How Long Should My Arrows Be?

I have built, cut, tuned, and hunted with enough arrows to know that the shortest arrow is not automatically the best arrow. A good hunting-arrow length has to do three things: stay safely supported by the rest, give the broadhead the clearance it needs, and leave you with a shaft that will tune correctly for your bow.

That is why I do not choose arrow length by copying someone else’s setup or chasing a few extra feet per second. I start with the draw length set on the bow, build in a practical amount of clearance, and check the actual arrow and broadhead at full draw before I cut a complete batch.

This guide shows the same process I use for my own hunting arrows. You will learn how to choose a safe starting length, turn that number into the correct bare-shaft cut, and understand how the decision affects spine, weight, FOC, and the rest of the build.

How Long Should My Arrows Be?

My normal starting guideline is your actual ATA draw length plus ½ inch. For a bow with a 28-inch draw length, I start by evaluating a 28½-inch finished arrow, measured from the throat of the nock to the cut end of the shaft. That extra half inch gives me a practical safety margin while I check the real bow at full draw. It is a starting point, not a guarantee that the arrow is safe or a rule that every setup needs the same length.

Most modern drop-away rests and Whisker Biscuit-style rests support the arrow inside the riser’s sight window, behind the riser’s front edge. That is why an arrow with the same finished length as the bow’s actual ATA draw length can still leave shaft in front of the rest. ATA draw length starts at the nock throat and ends 1¾ inches ahead of the grip-pivot plane. The exact amount of shaft left ahead of the rest depends on the bow, the rest, and its fore-and-aft position.

Next, confirm the fit on the actual bow. At full draw, I want the broadhead to sit at least ½ to 1 inch in front of the rest and have enough room to clear the rest, riser, cables, and your bow hand. If that takes more than draw length plus 1 inch, the arrow needs to be longer. Do not force a shorter arrow just to chase a little speed.

My arrow-length standard: Start with actual ATA draw length +½ inch for the first test shaft. Verify broadhead, rest, riser, cable, and bow-hand clearance at full draw, then add length whenever the bow needs it. The final arrow should be as short as practical, but never shorter than safe clearance and good tuning allow.

Use the planner below before you cut. It turns your planned arrow length into the bare-shaft tube cut used by an arrow saw and the Arrow Weight Calculator. If you enter shaft GPI, it also shows the total shaft weight and the small weight change caused by rounding the cut.

Before You Cut a Test Shaft

• Use your actual draw length, not a wingspan estimate, when you have it.
• Install a nock, then use a field point or safely check the broadhead fit on your bow.
• Confirm the arrow stays supported by the rest through the full draw cycle.
• Check fixed-blade broadhead clearance carefully. Larger heads may need more room.
• Build and tune one test arrow before cutting and assembling a full dozen.

How to Measure Arrow Length Correctly

Arrow length is measured from the throat of the installed nock—the point where the bowstring sits—to the cut end of the shaft. Bare-shaft cut length is the physical carbon or aluminum tube by itself. Do not include the insert, outsert, point, or broadhead in either measurement.

The distance from the throat of the nock to the back of the physical shaft is the nock-throat offset. About ¼ inch is a useful planning estimate, but it is not a universal nock standard. Measure your installed nock when the exact cut matters. Subtract that offset from the planned arrow length to get the bare-shaft cut used by the arrow saw and for shaft-weight math.

A shaft maker can use a different convention on a specific spine chart. When that happens, follow that manufacturer’s chart for that shaft. Just make sure you know which measurement the chart expects before you compare it with the arrow you have in your hand.

What Determines the Final Length?

Your draw length gives you the starting point

Your actual ATA draw length puts the first number on the plan. I normally start ½ inch longer so I have room to verify the rest, broadhead, riser, cables, and bow-hand clearance before cutting. An arrow equal to draw length can still be safe on many modern compounds, but draw length +½ inch is my normal starting guideline. The full-draw check tells me whether to keep that length, shorten the shaft for a long front end when clearance allows, or add more length.

Rest and broadhead clearance decide whether it needs to be longer

The rest does not choose your arrow length by itself, but it does tell you whether the planned shaft is safe. I want at least ½ to 1 inch of broadhead clearance in front of the rest at full draw. If the broadhead is too close, lengthen the shaft. An arrow can be more than 1 inch longer than draw length when that is what the bow needs.

Your complete front end matters

A half-out or outsert may stick out past the carbon, but it does not make the shaft longer. Measure arrow length from the nock throat to the cut shaft end. Use that same length in the planner and as the reference for FOC. Measure your installed nock offset separately when you need the exact bare-tube cut.

The part that sticks out still matters. It moves the point seat forward, and the weight of the half-out, collar, and point belongs in the complete arrow build. That can change the finished balance and FOC. Added front weight can also make the shaft act weaker when shot, even though the projection is not added to the shaft-length input. At full draw, check that the shaft stays on the rest and that the hunting head clears the rest, riser, cables, and your bow hand. Extra reach from a half-out is not a substitute for either check.

If a long half-out or outsert puts the completed arrow farther forward than you want, you may be able to cut the shaft shorter. Say you choose an outsert in the Planner’s recommended components that projects 1.25 inches beyond the shaft. That extra reach is easy to miss when you are looking only at the shaft-length number, but it does not become shaft length.

