Interactive tool
Arrow Spine Chart
Turn draw length, draw weight, point weight, and bow type into the exact carbon spine to buy — with every correction shown, a full reference grid, and a shareable link for your result.
Every result has its own address. Change an input and the URL updates, so you can send a setup to a shop or paste it into a forum thread.
How this result was calculated
- 27.5" shaft is 0.50" shorter than the 28" chart baseline: -2 lb effective.
- 125 gr up front is 25 gr heavier than the 100 gr baseline: +3 lb effective.
- Effective chart weight 61 lb falls in the 400 spine band. Confirm with a bare-shaft or paper tune before you fletch a dozen.
Draw length to arrow spine chart
Carbon spine by draw weight and finished arrow length, with a 100 grain point. Compound shooters: the grid below is the compound baseline — the calculator above applies your bow-type correction.
| Draw weight | 26" | 27" | 28" | 29" | 30" | 31" | 32" |
|---|---|---|---|---|---|---|---|
| 30 lb | 800 | 800 | 700 | 700 | 600 | 600 | 500 |
| 35 lb | 800 | 700 | 700 | 600 | 600 | 500 | 500 |
| 40 lb | 700 | 700 | 600 | 600 | 500 | 500 | 400 |
| 45 lb | 700 | 600 | 600 | 500 | 500 | 400 | 400 |
| 50 lb | 600 | 600 | 500 | 500 | 400 | 400 | 340 |
| 55 lb | 600 | 500 | 500 | 400 | 400 | 340 | 340 |
| 60 lb | 500 | 500 | 400 | 400 | 340 | 340 | 300 |
| 65 lb | 500 | 400 | 400 | 340 | 340 | 300 | 300 |
| 70 lb | 400 | 400 | 340 | 340 | 300 | 300 | 300 |
| 75 lb | 400 | 340 | 340 | 300 | 300 | 300 | 250 |
| 80 lb | 340 | 340 | 300 | 300 | 300 | 250 | 250 |
Next steps
- Arrow FOC Calculator
Once the spine is right, check front-of-center and grains per pound.
- Arrow Spine Calculator
The long-form version with tuning notes for traditional setups.
- Bare-Shaft Tuning
Confirm the chart's answer with an unfletched shaft before you build a dozen.
- Building Arrows
Cutting, squaring, inserts, and fletching the shafts you just spec'd.
- Draw Weight & Draw Length
Measure your true draw length before you trust any spine chart.
- Traditional Archery
Recurve and longbow spine runs weaker — here's why, and how to tune it.
Arrow spine questions
- How does draw length change arrow spine?
- Every inch of arrow length past the 28-inch chart baseline weakens dynamic spine by roughly 5 pounds of effective draw weight. A 60 lb bow with a 30-inch arrow reads like a 70 lb bow on the chart, so it needs a stiffer shaft.
- How much does point weight change spine?
- About 3 pounds of effective draw weight for every 25 grains away from the 100-grain baseline. Going from a 100 gr field point to a 200 gr single-bevel adds roughly 12 pounds of effective weight and often moves you a full spine group stiffer.
- Why does a recurve need a weaker arrow than a compound at the same weight?
- A compound is cut past centre and releases with a mechanical release, so the shaft barely has to bend around the riser. A recurve shot near centre needs about 5 pounds less effective spine, and a longbow shot off the shelf about 10 pounds less, because archer's paradox is much larger.
- Is a spine chart the final answer?
- No. A chart gets you to the right shaft to buy. Bare-shaft tuning or paper tuning tells you whether that shaft, with your release, rest, and point weight, actually flies straight. Always confirm before you fletch a full dozen.
- Can I share or cite this chart?
- Yes. Every result has its own URL — change the inputs and copy the address bar, or use the copy-link button. Link to https://wild10.com/tools/arrow-spine-chart.