Calculate bow size for a recurve or longbow from your height, arm span or draw length, and get a recommended AMO bow length and estimated draw length.
Traditional Bow Length Lookup
This retained lookup maps measured draw length to a common 64-, 66-, 68-, or 70-inch recurve or longbow shopping starting point.
How the Calculation Works
The calculator applies the displayed formula or named lookup to the visible required inputs and reports one defined result.
How to Use This Calculator
- Choose whether to size from your height, arm span or measured draw length.
- Enter that measurement in inches or centimeters.
- Select Calculate and review the result, supporting values, warning, and steps.
- Use Reset before starting a different bow, arrow, or round.
Worked Example
A 27-inch draw length falls above 26 and at or below 28 inches, so the lookup returns a 66-inch AMO starting length.
Input and Result Guide
| Item | How to use it |
|---|---|
| Draw length | Use a fitted or measured archery draw length, not sleeve length. |
| AMO bow length | Use the marked traditional-bow length, not compound axle-to-axle length. |
| Cutoff values | A value exactly on 26, 28, or 30 inches stays in the shorter listed band. |
| Result | Use the output to narrow choices, then check the exact riser and limb system. |
Interpreting the Result
A longer traditional bow can offer a smoother draw for a longer-draw archer, while discipline, limb design, transport needs, and preference can change the final choice.
Assumptions and Limitations
This is a common shopping guide, not an AMO performance standard. It does not size compound axle-to-axle length, youth equipment, or a model whose manufacturer publishes different guidance.
Common Questions
What if I don't know my draw length?
Choose height or arm span. The calculator estimates draw length as arm span ÷ 2.5, treating height as roughly equal to arm span.
Will my last successful calculation be restored?
Yes. The calculator saves enabled source values and the successful result in this browser. Reset clears that saved state.
Sources
Calculator Academy retained bow-size reference bands; Archery Trade Association terminology; bow manufacturer sizing charts.
