Google Distance Calculator (Straight-Line)
Enter two coordinate pairs in latitude, longitude format to estimate the direct (great-circle) distance between locations, similar to a Google Maps "measure distance" check.
What this Google distance calculator does
This tool helps you calculate the shortest path over the Earth’s surface between two points, often called the straight-line or as-the-crow-flies distance. It is useful when you want a quick geographic estimate before checking road routes in Google Maps.
Unlike a full driving route planner, this calculator does not follow streets, traffic patterns, toll roads, ferry lines, or turn-by-turn constraints. It gives you a clean baseline distance using latitude and longitude coordinates.
How to use it
1) Enter coordinates
Type each location in decimal format: latitude, longitude. For example:
- New York City: 40.7128, -74.0060
- Los Angeles: 34.0522, -118.2437
- London: 51.5074, -0.1278
2) Choose a unit
You can display the primary result in kilometers, miles, or nautical miles. The calculator also shows conversions for all three units so you can compare quickly.
3) (Optional) Add speed for ETA
If you enter an average speed in km/h, you’ll get a rough travel-time estimate. This is not a real driving ETA, but it can help with planning drafts or quick feasibility checks.
Why your Google Maps route distance may be different
When you compare this calculator to Google Maps directions, your route distance is usually longer. That is expected. Google Maps follows actual roads and travel rules, while this tool computes a direct geodesic path between two coordinates.
- Road geometry adds curves and detours.
- Highways, one-way streets, and restricted roads change route shape.
- Transit and walking modes follow network constraints.
- Traffic and rerouting affect real-world trip distance and time.
The math behind the calculator
This page uses the Haversine formula, which estimates distance between two latitude/longitude points on a sphere. It is widely used for practical mapping tasks and produces accurate results for most everyday use cases.
In simple terms, we convert degrees to radians, compute angular separation, then multiply by Earth’s radius to get distance. The tool uses a standard Earth radius of about 6,371 km.
Best use cases
- Comparing city-to-city direct distances
- Trip planning and rough budget forecasting
- Delivery zone checks and territory sizing
- Aviation and marine pre-calculations (nautical miles)
- Geography education and data analysis
Pro tips for better results
Use precise coordinates
More decimal places usually means better precision. Four to six decimal places are enough for most practical purposes.
Validate with Google Maps when route details matter
After getting your baseline number here, open Google Maps for route-specific distance and timing. Straight-line distance is ideal for screening and planning; route distance is best for final logistics decisions.
Understand the estimate type
Time estimates on this page are based on your average speed input and straight-line distance. Use them as quick planning ranges, not guaranteed travel schedules.
Frequently asked questions
Is this the same as Google Maps driving distance?
No. This calculates straight-line distance. Driving distance depends on roads and route choices.
Can I enter place names instead of coordinates?
This version is coordinate-based for reliability and speed. If you have place names, convert them to latitude/longitude first, then paste them here.
How accurate is the result?
For straight-line measurement, it is generally very accurate. Small differences can appear versus professional GIS tools due to Earth model and rounding choices.
Final thoughts
If you need a fast, lightweight way to calculate distance between two points, this Google distance calculator is an excellent starting point. It’s simple, immediate, and useful for planning, analytics, and education. For final navigation, pair it with Google Maps route directions to get realistic turn-by-turn values.