Sight Mark Calculator
Calculate bow sight tape marks and pin spacing.
Set up multi-pin or single-pin sights accurately.
Essential for precision long-range shooting.
💡 Tip: Always verify sight marks by shooting at actual distances. These are estimates to get you close.
Example sight setup
Let's calculate pin positions for a typical hunting setup:
| Setup Details | Value |
|---|---|
| Sight type | Multi-pin (5 pins) |
| Arrow speed | 280 FPS |
| Arrow weight | 450 grains |
| First pin | 20 yards |
| Pin spacing | Every 10 yards |
| Recommended Pin Setup | |
| Pin 1 (top) | 20 yards |
| Pin 2 | 30 yards |
| Pin 3 | 40 yards |
| Pin 4 | 50 yards |
| Pin 5 (bottom) | 60 yards |
This 5-pin setup covers all practical hunting distances. Most shots are taken at 20-30 yards (top two pins), with occasional 40-yard shots. The 50 and 60-yard pins are for open terrain or 3D shoots.
Understanding bow sight marks
How bow sights work
Bow sights compensate for arrow drop at different distances. As distance increases, arrows drop more, so you aim higher. Sights work by moving the aiming point (pin or crosshair) down relative to your eye, which makes you aim the bow higher while keeping the sight picture the same.
Key principle: To hit higher, move sight down. To hit lower, move sight up. This is counterintuitive at first but makes sense - moving the pin down forces you to raise the entire bow to align with the target.
Multi-pin vs. single-pin sights
| Feature | Multi-Pin | Single-Pin Adjustable |
|---|---|---|
| Speed | Very fast - no adjustment needed | Slow - must dial distance before shot |
| Best for | Hunting (quick shots at unknown distances) | Target, 3D (known distances, time to adjust) |
| Accuracy | Good (10-yard gaps require holdover/under) | Excellent (exact yardage dialed in) |
| Sight picture | Cluttered (multiple pins) | Clean (single pin) |
| Cost | $50-300 | $150-500+ |
| Setup | Sight each pin at its distance | Sight two distances, install correct tape |
How sight tapes work
Single-pin adjustable sights use sight tapes with yardage marks. Each tape number represents a different trajectory curve. The tape is installed on the sight's slider, and you move the pin to the mark matching your target distance.
Finding your tape number:
- Sight in at 20 yards (mark starting position)
- Shoot at 60 yards and adjust pin until hitting center
- Measure how far you moved the sight (in inches or clicks)
- Use manufacturer's chart or online tool to find which tape number matches that movement
- Install that tape and verify at multiple distances
Faster arrows need lower tape numbers (less movement between distances). Slower arrows need higher numbers (more movement required).
How to set up multi-pin sights
Step-by-step pin sighting process
- Start with top pin at 20 yards: This is your most important pin. Shoot multiple groups and adjust until consistently hitting center.
- Move to 30 yards: Shoot 3-5 arrows. Adjust second pin (not the sight housing - just the pin vertically) until hitting center.
- Repeat for 40, 50, 60+ yards: Sight each pin independently at its designated distance.
- Verify each pin: Go back and shoot all distances to confirm. Minor adjustments may be needed.
- Mark your pins: Use colored tape or markers to remember which pin is which distance.
Recommended pin configurations
| Setup | Pin Distances | Best For |
|---|---|---|
| 3-pin hunting | 20, 30, 40 yards | Timber/close range hunting. Most shots under 35 yards. |
| 4-pin hunting | 20, 30, 40, 50 yards | Balanced setup. Good for varied terrain. |
| 5-pin standard | 20, 30, 40, 50, 60 yards | Most versatile. Covers all hunting scenarios. |
| 5-pin close range | 10, 20, 30, 40, 50 yards | Eastern timber hunting, thick cover. |
| 7-pin competition | 20, 25, 30, 35, 40, 45, 50 yards | 3D archery, known-distance shoots. |
Using pins at in-between distances
For distances between pins, use "gap shooting" - aiming between two pins or using holdover:
- 25 yards: Aim halfway between 20 and 30-yard pins
- 35 yards: Aim halfway between 30 and 40-yard pins
- 45 yards: Aim halfway between 40 and 50-yard pins
With practice, you can accurately shoot any distance from 15-60 yards with a 5-pin sight. Most hunters can hold vital-zone accuracy within 2-3 inches at these in-between distances.
Shop quality multi-pin bow sights at Lancaster Archery or multi-pin sights on Amazon.
How to set up single-pin adjustable sights
Initial sight tape installation
- Sight in at 20 yards: Get your sight perfectly zeroed at 20 yards. This is your reference point.
- Shoot at 60 yards: Move pin down until hitting center at 60 yards. Count clicks or measure movement.
- Determine tape number: Use manufacturer's chart or online calculator with your 20-60 yard movement.
- Install correct tape: Apply the matching sight tape to your slider.
- Verify multiple distances: Shoot at 30, 40, 50 yards to confirm tape accuracy.
- Fine-tune if needed: Most tapes are 98% accurate. Minor adjustments may be needed.
