# Find Distance Between Two Points with Apps Script

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Curious to know how far is location A from location B? You can put the two places in separate cells in a Google Spreadsheet and then use the `getDirection()` function to find the distance between the two place in miles or kilometers.

Internally, it uses the Google Maps service of Apps Script to find the distance and directions between the two points. You can also use the `getMileage()` function to calculate the “as the crow flies” distance between any two latitude and longitude co-ordinates.

``````function getDirection(city1, city2) {

var directions = Maps.newDirectionFinder()
.setOrigin(city1).setDestination(city2)
.setMode(Maps.DirectionFinder.Mode.DRIVING)
.getDirections();

var d = directions.routes.legs.distance.text;

return parseInt(d.split(" ").replace(",", ""));;
}

function getMileage(city1, city2) {
var p1 = Maps.newGeocoder().geocode(city1);
var p2 = Maps.newGeocoder().geocode(city2);

return getDistance(getCoordinates(p1), getCoordinates(p2), opt);
}

function getCoordinates(point) {
var result = point.results.geometry.location;

return {"lng": result.lng, "lat": result.lat}
}

function getDistance(c1, c2, opt) {
var dLng = (lng2-lng1), dLat = (lat2-lat1);
var R = 6371/1.6;

var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
Math.sin(dLng/2) * Math.sin(dLng/2) *
Math.cos(lat1) *  Math.cos(lat2);
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));

return parseInt(R * c);
}

return degrees * Math.PI/180;
}``````

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Meet the Author

###### Web Geek, Google Developer Expert
A Amit Agarwal is a Google Developer Expert in Google Workspace and Google Apps Script. He holds an engineering degree in Computer Science (I.I.T.) and is the first professional blogger in India. He is the developer of Mail Merge for Gmail and Document Studio. Read more on Lifehacker and YourStory

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