This even-spacing calculator distributes a number of items — shelf pins, fence pickets, screws, balusters, coat hooks — evenly across a span and tells you the exact gap and the position of each one. It removes the fiddly arithmetic of dividing a run into equal parts and the rounding errors that leave the last gap looking wrong.
Centres versus gaps
There are two ways to space items, and mixing them up is the most common mistake. If you space by gaps between items, n items create n−1 gaps within the span. If you space by centres with a margin at each end, the maths changes again. The calculator lets you set the span, the number of items (or the item width), and whether you want equal gaps between objects or equal centre-to-centre spacing, then returns each position measured from one end.
Working from a single datum — measuring every position from the same end rather than from the previous item — stops small errors from accumulating across the run, which is what causes the classic 'creeping' misalignment.
Where even spacing matters
Evenly spaced details read as deliberate and well made: drawer pulls on a bank of drawers, screws along a piano hinge, slats in a bench seat, pickets in a fence, or pins for adjustable shelving. The calculator gives you a list of measurements you can mark straight onto the workpiece, so the layout is consistent whether you are placing five items or fifty.
You want 5 coat hooks evenly spaced across a 1200 mm rail with equal gaps between them and the ends.
- 5 hooks create 6 equal gaps (one at each end plus four between).
- Gap = 1200 ÷ 6 = 200 mm.
- Positions from the left end: 200, 400, 600, 800, 1000 mm.
Mark the hook centres at 200, 400, 600, 800 and 1000 mm for a balanced layout.
