Square Foot Calculator Map
Draw a shape around any property, lot, or piece of land on the map to calculate its exact square footage.
How to Calculate Area on a Map
Using a map to calculate square footage is perfect for large outdoor areas where physical measurement is difficult.
Step-by-Step Instructions
- Zoom and pan: Find the property or piece of land you want to measure. You can search or just drag the map.
- Start drawing: Click "Draw Shape".
- Place points: Click around the perimeter of the area you want to measure. Add as many points as needed to trace curves or irregular property lines.
- Finish shape: Click "Finish Shape" to close the polygon and calculate the area automatically.
Unit Conversions for Land
When measuring land, square footage is often converted into acres for easier comprehension:
- 1/4 Acre: ~10,890 sq ft
- 1/2 Acre: ~21,780 sq ft
- 1 Hectare: ~107,639 sq ft (2.47 acres)
Map Calculator Use Cases
A map-based square footage calculator is the fastest tool for measuring any outdoor area where physical measurement is impractical. Here are the most common applications:
| Use Case | What to Measure | Result Unit |
|---|---|---|
| Residential property | Outer boundary of the lot | Sq ft / acres |
| Agricultural land | Field or pasture boundary | Acres / hectares |
| Construction site | Site footprint | Sq ft / sq meters |
| Rooftop area | Building footprint (2D only) | Sq ft (no pitch adjustment) |
| Parking lot | Paved surface boundary | Sq ft |
| Forest or conservation land | Parcel boundary | Acres / hectares |
Understanding Land Measurement Units
Land area is expressed in different units depending on your country and the size of the parcel. This reference table converts the most common land area units so you can compare measurements globally.
| Unit | Square Feet | Square Meters | Acres |
|---|---|---|---|
| 1 sq ft | 1 | 0.0929 | 0.000023 |
| 1 sq meter | 10.764 | 1 | 0.000247 |
| 1 acre | 43,560 | 4,047 | 1 |
| 1 hectare | 107,639 | 10,000 | 2.471 |
| 1 sq mile | 27,878,400 | 2,589,988 | 640 |
| 1 sq km | 10,763,910 | 1,000,000 | 247.1 |
Map Measurement Tips for Better Accuracy
The accuracy of your map measurement depends directly on how carefully you trace the boundary. Follow these tips to get the most reliable result:
- Zoom in as far as possible: More zoom = more precision in where you place each point. The map's satellite imagery is typically accurate to within 1–2 meters at high zoom levels.
- Use satellite view: Switch from road map to satellite imagery to see the actual property boundaries, fences, or features clearly.
- Place points at every corner: For irregular shapes, click at every bend or change of direction in the boundary.
- Use more points for curves: Curved boundaries (like a river edge or circular lot) need many closely-spaced points to approximate the curve accurately.
- For legal disputes, use a surveyor: Map-based calculations are suitable for estimates and planning but are not legally admissible as a property survey.
All Square Foot Calculators
Choose a specialized calculator for your specific project type.
Frequently Asked Questions
Map calculations are highly accurate, usually within a few percent. Accuracy depends mostly on how carefully you trace the property boundaries. For legal property disputes, always consult a licensed surveyor.
A map calculation only gives you the 2D "footprint" area. It does not account for the pitch (slope) of the roof. For roofing, you must calculate the footprint area and multiply by a pitch multiplier.
We convert the GPS coordinates (latitude/longitude) to meters using a flat-earth projection, then apply the Shoelace Formula to calculate the area of the polygon.
Currently, you must pan and zoom to find your location. In a future update, we will add an address search bar.