golfcalc

Golf handicap calculator and launch monitor ballistics estimator. Built by GolfLaunchLab, an independent golf launch monitor review site.

Install

npm install golfcalc

Handicap Index

Calculate your USGA World Handicap System index:

const { handicapIndex } = require('golfcalc');

// [adjustedScore, courseRating, slopeRating]
const rounds = [
  [85, 72.1, 131],
  [88, 71.5, 128],
  [82, 70.8, 125],
  [90, 73.2, 135],
  [87, 72.1, 131],
];

console.log(handicapIndex(rounds)); // 11.4

Shot Distance

Estimate carry and total distance from launch monitor data:

const { carryDistance, totalDistance } = require('golfcalc');

// 7-iron: 132 mph ball speed, 16.5 deg launch, 7000 rpm spin
const carry = carryDistance(132, 16.5, 7000);
const total = totalDistance(132, 16.5, 7000);

// At altitude (Denver)
const carryDenver = carryDistance(132, 16.5, 7000, { altitudeFt: 5280 });

Optimal Launch

Find the best launch conditions for your ball speed:

const { optimalLaunch } = require('golfcalc');

const result = optimalLaunch(165);
console.log(result);
// { launchAngle: 12.5, spinRate: 2200, carryYards: 285.3 }

About

Built by GolfLaunchLab. We test and review golf launch monitors with TrackMan-validated data. See our reviews and guides.

License

MIT