Hit Factor Calculator

Hit factor is your points-per-second on a stage: HF = (scored points − penalties) / time. It's USPSA's great equalizer — it rewards the optimal balance of speed and accuracy rather than either alone. The highest hit factor on a stage wins that stage and takes 100% of the stage points; everyone else earns a percentage of the available points equal to their percentage of the stage-winning HF. Use the calculator above to see how a tenth of a second or a single Charlie swings your number.

HF = (Scored Points − Penalty Points) / Time, truncated (never rounded) to 4 decimal places. USPSA always truncates at the fourth decimal — 3.81799 becomes 3.8179, not 3.8180. Scored points come from your hits (A/C/D), penalties are −10 each for misses, no-shoots, and procedurals. The calculator above uses Math.trunc to match official PractiScore behavior exactly.

Alpha is always 5 points regardless of power factor. The difference is in the down-zones: Major scores C=4 and D=2, while Minor scores C=3 and D=1. A miss, no-shoot, or procedural is −10 in both. This is why Major shooters can get away with Charlies that would wreck a Minor shooter's hit factor. Major scoring is only worth chasing in divisions that allow it. Production, Carry Optics, Limited Optics, and PCC are Minor-only by rule — there is no reason to shoot anything heavier than 9mm in those divisions. Heavier calibers just produce more recoil with zero scoring benefit. The Major/Minor choice only matters in Open, Limited, Limited-10, Single Stack, and Revolver.

Say you shoot 20 rounds Minor: 16A, 3C, 1D, no penalties, in 12.50 seconds. Points = (16×5) + (3×3) + (1×1) = 80 + 9 + 1 = 90. HF = 90 / 12.50 = 7.2000. Now shoot the identical hits Major: (16×5)+(3×4)+(1×2) = 94, HF = 94/12.50 = 7.5200. Same hits, higher HF, because Major pays more for the down-points.

Forgetting that C and D values change between Major and Minor. Shooters running Minor (Production, Carry Optics, Limited Optics) plug in Major down-zone values and overestimate their score. In Minor a Charlie is only 3 points and a Delta is just 1 — a Minor shooter pays a 2-point premium per Charlie versus an Alpha, and 4 points per Delta. Always confirm your scoring mode before reading the result.

A miss is −10 points (you lose the 5 you'd have scored for an A AND eat a 10-point penalty — effectively a 15-point swing versus an Alpha). On a 6 HF stage that single Mike costs you 10/6 = 1.67 seconds of ghost time. No-shoots and procedurals are also −10 each. This is why calling your shots matters more than raw speed — one Mike can drop you from a stage win to mid-pack.

The stage winner's HF takes all available stage points (e.g., a 100-point stage). You earn your HF ÷ winner's HF × stage points. If the stage HHF is 8.0 and you shot 6.4, you get 80% of that stage's points. Add every stage's points across the match; most total points wins the division. Hit factor wins stages, stage points win matches.

Do the math: a make-up shot costs roughly your split time (~0.25–0.35s). It's worth it only if the points you recover, divided by stage HF, exceed that time. On a fast 8 HF stage, recovering a Minor Charlie (2 points) is worth only 2/8 = 0.25s — barely break-even, usually not worth the risk. On a tight 2 HF stage that same Charlie is worth a full second. Low-HF stages favor points; high-HF stages favor speed.

There's no universal number — it's stage-dependent and set against the HHF. Classification is percentage-based: 95%+ of HHF is GM, 85% Master, 75% A, 60% B, 40% C. On a classifier with an 8.66 HHF, a 79% A-class run is a 6.85 HF; GM needs ~8.23+. USPSA recalibrated all HHFs on April 2, 2025 using a Weibull/percentile model, so older app data may be stale — verify against uspsa.org.

USPSA truncates HF at four decimals by rule — it never rounds up. A computed 4.13888 is recorded as 4.1388. This matters at the top of a stacked stage where two GMs are separated by thousandths. The calculator above mirrors this with Math.trunc so your practice numbers match what PractiScore will show.