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ft-lbs KE
Free tools for the bowhunting side of the shop. The calculators run in your browser, no account needed. The logs that save your spots, cameras and harvests are tied to your free BowStrike account so they sync across your devices.
Enter your arrow's finished weight and measured speed for kinetic energy and momentum. Add the balance point for front-of-center. These decide how well an arrow penetrates — and what game it's suited to.
Kinetic energy = (grains × fps²) ÷ 450,800. Momentum = (grains × fps) ÷ 225,218. FOC uses the AMO method: 100 × (balance point − ½ arrow length) ÷ arrow length. Game guidance below follows commonly published Easton kinetic-energy ranges — treat it as a starting point, not a rule; shot placement and broadhead choice matter as much as raw energy.
Match your arrow's stiffness (spine) to your setup. Too weak or too stiff and the arrow won't fly true. Enter your bow and arrow numbers for a recommended spine to start from.
Spine is the shaft's deflection — a lower number is stiffer (a 340 is stiffer than a 500). Compound, recurve and longbow need very different spines at the same draw weight: a release-shot compound wants a much stiffer shaft than a finger-shot recurve or longbow. This estimate accounts for that, plus arrow length (longer needs stiffer) and point weight (heavier needs stiffer). It's a ballpark to start from, not gospel. For the exact shaft and model, run your numbers through Easton's arrow selector, then paper-tune to confirm.
Sight in at two distances, tell us the tape position for each, and this fills in a mark for every yardage in between — the math a single-pin slider shooter usually pays software for.
Measure each mark's position along the sight tape from the same end (top), in millimetres. Pick two distances as far apart as you shoot well — say 20 and 60.
The marks come from arrow-drop physics, anchored to your two real sight-ins — so between them they're dead on, and they extrapolate sensibly past them. Always shoot-verify before you hunt, especially past your farthest sight-in. Printers scale differently, so this gives you exact millimetre positions to mark by hand rather than a print-and-stick strip.
Sunrise and sunset for your exact spot, and the legal shooting window around them. Most states run 30 minutes before sunrise to 30 minutes after sunset — adjust to match your state, and always confirm the regulation yourself.
Sun times are computed for your coordinates and date (accurate to about a minute). The legal window is sunrise minus your offset to sunset plus your offset — the common “30 minutes before/after” rule. Shooting hours are set by state law and vary; verify yours.
The solunar theory says game moves most when the moon is overhead or underfoot (major periods) and at moonrise and moonset (minor periods). Here's tonight's moon and those windows for your spot — the free version of what the paid apps charge for.
Moon phase, rise/set and transit are computed for your coordinates (standard astronomical algorithms, no API). Solunar periods are a general activity guide, not a guarantee — weather, pressure, the rut and pure luck all matter. Treat a strong solunar window that lines up with legal shooting light as a day worth taking off work.
A deer's nose beats every other sense — hunt the wrong wind and you're busted before you see one. Here's the live wind for your spot and where your scent is blowing. Save your stands below with their best wind, and this will tell you which one to sit today.
Live wind from Open-Meteo (free, no account). "Wind from" is the compass direction the wind is blowing out of — your scent travels to the opposite side, so keep deer upwind of that. Speeds in mph.
Got one down? Find a shop that will cut, wrap and — if you want it — make the summer sausage and snack sticks. Search by how far you're willing to drive.
Distances are measured to the shop's town. Run one? It's free to list — you'll show up right here when a hunter has meat to drop off.
Green-score a typical whitetail rack the Pope & Young / Boone & Crockett way. Enter each antler's measurements to the eighth of an inch. Right and left are scored separately; the difference between them comes off the net.
Gross = inside spread (credited up to the longer main beam) + every measurement on both antlers. Deductions = the left-to-right difference of each matching measurement, plus abnormal points. This is a green score for your own reference — an official entry needs a certified measurer and a 60-day drying period. Pope & Young's typical-whitetail minimum is 125 (bow); Boone & Crockett is 160 (all-time 170).
Your private map of stands, blinds, cameras and sign. Drop a pin, name it, note the best wind and what you've seen there. Only you can see this — it's tied to your BowStrike account.
Log what your cameras caught and when. Over a season it builds a picture of which deer are working which spot, and at what time of day — so you know where to sit.
Your season's animals in one place. Score a buck above, then save it here with the date, weapon and spot — your record year over year, each with its Pope & Young net score.
Keep your hunting licenses and tags in one place — state and number for each, and whether a tag is still open or already filled. Private to your account, so it's there in the field when a warden asks or you're double-checking what you've still got to fill.
These are on the list but not built yet. Tap the ones you'd actually use — that's how we decide what comes next. Don't see it? Suggest your own at the bottom.