Google Maps Kilometre Calculator
Enter start and end coordinates to calculate direct distance in kilometres, then estimate road distance and travel time.
Tip: In Google Maps, right-click any point and copy coordinates. This tool computes straight-line distance using the Haversine formula.
How this Google Maps kilometre calculator works
This tool helps you estimate distance in kilometres between two map points using latitude and longitude. It is ideal when you need a quick answer for route planning, mileage budgeting, logistics, cycling routes, and travel time estimates.
The calculator first computes the straight-line (as-the-crow-flies) distance using the Haversine formula. Because roads rarely follow a perfect straight path, it then applies a configurable percentage adjustment to produce a more realistic estimated road distance.
Step-by-step: finding coordinates in Google Maps
Desktop method
- Open Google Maps and zoom to your start location.
- Right-click on the point and click the coordinates shown in the menu.
- Paste latitude and longitude into the start fields.
- Repeat for your destination point.
Mobile method
- Tap and hold a location pin in Google Maps.
- Swipe up on the place details card.
- Copy the coordinate values and paste into this calculator.
Why straight-line distance and driving distance are different
Many users search for a map distance calculator in km expecting exact road distance from Google Maps. The challenge is that exact route distance depends on turn-by-turn routing data and live map intelligence. A geometric distance calculator does not use traffic, road hierarchy, or legal restrictions.
In practice, road distance is often 10% to 40% longer than straight-line distance, depending on terrain, city design, bridges, and available highways. That is why this calculator includes a route adjustment percentage.
Quick guideline for road adjustment
- 10%–15%: Grid-style urban roads with many direct links.
- 20%–30%: Typical intercity or mixed urban/suburban routes.
- 30%+: Mountain areas, islands, river crossings, or sparse road networks.
Best use cases for a kilometre calculator
- Estimating travel reimbursements and mileage costs.
- Planning delivery zones and service radius.
- Comparing candidate office or warehouse locations.
- Pre-planning cycling, hiking, or running route effort.
- Creating quick ETAs for customers before final routing.
Accuracy tips
1) Use precise pin locations
If you use city-center coordinates instead of exact addresses, your output can drift significantly. Zoom in and capture exact start/end points whenever possible.
2) Match speed to route type
Set average speed based on realistic conditions. City deliveries may average 25–40 km/h, while open highway legs can exceed 80 km/h.
3) Adjust for known detours
If you know a route includes bridges, toll roads, or limited highway access, increase the adjustment percentage before calculating.
Frequently asked questions
Does this calculator replace Google Maps navigation?
No. It is designed for quick distance and time estimation. For official turn-by-turn instructions, always use live Google Maps routing.
Can I calculate miles too?
Yes. The result includes kilometres and miles automatically.
Why does my result differ from Google Maps by 5–20 km?
Google Maps routes according to current road rules and route choices, while this tool uses coordinate geometry plus your selected adjustment percentage.
Final thoughts
A Google Maps kilometre calculator is one of the fastest ways to estimate distance when you only have coordinates. For planners, freelancers, couriers, and travelers, it delivers practical insight in seconds. Use the adjustment factor wisely, and you will get highly useful estimates for budgeting, scheduling, and decision-making.