Arrow Weight Calculator
Calculator
Use this arrow weight calculator to estimate total arrow weight from shaft GPI and finished components. It gives a starting estimate, but a real scale is still the best way to weigh the finished arrow before you cut or tune a batch.
Estimate total arrow weight
Formula: shaft weight + point + insert/outsert + nock + fletching + wrap/extras.
Shaft weight is usually GPI × arrow length. Enter the component weights you know, and leave optional fields blank if you do not use them.
- Use finished component weights, not catalog guesses, when you can.
- Blank optional fields count as zero.
- Draw weight is optional and only needed if you want the grains-per-pound estimate.
- Real scale measurements are more accurate than estimates from component specs alone.
Formula used
Total arrow weight = (shaft GPI × arrow length) + point + insert/outsert + nock + fletching + wrap/extras
Grains per pound = total arrow weight ÷ bow draw weight when draw weight is entered.
Example calculation
This example shows how the pieces add up for a finished arrow.
| Component | Weight |
|---|---|
| Shaft | 8.5 GPI × 29 in = 246.5 grains |
| Point | 100 grains |
| Insert | 50 grains |
| Nock | 10 grains |
| Fletching | 18 grains |
| Wrap | 5 grains |
| Total | 429.5 grains |
| Grains per pound at 60 lb | 7.2 gpp |
This is only an estimate until you weigh the finished arrow.
What arrow weight affects
- Arrow speed.
- Trajectory.
- Noise and vibration.
- Tuning.
- Broadhead flight.
- Target impact.
Those effects depend on the full setup, so do not treat one number as a universal fix.
Grains per pound note
Grains per pound compares finished arrow weight with bow draw weight. It helps you compare the arrow against the bow, but it does not replace the bow manufacturer’s minimum arrow-weight guidance. If the result looks too light, stop and compare it with the bow manual or a bow shop before shooting.
Common mistakes
- Forgetting insert or outsert weight.
- Using draw length instead of arrow length.
- Ignoring wrap or fletching weight.
- Assuming catalog numbers match finished arrows exactly.
- Not weighing the finished arrow.
- Chasing speed with arrows that are too light.
Related guides
Use these pages to keep the arrow setup path together.
Frequently asked questions
Short answers for common arrow-weight questions.
How do you calculate arrow weight?
Add the shaft weight, point or broadhead, insert or outsert, nock, fletching, wrap, and any extras. Shaft weight is usually GPI × arrow length.
What does GPI mean on arrows?
GPI means grains per inch. It is the shaft weight for one inch of that arrow model.
Is arrow weight the same as arrow spine?
No. Arrow weight is mass. Arrow spine is stiffness. They affect different parts of tuning.
What is grains per pound?
It compares finished arrow weight to bow draw weight. It helps you compare arrow mass against the bow setup.
Should I weigh finished arrows?
Yes. A real scale is more accurate than a catalog estimate because finished arrows include all the small parts.
Does point weight change total arrow weight?
Yes. A heavier point or broadhead adds to the total arrow weight and can change how the setup feels.
Can an arrow be too light?
Yes. Always check the bow manufacturer’s minimum arrow-weight guidance before shooting.
References
These references support the arrow-weight and GPI guidance used here.
- Easton Archery FAQs
- Gold Tip Calculator
- Victory Archery — Target Archery 101
- Easton Archery — What arrows are right for my setup?