thickness, materials, and installation
Wireless charging through wood works. Qi wireless chargers transmit power through wooden surfaces up to 30mm (1.18 in) thick, covering the vast majority of desks, tables, and countertops. The charger mounts underneath the wood, completely hidden, and charges any Qi-enabled phone placed on the surface above. No drilling, no routing, and no visible hardware.
Qi wireless charging passes through all types of wood, including oak, walnut, cherry, pine, MDF, plywood, and bamboo, at distances up to 30mm (1.18 in). For devices with MagSafe (iPhone 12 and newer), the recommended maximum surface thickness is 18mm to 20mm (0.71 in to 0.80 in) for optimal magnetic alignment. Long-distance chargers like the InvisQi wireless charger deliver up to 10W through wood, which is fast enough to fully charge most smartphones in 2 to 3 hours. Over 13,000 products are now Qi Certified worldwide, according to the Wireless Power Consortium (WPC), making Qi the universal standard for wireless charging through surfaces.
Maximum wood thickness for wireless charging
The maximum effective thickness for Qi wireless charging through wood is 30mm (1.18 in), based on the Qi specification which supports power transfer over distances up to 40mm (1.6 in) between coils. In practice, surface thickness should stay under 30mm because the phone case, air gap, and alignment tolerance consume the remaining distance budget. The optimal range for consistent charging is 18mm to 25mm (0.71 in to 0.98 in).
One important limitation: iPhone 12 and newer models use MagSafe magnetic alignment, which works best through 18mm to 20mm (0.71 in to 0.80 in) of material. Samsung announced in January 2025 that its Galaxy S25 series is "Qi2 Ready," and Google's Pixel 10 (released August 2025) was the first major Android phone with built-in Qi2 magnets. As Qi2 adoption grows, the 18mm to 20mm range will become the recommended maximum for all flagship phones.
| Surface thickness | Standard Qi devices | MagSafe/Qi2 devices |
|---|---|---|
| Under 18mm (0.71 in) | Excellent performance | Excellent performance |
| 18mm to 20mm (0.71 to 0.80 in) | Excellent performance | Good performance (recommended max) |
| 20mm to 25mm (0.80 to 0.98 in) | Good performance | Reduced alignment, slower charging |
| 25mm to 30mm (0.98 to 1.18 in) | Functional, slower charging | Not recommended |
| Over 30mm (1.18 in) | Will not charge | Will not charge |
Which wood types work with wireless charging
Every common wood type is compatible with Qi wireless charging because wood does not block electromagnetic fields at the 115kHz to 135kHz frequency range used by Qi transmitters. The Qi signal passes through solid hardwoods, softwoods, engineered wood, and composite wood products equally well. Wood density, grain pattern, and species have no measurable effect on charging performance. The only variable that matters is total thickness.
| Wood type | Typical thickness | Compatible | Notes |
|---|---|---|---|
| MDF / Particleboard | 18mm to 25mm | Yes | Most common desk material. Works well. |
| Solid oak, walnut, cherry | 19mm to 30mm | Yes | Hardwood density does not affect Qi signal. |
| Pine, cedar, fir | 18mm to 25mm | Yes | Softwoods work identically to hardwoods. |
| Plywood | 12mm to 25mm | Yes | Layered construction has no impact on charging. |
| Bamboo | 15mm to 25mm | Yes | Grass-based material, fully compatible. |
| Laminate over wood | 18mm to 25mm total | Yes | Laminate layer is thin. Total thickness is what matters. |
Wood finishes (lacquer, varnish, paint, stain) do not affect wireless charging. These coatings are typically less than 1mm thick and are invisible to the Qi signal.
How to install a wireless charger under a wooden desk
Installing a wireless charger under a wooden desk takes under 10 minutes and requires no tools beyond a measuring tape. The process involves four steps: measure the wood thickness, attach the charger underneath, verify alignment, and mark the charging spot on top. No drilling, routing, or permanent modification to the desk is needed.
- Measure your desk thickness with a ruler or caliper. Confirm it is between 15mm and 30mm (0.59 in and 1.18 in).
- Choose the charging location on the desk surface where you naturally place your phone.
- Peel the 3M adhesive backing on the charger unit and press it firmly to the underside of the desk, directly below your chosen spot.
- Place the included LED alignment sensor on top of the desk. All lights on confirms correct positioning.
