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 FileMaker Pro Custom Functions

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Distance ( lat1 ; lon1 ; lat2 ; lon2 )

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  Average rating: 4.5  (30 votes)
  Discuss this Custom Function

Dmitriy Bogdan, CIA

Calculate distance between two geo points in kilometers.

Sample Input:
Distance ( 45,034942 ; 38,976032 ; 45,237589 ; 38,125435 )
Sample Output:

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed


The haversine formula is an equation important in navigation, giving great-circle distances between two points on a sphere from their longitudes and latitudes. It is a special case of a more general formula in spherical trigonometry, the law of haversines, relating the sides and angles of spherical triangles.

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it



Thanks for the formula. What would I need to do to find the mileage between a start and end UK postcode?

Any help would be greatly appreciated please.

Duncan Rhodes, UK
December 04, 2015 1:32am

Filemaker does not allow the line: "dtor = 57,2958;"
The comma within the number seems to be what is producing the "lists are not allowed here" error...

Is there something Im missing? Is there another custom dtor function for this? Please help..

Kyle, WA
July 10, 2016 12:44pm

I was having the same issue as Kyle. I tried putting in a decimal and the numbers seem to be correct.

Dwight, Red Deer, Alberta Canada
August 28, 2017 7:55am

Make a comment about this Custom Function (please try to keep it brief & to the point). Anyone can post:

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characters left. If you paste in more than 1500 characters, it will be truncated. Discuss the function - advertisements and other useless posts will be deleted.
Answer 3 + 6 =
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