Under Cabinet Lighting Spacing Calculator & Kitchen Task Lighting Layout Guide

Estimate under cabinet lighting spacing, puck light count, LED strip length, fixture zones, and kitchen task-lighting placement for planning only, without wiring or installation instructions.

Reserved future display placement only. No live display script, no active display unit, no product destination URL, no lead capture, and no inquiry feature is enabled. Non-electrical, non-installation measurement planning only; no wiring, drivers, transformers, cabinet drilling, or mounting instructions.

What this under cabinet lighting calculator is for

This tool is a measurement planner for homeowners, renters, designers, handypeople, and small kitchen remodel teams who need a realistic first pass before comparing under cabinet light kits. It helps translate a cabinet run into puck-light spacing, LED strip allowance, visual end margins, and task-zone notes. The goal is not to tell anyone how to wire a kitchen. The useful output is a conservative shopping and discussion checklist: how long the run is, how many fixture points may be too sparse or too crowded, where shadows may appear, and which questions should be verified with product documentation or a qualified installer.

Use it when planning prep-counter lighting, a sink run, an apartment galley kitchen, a butler pantry, a coffee station, a range-side counter, or an L-shaped corner. It is especially helpful when the cabinet run is broken by a hood, open shelf, appliance garage, corner, window, or cabinet stile and a simple one-light-every-two-feet rule would be misleading.

Inputs and outputs to collect before comparing products

The output explains spacing in plain language, flags common over-wide or over-dense layouts, estimates rough strip length, and reminds you to verify beam spread, lumen output, driver compatibility, dimming, heat clearance, cabinet material, and code boundaries before ordering.

Calculation logic and interpretation

For puck or point fixtures, the basic spacing estimate is cabinet run length divided by one fewer than the number of fixture points. A 96 inch straight run with four points produces about 32 inches between centers, which may be acceptable for accent lighting but can leave darker work zones for task lighting unless the fixtures have wide beam spread or strong diffusers. A 72 inch run with four points produces about 24 inches between centers, often a more typical research starting point. The calculator also estimates an end margin so the first and last fixtures are not visually jammed against cabinet sides.

For LED strip planning, the rough order length equals measured run length plus allowances for section breaks and reserve. This is only a buying-prep estimate. Real strip length depends on product cut intervals, connector style, diffuser channel length, corner method, voltage drop limits, driver capacity, and whether sections are continuous or separately powered. Treat the result as a measurement note to bring to product documentation or an installer, not a wiring design.

Real planning examples

  1. Small apartment galley: a renter measures a 54 inch prep run under one cabinet and chooses three low-profile fixtures for research. The calculator shows roughly 27 inch spacing, then the renter checks whether adhesive mounting, outlet access, lease rules, and product instructions allow the kit without drilling or hardwiring.
  2. L-shaped kitchen corner: a homeowner has a 72 inch left run and a 48 inch right run around an inside corner. Instead of treating it as one straight 120 inch line, each leg is measured separately so the corner does not become either overly bright or visibly dark. Connector and diffuser rules are left for the manufacturer or installer.
  3. Glossy backsplash coffee bar: a 36 inch cabinet above a coffee station may need soft continuous diffusion rather than two intense points. The calculator notes glare and reflection checks so the buyer compares diffuser quality, dimming, color temperature, and fixture visibility before ordering.

FAQ

How far apart should puck lights be? A common planning range is roughly 18 to 30 inches apart, but product beam spread, lumen output, counter material, and task zones matter more than a universal rule.

How much LED strip do I need? Measure each usable cabinet run separately, subtract appliance breaks, then add conservative allowance for corners and section transitions before checking product cut intervals and driver limits.

Can this calculator tell me how to wire lighting? No. It is intentionally limited to measurement and buying-prep layout planning and does not provide wiring, driver, transformer, outlet, code, drilling, or installation instructions.

Should lights be mounted near the front or back? Front placement often improves task light but may show fixture glare; rear placement can emphasize backsplash and create hand shadows. Compare visually and verify product instructions.

What spacing is too wide? When puck centers move beyond roughly 30 inches, review for darker zones unless the product has wide beam spread, strong output, or continuous diffusion.

What spacing is too dense? When fixture points are closer than roughly 16 inches, the layout may look busy or create glare. Fewer fixtures, lower output, or a continuous diffused strip may be better.

Limits and safety disclaimer

This website provides general measurement planning only. It does not provide electrical, wiring, low-voltage, driver, transformer, outlet, load, code, permit, cabinet drilling, heat clearance, damp-location, product compatibility, or installation instructions. Kitchens can involve moisture, heat, metal boxes, concealed wiring, stone backsplashes, rental restrictions, and local electrical rules. Verify every product with its current manufacturer instructions and use qualified help for electrical or permanent work.