- Apply the placement sticker on the desk surface to mark the charging spot for daily use.
For permanent installations or commercial environments, use the included security screws instead of adhesive. This prevents the charger from shifting if the desk is moved or bumped.
Charging speed through wood versus direct contact
Wireless charging through wood delivers 7.5W to Apple devices and 10W to Samsung devices when using a long-distance charger, compared to 15W from a direct-contact Qi2 charger. The trade-off is speed for invisibility. A direct-contact charger sits on your desk and charges faster. An under-surface charger is completely hidden but takes roughly 40% to 50% longer to reach a full charge.
Wireless charging efficiency drops as distance increases. Industry testing shows that wired chargers deliver 85% to 95% energy efficiency, while wireless chargers at close range deliver 60% to 80% (Wistek, 2025). Through a 20mm wood surface, expect efficiency in the lower half of that wireless range, around 60% to 70%. This means some energy is lost as heat, which is normal and managed by the charger's built-in thermal protection.
"Faster wireless charging is the number one consumer-requested feature to improve wireless charging satisfaction," according to WPC market research cited in the consortium's July 2025 Qi2 25W press release. The Qi2 25W standard, launched in July 2025, delivers nearly 70% more power than the original Qi2, though long-distance under-surface chargers currently operate on the Qi 1.0 extended power profile at up to 10W.
Commercial applications: wireless charging in wooden furniture
Restaurants, hotels, offices, and coworking spaces are installing hidden wireless chargers under wooden tables and desks to offer charging as an invisible amenity. The global wireless charging market reached $30.33 billion in 2025 and is projected to grow at 24.9% CAGR through 2033, according to SkyQuest Technology Consulting. A significant share of that growth comes from commercial environments integrating wireless charging into existing furniture.
The InvisQi wireless charger has been deployed in over 25 countries across hospitality, healthcare, aviation, and commercial interiors, with over 3,200 units sold since 2021. Shield Casework, a commercial furniture manufacturer, has integrated 269 InvisQi units across 17 production runs over four years, embedding wireless charging directly into custom casework products.
If you are a business, contractor, or furniture manufacturer interested in adding wireless charging to your products or spaces, volume pricing is available for orders of 10 or more units.
What blocks wireless charging through wood
Metal is the only common material that blocks Qi wireless charging through wood. Any metal between the charger and the phone will prevent the electromagnetic field from reaching the device. This includes metal drawer slides positioned directly above the charger, metal reinforcement plates in the desk frame, metal-backed phone cases, phone cases with built-in card holders, and PopSocket or kickstand accessories with metal components.
Wood itself never blocks the signal. Neither does paint, varnish, laminate, felt padding, or desk mats (unless the mat contains a metal layer). If your phone is not charging, the issue is almost always a metal object in the path, misalignment, or a surface thicker than 30mm.
Frequently asked questions
Can you wirelessly charge a phone through a wooden desk?
Yes. Qi wireless chargers transmit power through wood up to 30mm (1.18 in) thick. Most standard desks are 18mm to 25mm thick, which falls within the effective range. The charger mounts to the underside of the desk with adhesive and requires no drilling or surface modification.
What is the maximum wood thickness for wireless charging?
The maximum effective thickness for Qi wireless charging through wood is 30mm (1.18 in). For iPhones with MagSafe (iPhone 12 and newer), the recommended maximum is 18mm to 20mm (0.71 in to 0.80 in) due to magnetic alignment requirements. Standard Qi devices without MagSafe work reliably through the full 30mm range.
Does the type of wood affect wireless charging performance?
No. Qi wireless charging works through all wood types, including oak, walnut, cherry, pine, MDF, plywood, and bamboo. Wood density does not block the electromagnetic field used in Qi charging. The only factor that matters is total thickness, which must stay under 30mm (1.18 in).
Does wireless charging through wood damage the surface?
No. Under-surface wireless chargers mount to the bottom of the wood with adhesive or screws. There is no drilling, routing, or modification to the wood surface. The installation is completely non-destructive and reversible.
How fast is wireless charging through wood compared to direct contact?
Wireless charging through wood delivers 7.5W to Apple devices and 10W to Samsung devices when using a long-distance charger like InvisQi. Direct-contact wireless chargers typically deliver 15W. The trade-off is a slower charge speed in exchange for a completely hidden, cable-free setup.
