You can measure pitch speed with a radar gun, a smartphone app, a high-end tracking system, or even a stopwatch and some basic math. The method you choose depends on your budget and how precise you need the reading to be. Each approach has tradeoffs in accuracy, cost, and convenience, and understanding how they work will help you get reliable numbers no matter which one you pick.
Radar Guns: The Standard Tool
Handheld radar guns are the most common way to measure pitch speed outside of a professional stadium. They work by bouncing a microwave signal off the moving ball and calculating velocity from the frequency shift of the returning signal. Consumer models like the Pocket Radar Smart Coach are accurate to within 1 mph and can detect a baseball or softball from up to 120 feet away, which comfortably covers the full distance from a pitcher’s mound to home plate.
Radar guns range from about $100 for basic models to $300 or more for units with app connectivity and data logging. For casual use at practice or tryouts, even an entry-level gun gives you a useful reading. The key is understanding how to position yourself when using one.
Where You Stand Matters
Radar measures speed along the line between the gun and the ball. If you’re standing off to the side, the gun only detects the portion of the ball’s motion coming toward (or going away from) you. This is called the cosine effect, and it always produces a reading lower than the ball’s true speed. The error becomes significant once the angle between the gun and the ball’s flight path exceeds about 10 degrees. At 90 degrees (standing directly beside the pitch), the gun reads zero because no motion is directed toward or away from it.
For the most accurate reading, stand directly behind home plate looking back at the pitcher, or directly behind the pitcher looking toward the plate. Either position keeps the angle close to zero. If you’re stuck in a dugout or off to one side, your readings will consistently undercount by a few mph, and there’s no reliable way to correct for that in the moment.
Tracking Systems for Serious Training
Facilities and college programs often use radar-based or camera-based tracking systems that capture far more than just velocity. Trackman, the radar system installed in every MLB stadium, measures pitch speed at the release point and tracks the ball’s full trajectory. Rapsodo combines radar with an optical camera to directly measure spin rate and axis, then derives movement and trajectory from that data.
These systems cost thousands of dollars, so most individuals access them through training facilities that charge per session or monthly membership. If you’re developing as a pitcher and want spin rate, movement profiles, and release point data alongside velocity, a session on one of these systems is worth the investment. For pure speed measurement, though, a handheld radar gun gets you the same number.
One limitation worth knowing: Trackman radar struggles with certain pitch types. It drops roughly 90% of readings on true 12-6 curveballs and can’t reliably capture spin rate on very low-spin pitches like knuckleballs and true splitters. Rapsodo handles these better because it measures spin directly through its camera rather than inferring it from radar data.
Smartphone Apps and Video Analysis
Several smartphone apps estimate pitch speed by analyzing video frame by frame. You record a pitch, mark the ball’s position in each frame, and the app calculates how far the ball traveled between frames. Knowing the frame rate of the video and the real-world distance, the software converts pixels into speed.
The accuracy depends heavily on your phone’s camera. Most smartphones shoot at 30 or 60 frames per second in standard mode, which means each frame represents a relatively large chunk of time. A 70 mph pitch travels roughly 6.8 feet between frames at 30 fps. That’s a lot of distance to estimate from a small, blurry ball on a phone screen. Phones that shoot at 120 or 240 fps in slow-motion mode give you much tighter intervals, improving accuracy considerably.
Video-based apps are useful as a free or low-cost option, but expect error margins of 3 to 5 mph or more depending on camera angle, lighting, and how precisely you can identify the ball’s position in each frame. They work best as a rough estimate or a way to track relative improvement over time rather than as an absolute measurement.
The Stopwatch Method
If you have no equipment at all, you can estimate pitch speed with a tape measure, a stopwatch, and simple arithmetic. Measure the distance from the release point to the catcher’s glove (roughly 55 feet for a pitcher with average extension on a 60-foot-6-inch mound). Time the pitch from release to catch. Then plug the numbers into this formula:
Speed (mph) = Distance (feet) ÷ (Time (seconds) × 1.467)
The 1.467 factor converts feet per second into miles per hour. So if a pitch covers 55 feet in 0.50 seconds, that’s 55 ÷ 0.7335, or about 75 mph.
This method is the least precise of all your options. Human reaction time on a stopwatch is typically 0.15 to 0.25 seconds, and even a tenth of a second error on a sub-second measurement throws the result off by 10 mph or more. It’s a fun exercise for understanding the physics, but don’t rely on it for accurate numbers.
Release Speed vs. Plate Speed
One detail that trips people up: the speed you see on a stadium scoreboard isn’t the speed of the ball when it crosses the plate. Air resistance slows a baseball significantly over 60 feet. A pitch released at 90 mph arrives at home plate traveling only about 80 mph. A 100 mph fastball drops to around 88 mph. That’s roughly a 10% loss across the board, give or take a mile per hour depending on the pitch.
Before MLB adopted its current Statcast system, the older PITCHf/x technology reported velocity at 50 feet from the back of home plate rather than at release. That measurement point was about 10 feet in front of the pitcher’s hand, so the reported speeds were slightly lower than the release-point numbers Statcast now uses. If you’re comparing your radar gun readings to modern MLB stats, your gun may read a couple mph lower because consumer radar picks up the ball after it has already lost some speed leaving the hand.
Why Extension Changes Perceived Speed
Two pitchers can throw at the same radar-gun velocity and yet feel completely different to a batter. The reason is extension, how far forward the pitcher’s hand is from the rubber when the ball leaves it. A pitcher with long extension releases the ball several feet closer to home plate, giving the batter less reaction time even though the radar reading is identical.
MLB tracks this as “perceived velocity,” a stat that adjusts the raw speed based on where the ball was released relative to the average major league release point. A pitcher who throws 93 mph with elite extension might have a perceived velocity of 95 or 96 mph. For training purposes, this means working on your stride length and mechanics can make your pitches play faster without any actual gain on the radar gun.
Getting the Most Accurate Reading
Whichever method you choose, a few habits will keep your numbers consistent and reliable:
- Align the gun with the pitch. Stand directly behind the catcher or directly behind the pitcher. Even a 15-degree angle shaves a couple mph off the reading.
- Measure multiple pitches. A single reading can be an outlier. Track 10 or more throws and look at the average and the peak.
- Note the conditions. Cold, dense air creates more drag and can reduce both actual and measured velocity by 1 to 2 mph compared to a warm day.
- Be consistent with distance. If you’re using a stopwatch or video method, always measure from the same release point. Moving the mound distance even a few feet changes the calculation significantly.
- Compare like to like. Release-point speed (Statcast style) will always be higher than the speed measured partway to the plate. Know which number your device reports before comparing yourself to published stats.