How to Lay Out Evenly Spaced Holes With a Laser Measure and Drill

To lay out evenly spaced holes, pick one reference edge and decide what "evenly spaced" means for your row. Then calculate every hole center from that edge, transfer each mark with a ruler or tape, and check the whole layout before you drill.

A laser measure can help with one job here: reading the long span between the first and last centers, as long as your model is documented for that distance. It does not project marks onto the work. The accuracy of your hole layout depends on measuring every mark from the same edge and transferring it carefully.

Choose One Datum and Define the Hole Pattern

A datum is the single straight edge or baseline that every measurement in the row starts from. Before you measure anything, settle these details and write them down:

• Reference edge. Choose one straight, square edge or a drawn baseline. Use it for every hole in the row, and don't switch to the opposite end partway through.
• Hole count. Record the number of holes, not the number of spaces between them.
• First and last centers. Note exactly where the two end holes sit, measured from the datum to each hole's center.
• Edge margins. Check how each margin is specified. If a margin runs from the workpiece edge to a hole center, it already gives you the center location. If it runs from the workpiece edge to the hole's edge, add half the hole diameter to find the center. For example, a 1 in margin to the edge of a 1/2 in hole puts the center 1 1/4 in from the datum.
• Hole diameter. Record it, especially when the spacing is measured between hole edges.
• Spacing definition. Decide whether "even" means equal center-to-center distance (pitch) or equal clear gaps of solid material between hole edges.

These choices change the math in the next step, so settle all of them first.

Calculate Each Hole Center From the Same Datum

When both end centers are fixed, divide the distance between them by the number of holes minus one to find the pitch. The fixed-end interval formula uses this count because N holes create only N−1 gaps between them. Dividing by the total hole count instead pushes the last hole out of place.

Written out, the formula is: pitch = (last center − first center) ÷ (number of holes − 1). To place any hole, measure from the datum: hole position = first center + (hole number − 1) × pitch. Calculate each position this way rather than adding one pitch to the previous mark.

Illustrative example (assumed inputs, not a recommended spacing): five holes, with the first center 1 in from the datum and the last center 9 in from it. The span is 9 − 1 = 8 in, and there are 5 − 1 = 4 intervals, so the pitch is 8 ÷ 4 = 2 in. Your centers fall at 1, 3, 5, 7, and 9 in from the datum.

Clear-gap spacing works differently. If you want the same amount of material between neighboring holes of equal diameter, the clear-gap center pitch is the clear gap plus the hole diameter. A 1 in clear gap between 1/2 in holes gives a 1 1/2 in pitch. Once you have the pitch, place each center from the datum with the same position formula.

Verify the Span With the Meter and Transfer Marks With a Scale

A laser distance meter gives you a number on a screen rather than projecting layout lines or marking the workpiece. Use the meter only to verify the full span under its documented conditions, and transfer physical hole marks using a scale or tape. This keeps the distance check fast while letting a rigid scale handle fine local marks.

Start with your specific meter's manual. Look for three things: the minimum measuring distance, the accuracy conditions, and where the measurement starts on the tool, such as the front edge or the back. Those details vary by model, so don't assume a default. A big maximum range tells you nothing about accuracy over a few inches. Range and accuracy are separate specs.

If the manual covers the distance and setup you have, use the meter for one reading only: the full span from the first center to the last. Put the documented reference point of the tool at the first center. Keep the meter lined up with your baseline and aim toward the last center. Compare the reading with your planned span. If it matches, your endpoints are set.

Then mark each calculated center with a ruler or tape hooked or butted against the same datum. Make a fine tick at each position. Don't step through the row by taking one short laser reading per pitch.

If the full span falls outside the model's documented minimum distance or accuracy conditions, measure the span with the ruler or tape as well. Short rows often suit a tape or rule better anyway. This guide on laser meter versus tape measure explains when a distance meter helps on longer, clear spans.

Check the Layout, Then Drill

Do the full check while the workpiece is still unmarked by the bit. A missed mark costs nothing to fix now and a lot to fix later.

1. Count marks and intervals. You should have N marks and N−1 spaces. A wrong count means the formula was applied to the wrong number.
2. Confirm the endpoints and margins. Measure the first and last centers from the datum and compare them with your plan, including any edge-to-hole-edge margin conversion.
3. Check every mark from the datum. Measure each mark from the same reference edge and compare it with its calculated position. Don't rely only on the distance between neighboring marks. When you mark from one datum, each mark carries only its own small error. A stepped-off gap repeats and stacks that error down the row. Measuring this way limits how far errors spread, but it doesn't remove error from reading the scale or making the tick.
4. Fix and recheck. Erase any mark that doesn't match its target, re-mark it from the datum, and measure it again.
5. Drill at the verified centers. Set the bit tip right on the center of each mark before you start the hole, and keep the drill steady so the bit doesn't walk off the mark.

If you're drilling a repeated pattern on a drill press, this drill-press spacing technique shows how to index the workpiece against a fence and a clamped ruler.

FAQs

Can a laser measure check the short distance between two neighboring holes?

Only if your model's manual covers that distance under your setup. Many hole spacings are just a few inches, and a meter's headline range doesn't tell you how it performs that close. A steel rule or tape is usually the more direct tool for short pitches.

Is a laser measure the same as a laser level?

No. A laser measure reports the distance to a target. A laser level projects a reference line or plane. Setup and accuracy specs from one don't carry over to the other, so treat any line from a laser level as a separate tool function.

What if only the first hole and the pitch are fixed?

Use the same position formula: the first center plus (hole number − 1) times the pitch, measured from the datum. The last hole then lands wherever the math puts it. Check that its position still leaves your required edge margin before you mark the row.

How do I space holes of different diameters?

The clear-gap shortcut of adding one diameter to the gap only works when every hole is the same size. With mixed sizes, find each center-to-center distance as the clear gap plus half of each neighboring hole's diameter. Then convert every center to a distance from the datum before you mark.

Should I mark on tape or directly on the workpiece?

Either works as long as every mark is measured from the same datum and is fine enough to show a clear center point. If you use painter's tape, make sure it doesn't hide your reference edge or shift while you measure.