Using single-pin sights effectively
Pros:
- Exact yardage accuracy - no guessing between pins
- Clean sight picture - single pin doesn't obstruct view
- Longer effective range - can dial to 80-100+ yards
- Better low-light visibility - easier to see single bright pin
Cons:
- Slow for hunting - must range target and dial before shot
- Animals can move while you're adjusting
- Requires rangefinder every time
- More expensive than multi-pin sights
When to use single-pin sights
Single-pin adjustable sights excel for:
- 3D archery: Targets are stationary, distances marked or easily ranged
- Target competitions: Known distances, time to adjust
- Western hunting: Long-range shots at stationary animals in open terrain
- Spot-and-stalk: Time to range and dial before the shot
Not ideal for: Eastern timber hunting, quick shots, moving animals, close encounters where speed matters.
Sight adjustment tips and troubleshooting
🎯 Shoot groups, not single arrows
Always shoot 3-5 arrows before adjusting sight. A single arrow can be shooter error. Adjust to the group center, not one lucky shot.
📏 Paper tune first
Sight adjustments can't fix bad arrow flight. Paper tune your bow before sighting. Verify straight tears and proper rest timing.
⚙️ Remember: chase the arrow
If arrows hit right, move sight right. If hitting low, move sight down. Moving sight toward the misses brings impacts toward center.
🔄 Re-verify after changes
Changing arrow weight, broadheads, or draw weight requires re-sighting. Even new strings can shift impact 2-3 inches.
Common sighting problems and solutions
| Problem | Likely Cause | Solution |
|---|---|---|
| Pins don't match distances | Arrow speed changed (new arrows/string) | Re-sight all pins or calculate new spacing |
| Broadheads hit different than field points | Rest timing or arrow spine issue | Paper tune, adjust rest, or verify spine. May need micro-adjustment. |
| Groups good but consistently off center | Sight needs adjustment | Move sight housing (not individual pins) toward misses |
| Vertical stringing (up/down) | Inconsistent anchor or release | Form issue, not sight issue. Practice consistent anchor. |
| Horizontal stringing (left/right) | Torquing bow or grip pressure | Relax bow hand, consistent grip pressure every shot |
When to re-sight your bow
- New arrows (different weight/spine)
- New string or cables (changes speed slightly)
- Draw weight adjustment (±5 lbs or more)
- Switching from field points to broadheads
- New bow sight installed
- Significant temperature change (cold weather hunting vs summer practice)
- Once per year minimum (strings stretch, wear occurs)
Use our arrow speed calculator and arrow weight calculator to determine if equipment changes require re-sighting.
Sight mark calculator FAQs
How do I set up a multi-pin bow sight?
Start by sighting in your top pin at 20 yards. Then sight subsequent pins at 10-yard increments (30, 40, 50, 60 yards). Shoot groups at each distance and adjust pins vertically until arrows hit point of aim. Most hunters use 3-5 pins covering 20-60 yards. Use this calculator to estimate pin spacing before you start. Shop quality multi-pin sights.
What distances should I set my bow sight pins?
Most bowhunters set pins at 20, 30, 40, 50 yards. The 20-yard pin is used most often. Some hunters add a 10-yard pin for close shots or a 60-yard pin for long-range. Target archers often use single-pin adjustable sights set to exact distances. Choose pin distances based on your typical shooting scenarios.
How far apart should my sight pins be?
Pin spacing depends on arrow speed and weight. Fast setups (300+ FPS) have pins closer together. Slow setups (250-270 FPS) need wider spacing. Typical spacing: 20-30 yards = 0.3-0.5 inches, 30-40 yards = 0.4-0.6 inches, 40-50 yards = 0.5-0.8 inches. Use this calculator with your arrow speed for exact spacing.
What is a sight tape for bow sights?
A sight tape is a numbered strip that shows yardage marks for single-pin adjustable sights. Each mark corresponds to a specific distance. Sight tapes are specific to your arrow speed and bow setup. Manufacturers provide multiple tapes numbered by trajectory curve. You determine which tape number fits your setup by sighting at two known distances (typically 20 and 60 yards).
How do I find my sight tape number?
Sight in at 20 yards, then shoot at 60 yards and measure how much you moved the sight. The distance moved determines which sight tape number matches your arrow's trajectory. Faster arrows need lower tape numbers (flatter trajectory), slower arrows need higher numbers (more arc). Most hunting setups use tape numbers between 25-45. Shop single-pin adjustable sights on Amazon.
Should I use a multi-pin or single-pin sight for hunting?
Multi-pin sights are better for most hunting situations. They're faster (no adjustment needed), simpler, and more reliable. Use multi-pin for timber hunting, quick shots, or any situation where animals might move. Single-pin adjustable sights are better for 3D archery, target shooting, or western spot-and-stalk where you have time to range and dial.
How often should I re-sight my bow?
Re-sight whenever you change arrows, strings, draw weight, or before hunting season. At minimum, verify sight marks every 2-3 months during shooting season. Temperature changes, string stretch, and equipment wear can shift impact 2-4 inches. Always verify before hunting - a missed shot due to unverified sights is inexcusable.
Why do my broadheads hit different than field points?
Broadheads have larger surface area and steer arrows more than field points. If broadheads hit more than 2 inches different at 20 yards, you have an arrow flight issue (rest timing, spine, or tuning problem). Small differences (1-2 inches) can be fixed by micro-adjusting your sight or rest. Paper tune first, then sight with broadheads. Use our arrow spine calculator to verify correct spine.