Before you order a full batch or cut the rest of your shafts, mock up one arrow at a safe length. Check where the shaft end and installed broadhead sit at full draw, and make sure the front end clears the rest during the shot. If you choose a shorter cut, the same shaft can act stiffer; added front-end weight can pull it the other way. Recheck the shaft maker’s spine chart and your Dynamic Spine result with the new cut length and actual front-end weight. Then test that complete arrow before finishing the batch.

Why Arrow Length Matters to the Rest of the Build

Dynamic spine

Length changes how the shaft reacts when you shoot. A shorter shaft acts dynamically stiffer. A longer shaft acts dynamically weaker. The part of a half-out that projects past the shaft is not extra shaft length, but its weight still adds to the front load and can make the arrow act weaker. I set a safe length first, then use the Dynamic Spine Calculator and the shaft manufacturer’s chart to choose a starting spine.

Finished arrow weight and speed

A longer shaft adds a little weight. A shorter shaft removes a little. Multiply the bare-shaft cut length by the GPI for the exact shaft model and spine to get shaft weight. That can change your finished arrow weight and speed, but it should not be the reason you compromise clearance. Use the planner above to compare exact and rounded cuts, enter the prepared cut in the Arrow Weight Calculator, then check what the total build does in the Arrow Performance Calculator.

FOC and trajectory

For FOC, keep the length reference at the cut end of the shaft. A half-out can move the point and some of its weight forward, which can change the finished balance point without changing that reference length. Use the FOC Calculator with your actual build instead of cutting a shaft shorter just to chase a percentage. Once the arrow is built and chronographed, use the Trajectory Calculator to see how that setup fits your sight plan and hunting distances.

My Hunting Setup as an Example

• Bow: Mathews Lift
• Draw length: 27.5 inches
• Draw weight: 65 pounds
• Planned arrow length: 28 inches from the throat of the nock to the cut end of the shaft
• Planning nock offset: about ¼ inch; the installed nock should be measured for an exact cut
• Exact bare-shaft cut: 27.75 inches with a ¼-inch nock offset
• Simple shop cut: 28 inches, producing about a 28.25-inch arrow with that same nock offset
• Front end: 100-grain half-out and a fixed-blade Magnus Black Hornet
• Finished weight: about 505 grains

My planned 28-inch arrow length is draw length +½ inch. With a ¼-inch nock-throat offset, the exact tube cut would be 27.75 inches. I often simplify that to a 28-inch shop cut. At 9.5 GPI, that extra ¼ inch adds only about 2.4 grains and produces about a 28.25-inch arrow when measured from the nock throat. That small change does not meaningfully alter a roughly 505-grain hunting arrow, but I still use the actual 28-inch tube cut when I calculate shaft weight. This example does not make 28 inches right for every 27.5-inch draw. The real bow, rest, and broadhead still decide the safe final length.

Mistakes to Avoid

• Do not cut a shaft short just to gain a few feet per second. Safe clearance and a tuned arrow matter more.
• Do not make a shaft longer only to add weight. Choose a heavier shaft or components if the build needs more weight.
• Do not use arrow length as your first tuning fix. Set a safe length, then address spine and components.
• Do not order a full batch before testing one arrow. A test shaft gives you a chance to verify fit, clearance, spine, and broadhead flight.

Frequently Asked Questions

Should my arrows be longer than my draw length?

Not necessarily. Most modern drop-away and Whisker Biscuit-style rests support the shaft inside the riser’s sight window, behind its front edge. An arrow equal to actual ATA draw length can therefore leave shaft in front of the rest, but the exact amount depends on the bow and rest position. I normally begin with draw length +½ inch as a practical safety starting point. Read how compound-bow draw length is measured, then let the actual full-draw clearance check decide the final cut.

Can my arrows be more than 1 inch longer than my draw length?

Yes. The +½ to +1-inch range is a useful starting range, not a hard maximum. If your rest position, broadhead, riser, or front-end setup needs more clearance, use the longer shaft and build the rest of the arrow around that safe length.

How much broadhead clearance should I have?

I want the broadhead at least ½ to 1 inch in front of the rest at full draw, with no chance of the blades contacting the rest, riser, cables, or other bow parts. Check large fixed-blade heads especially carefully.

Does a shorter arrow always shoot better?

No. A shorter shaft can act stiffer and weigh a little less, but it is not automatically more accurate or safer. The best arrow is the one that fits your bow, clears safely, tunes correctly, and flies well with the broadhead you plan to hunt with.

Are arrow length and bare-shaft cut length the same?

Not always. Arrow length runs from the throat of the installed nock to the cut end of the shaft. Bare-shaft cut length is the physical tube. If the nock throat sits ¼ inch behind the tube, a 28-inch planned arrow length calls for a 27.75-inch exact tube cut. Measure the installed nock instead of assuming every nock uses the same offset.

Why does GPI matter when choosing arrow length?

GPI means grains per inch. Multiply the physical tube cut by the shaft’s GPI to calculate shaft weight. For example, rounding a 27.75-inch cut up to 28 inches adds ¼ inch. On a 9.5-GPI shaft, that adds about 2.4 grains. It is a small change, but using the actual cut keeps your total arrow-weight plan accurate.

When should I cut my arrows?

Cut one test shaft only after you have your actual draw length, planned front end, and a safe clearance check. Build that one arrow, verify the measurement, tune it, and shoot it with your hunting head before you commit to the rest of the batch.