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Calculate total arrow weight, FOC & kinetic energy instantly with our free Arrow Weight Calculator. Fast, accurate & perfect for all archers.
Choosing the right arrow weight can make a huge difference in your shooting accuracy, power, and consistency. Whether you’re into target archery, bowhunting, or competitive shooting, understanding your arrow setup is critical.
That’s why we developed the Arrow Weight Calculator – a simple, smart tool that helps you instantly calculate total arrow weight, shaft weight, kinetic energy, and FOC (Front of Center). This tool is perfect for both beginners and pros who want fast and accurate results without complicated math.
Arrow weight refers to the total mass of your arrow, usually measured in grains (gr). It includes the shaft, point (tip), insert, fletchings (vanes), nock, and any wrap or additional accessories.
The total arrow weight affects how your bow performs. A heavier arrow may penetrate deeper and be quieter, while a lighter arrow flies faster but may lose energy quicker.
Knowing your arrow weight helps you:
Whether you shoot a 60-pound bow or a 70-pound compound bow, the correct arrow weight matters more than you might think.
Using our Arrow Weight Calculator is super easy. Just enter the values for each part of your arrow:
Step-by-step:
1. GPI (Grains Per Inch)
This number is given by the arrow manufacturer. It's the shaft's weight per inch.
2. Shaft Length (inches or cm)
Measure from the nock throat to the end of the shaft (excluding the point).
3. Point Weight
Usually 75gr, 100gr, or 125gr depending on your setup.
4. Insert Weight
Varies depending on brand and material (typically 10–30gr).
5. Fletching (Vane) Weight
Multiply the weight of one vane by how many you use (usually 3 or 4).
6. Nock Weight
Typically between 5–12 grains.
7. Wrap Weight (optional)
Some archers use wraps for design or visibility – usually 5–15gr.
8. Velocity (fps)
If you want to calculate kinetic energy, input your arrow speed.
9. Balance Point
Enter your measured balance point (for calculating FOC).
You can switch between imperial (inches, grains) and metric (cm, grams) units easily.
Here’s how we calculate arrow weight and other values:
Shaft Weight:
GPI × Shaft Length = Shaft Weight (in grains)
Total Arrow Weight:
Shaft Weight + Point + Insert + Fletching + Nock + Wrap = Total Arrow Weight
Kinetic Energy (if velocity is known):
(Total Arrow Weight × Velocity²) ÷ 450240 = Kinetic Energy (ft-lbs)
FOC (Front of Center):
(100 × (Balance Point – (Shaft Length ÷ 2))) ÷ Shaft Length = %FOC
The rule of thumb for arrow weight is:
So if you're shooting a:
60 lb bow
→ Ideal arrow weight = 360 – 540 grains
70 lb bow
→ Ideal arrow weight = 420 – 630 grains
The "best arrow weight" depends on your goal: speed, penetration, or quietness.
Our Arrow Weight Calculator was created to make archery setup smarter and easier. No more guessing or using outdated arrow weight charts – just input your data and get fast, accurate results.
Whether you're using an Easton, Victory, or custom arrows, this calculator works for all types. It’s especially useful when you need to calculate FOC, adjust your arrow spine, or prepare for a new hunting season.
Stop doing manual math and start using our calculator now. It's free, accurate, and beginner-friendly – because every archer deserves a perfectly tuned arrow.
GPI stands for "Grains Per Inch" – the weight of the arrow shaft per inch. It's provided by arrow manufacturers.
It depends on your draw weight and purpose. For hunting, 7–9 grains per pound is a good starting point.
Anywhere between 360–540 grains is ideal depending on what you're shooting.
Between 420–630 grains is generally recommended.
Yes. Just input the correct GPI, length, and other component weights.
FOC (Front of Center) measures the balance of your arrow. A good FOC helps stabilize your shot and improve accuracy, especially at long range.