Our free Ballistic Calculator helps hunters, precision shooters, long-range competitors, and firearm enthusiasts accurately predict bullet trajectory before taking a shot. Simply enter your bullet’s ballistic coefficient, muzzle velocity, bullet weight, sight height, zero distance, and environmental conditions such as temperature, altitude, wind speed, and humidity. The calculator instantly generates an accurate ballistic chart showing bullet drop, wind drift, remaining velocity, retained energy, time of flight, and both MOA and MIL adjustments. Whether you’re zeroing a new rifle, comparing two different loads, or preparing for long-range shooting, this advanced ballistic calculator provides the data needed to improve accuracy and make confident shooting decisions.
Ballistics Calculator
Compute highly accurate bullet trajectory, drop tables, wind drift, and energy outputs below.
Primary Load Setup
Secondary Load Setup
Atmospheric Conditions & Angle
Output Layout Configuration
Visual Bullet Drop Trajectory Profile
| Range (yd) | Load | Drop (in) | Drop (MOA) | Drop (MIL) | Windage (in) | Windage (MIL) | Velocity (fps) | Energy (ft-lbs) | Time (s) |
|---|
How to Use This Ballistic Calculator
Using this calculator only takes a few minutes. Follow these simple steps for the most accurate results.
Step 1 – Select Your Drag Model
Choose either G1 or G7.
| Drag Model | Best For |
|---|---|
| G1 | Flat-base bullets and traditional hunting ammunition |
| G7 | Modern boat-tail and long-range match bullets |
The drag model determines how the calculator estimates aerodynamic drag during flight.
Step 2 – Enter the Ballistic Coefficient (BC)
The ballistic coefficient measures how efficiently a bullet moves through the air.
- Higher BC = Less drag
- Higher BC = Flatter trajectory
- Higher BC = Better wind resistance
Example:
| Bullet | Typical BC |
|---|---|
| .223 55gr FMJ | 0.255 |
| .308 175gr MatchKing | 0.505 |
| 6.5 Creedmoor 140gr ELD-M | 0.610 |
Always use the BC published by the bullet manufacturer.
Step 3 – Enter Bullet Weight
Bullet weight is measured in grains (gr).
Examples include:
| Cartridge | Common Bullet Weight |
|---|---|
| .223 Remington | 55–77 gr |
| .308 Winchester | 150–175 gr |
| 6.5 Creedmoor | 120–147 gr |
| .300 Win Mag | 180–220 gr |
Bullet weight directly affects retained energy and trajectory.
Step 4 – Enter Muzzle Velocity
Muzzle velocity is the speed of the bullet as it leaves the barrel.
Typical examples:
| Cartridge | Velocity |
|---|---|
| .223 Remington | 3200 fps |
| .308 Winchester | 2650 fps |
| 6.5 Creedmoor | 2700 fps |
| .300 Win Mag | 2950 fps |
Use the actual velocity measured by a chronograph whenever possible.
Step 5 – Enter Sight Height
Sight height is the distance between the center of your rifle bore and the center of your scope.
Typical values:
| Rifle Type | Sight Height |
|---|---|
| Hunting Rifle | 1.5 in |
| Precision Rifle | 1.8 in |
| AR Platform | 2.6 in |
Step 6 – Set Your Zero Distance
Zero distance is the range where your rifle is perfectly sighted in.
Common zero distances include:
| Shooting Style | Zero |
|---|---|
| Hunting | 100 yards |
| Target Shooting | 200 yards |
| Long Range | 100–300 yards |
Step 7 – Enter Environmental Conditions
Environmental factors change how a bullet flies.
Temperature
Warmer temperatures generally increase velocity.
Altitude
Higher altitude reduces air density, allowing bullets to travel flatter.
Barometric Pressure
Pressure changes influence drag.
Humidity
Humidity has a small effect but improves overall calculation accuracy.
Wind Speed
Wind causes horizontal bullet drift.
Wind Angle
A full-value 90° crosswind produces the greatest drift.
Shooting Angle
The calculator compensates for uphill and downhill shots.
Step 8 – Configure the Output Table
Choose:
- Maximum shooting distance
- Distance interval (25, 50, or 100 yards)
- Display units:
- MOA
- MIL
- Both
Step 9 – Compare Two Loads
Click Add Secondary Load to compare two different cartridges or bullet loads.
