What Is the Bullet Drop Calculator?
The Bullet Drop Calculator is a free online tool designed for users who need quick, accurate calculations in the practical calculation space. By entering your caliber / cartridge preset, muzzle velocity, bullet weight, you get instant results including muzzle energy, zero range. No formulas to memorize, no spreadsheets to build — just enter your numbers and get the answer in seconds. Whether you're a beginner or experienced professional, this calculator saves you time and eliminates guesswork.
Why This Calculation Matters
Getting muzzle energy right can make the difference between success and costly mistakes. In practical calculation, small errors compound quickly. Manual calculations are error-prone and time-consuming, especially under pressure. This calculator applies proven formulas used by users worldwide, giving you confidence that your numbers are correct. Use it to get accurate results with precision and avoid common pitfalls that trip up beginners.
When Should You Use This Calculator?
This tool is most useful when you know your caliber / cartridge preset and need to find the right muzzle energy. It's also great for quick estimates before committing to a decision, and to double-check manual calculations or professional quotes, and when comparing different scenarios side by side. Bookmark this page and come back whenever you need a fast, reliable answer — the calculator is always free and requires no signup.
Bullet Drop Calculator
| Range (yd) | Drop (in) | Velocity (fps) | Energy (ft-lbs) | Holdover MOA | Holdover MIL |
|---|
Common Cartridge Ballistic Comparison
Approximate performance at 300 yards with typical hunting loads, zeroed at 100 yards.
| Cartridge | Muzzle Vel (fps) | BC (G1) | Drop at 300yd | Energy at 300yd |
|---|---|---|---|---|
| .223 Rem 55gr | 3,240 | 0.243 | -11.5" | 620 ft-lbs |
| .308 Win 168gr | 2,650 | 0.462 | -13.8" | 1,575 ft-lbs |
| 6.5 Creedmoor 140gr | 2,710 | 0.530 | -11.2" | 1,620 ft-lbs |
| .30-06 165gr | 2,800 | 0.477 | -12.0" | 1,740 ft-lbs |
| .300 Win Mag 180gr | 2,960 | 0.507 | -9.8" | 2,100 ft-lbs |
| .22 LR 40gr | 1,200 | 0.130 | -78" | 65 ft-lbs |
| 12ga Slug 437gr | 1,600 | 0.065 | -42" | 1,150 ft-lbs |
How to Use This Calculator
- Enter Your Caliber / Cartridge Preset: Start by entering your caliber / cartridge preset — this is the primary input for the calculation.
- Fill In Additional Details: Complete the remaining fields: muzzle velocity, bullet weight, ballistic coefficient, zero range, crosswind speed. Each value refines the calculation for greater accuracy.
- Click Calculate: Hit the Calculate button to run the numbers. Results appear instantly below.
- Review Your Results: Check your muzzle energy, zero range. Use these figures to inform your next decision or compare against alternative scenarios.
How It Works
This bullet drop calculator uses a simplified flat-fire ballistic model with drag to estimate bullet trajectory at various distances. It accounts for gravity drop, air resistance via the G1 ballistic coefficient, and optional crosswind drift.
The basic rule:
- Select a preset caliber or enter custom ballistic data (muzzle velocity, bullet weight, BC)
- The calculator computes trajectory at 50-yard increments from 100 to 1000 yards
- Drop, remaining velocity, energy, and holdover (MOA and MIL) are displayed for each range
Results are approximations for standard sea-level conditions. Real-world performance varies with altitude, temperature, humidity, and barrel length. Always confirm zero at the range before relying on calculated holdovers.
Tips & Considerations
- Double-check your caliber / cartridge preset before calculating — even small input errors can significantly change your results.
- Run the calculator with different values to compare scenarios and find the optimal approach for your situation.
- Pay attention to both muzzle energy and zero range — they work together to give you the full picture.
- Bookmark this page for quick access next time you need to get accurate results.
- If you're unsure about your crosswind speed, start with a conservative estimate and adjust from there.
Frequently Asked Questions
How accurate is this bullet drop calculator?
This calculator uses a simplified flat-fire drag model that is reasonably accurate out to moderate ranges for most rifle cartridges. For precision long-range work beyond 600 yards, dedicated ballistic software accounting for Coriolis effect, spin drift, and atmospheric conditions will be more precise.
What is ballistic coefficient (BC)?
Ballistic coefficient measures a bullet's ability to overcome air resistance. A higher BC means the bullet retains velocity and energy better over distance. BC values are specific to each bullet design and weight. G1 is the most common reference standard.
What is the difference between MOA and MIL holdover?
MOA (Minute of Angle) equals approximately 1.047 inches at 100 yards. MIL (milliradian) equals approximately 3.6 inches at 100 yards. Most American scopes use MOA adjustments while many tactical and European scopes use MIL. Both measure the same angle, just in different units.
Why does my bullet drop so much past 500 yards?
Bullet drop increases exponentially with distance because gravity acts on the bullet for a longer time as it slows down. Air resistance continuously decelerates the bullet, so it spends more time in flight at longer ranges, allowing gravity to pull it further below the line of sight.
What zero range should I use?
A 100-yard zero is the most common for hunting rifles. Some shooters prefer a 200-yard zero for flatter trajectory at moderate ranges, accepting a slight high impact at 100 yards. For rimfire or short-range cartridges, a 50-yard zero is typical.
How does wind affect bullet trajectory?
A crosswind pushes the bullet sideways throughout its flight. The deflection increases with range and is worse for slower, lower-BC bullets. A 10 mph crosswind can push a .308 bullet over 10 inches at 300 yards and over 60 inches at 600 yards.