Tracing route and distance calculation - Google Maps

Hello, my question is in relation to the Haversine formula where, I have several geographical points (Latitude and Longitude) and when moving to the formula, the distance traveled is not returning the same result as the Google Maps site myself Returns. I would like to know if you have any other way that I can perform the calculation of distance containing several points. Or, if there are any APIs that mount the route according to the points I have already would help me a lot. Note: I can not post an example of the problem because there are many same location points. If my question is difficult to understand, please let me know.