This feature helps compare:
- Different bullet weights
- Different ballistic coefficients
- Factory vs handloads
- Hunting vs match ammunition
The trajectory graph displays both loads simultaneously for easy comparison.
Understanding the Ballistic Results
After calculation, the tool generates a detailed ballistic chart.
| Column | Meaning |
|---|---|
| Range | Distance from muzzle |
| Drop (in) | Vertical bullet drop |
| Drop (MOA) | Scope adjustment in MOA |
| Drop (MIL) | Scope adjustment in MIL |
| Windage | Horizontal wind drift |
| Windage (MIL) | Wind correction in MIL |
| Velocity | Remaining bullet speed |
| Energy | Remaining kinetic energy |
| Time | Time of flight |
These values help shooters make accurate scope adjustments at every distance.
How Does a Ballistic Calculator Work?
A ballistic calculator predicts bullet flight by combining firearm specifications, ammunition characteristics, and atmospheric conditions. It estimates how gravity, air resistance, and wind influence the projectile as it travels toward the target.
The calculation considers variables including:
- Ballistic coefficient
- Muzzle velocity
- Bullet weight
- Zero distance
- Drag model
- Wind speed
- Wind direction
- Temperature
- Air pressure
- Humidity
- Altitude
- Shooting angle
The result is a trajectory model that estimates bullet drop, wind drift, retained velocity, impact energy, and flight time at different ranges.
Factors That Affect Bullet Trajectory
| Factor | Effect |
|---|---|
| Ballistic Coefficient | Higher BC reduces drag. |
| Velocity | Faster bullets drop less. |
| Bullet Weight | Heavier bullets retain momentum better. |
| Wind | Causes horizontal drift. |
| Altitude | Higher altitude reduces air resistance. |
| Temperature | Affects air density and velocity. |
| Humidity | Slightly changes air density. |
| Gravity | Pulls the bullet downward throughout flight. |
Sample Ballistics Reference Table
| Range (yd) | Drop (in) | Velocity (fps) | Energy (ft-lbs) |
|---|---|---|---|
| 100 | 0 | 2450 | 2330 |
| 200 | -3.8 | 2310 | 2075 |
| 300 | -13.5 | 2180 | 1845 |
| 400 | -30.2 | 2050 | 1630 |
| 500 | -57.0 | 1925 | 1440 |
| 600 | -96.4 | 1805 | 1270 |
Values are for demonstration only. Actual results depend on the inputs entered into the calculator.
Ballistics Terms Every Shooter Should Know
| Term | Definition |
|---|---|
| Ballistic Coefficient | Measures how efficiently a bullet flies through the air. |
| Muzzle Velocity | Speed of the bullet leaving the barrel. |
| Bullet Drop | Vertical distance the bullet falls due to gravity. |
| Wind Drift | Horizontal bullet movement caused by wind. |
| MOA | Minute of Angle, a common scope adjustment unit. |
| MIL | Milliradian, another precision scope adjustment unit. |
| Zero Range | Distance where the rifle is sighted in. |
| Trajectory | The curved flight path of a bullet. |
| Kinetic Energy | Impact energy delivered to the target. |
| Time of Flight | Time required for the bullet to reach the target. |
Frequently Asked Questions
Is this ballistic calculator accurate?
The calculator provides reliable trajectory estimates when accurate firearm, ammunition, and environmental data are entered. For the best precision, use the exact ballistic coefficient and chronograph-measured muzzle velocity for your load.
What is the difference between G1 and G7?
G1 is designed for traditional flat-base bullets, while G7 is more suitable for modern long-range boat-tail bullets with low-drag profiles.
Why does altitude affect bullet trajectory?
Higher altitude means thinner air, which reduces aerodynamic drag. As a result, bullets generally retain velocity better and experience less drop over long distances.
Should I use MOA or MIL?
Use whichever matches your riflescope. MOA and MIL are both angular measurement systems used to adjust for bullet drop and wind drift.
Why is my calculated drop different from real-world results?
Differences can occur because of variations in actual muzzle velocity, bullet manufacturing tolerances, atmospheric conditions, rifle setup, or ammunition performance. Confirming your data through live-fire testing will produce the most accurate long-range solution.