mapbench

Area & Acreage · 27 free tools

Map Area, Land Area and Acreage Calculators

Area is the measurement people most often get wrong on a map, because it depends on the shape you trace and the projection behind the drawing. Start with the map area calculator to trace a boundary and read the enclosed area, use the acreage calculator when the answer should be in acres, and convert between units with the acres to hectares converter when the figure has to travel.

MapBench computes polygon area on the sphere rather than on the flattened screen, so a plot near the Arctic is not quietly understated the way a pixel-area measurement would understate it. What the geometry cannot know is where the legal parcel edge actually runs: fences, deed lines, easements and survey monuments are authoritative, and a drawn polygon is an estimate. Trace at a sensible zoom, compare with the deed area, and treat a large disagreement as a prompt to check the boundary rather than the units.

For the practical questions around land, use the farm, garden and fencing calculators for seed, soil, fence posts and irrigation. For circular ground, the radius hub covers circle area and radius-from-area conversions, and uploaded geometry can be measured with the GeoJSON area calculator instead of being drawn by hand.

Start with these

The three tools that answer the most common question in this cluster. Each page states its method, coverage and limits.

All area & acreage tools

Every tool in this cluster is linked from this page, so nothing here depends on a search box or a JavaScript menu to be reachable.

Map Area Calculator

Popular

Draw a polygon and get area in m2, km2, acres, hectares.

Worldwide

Acreage Map Calculator

Popular

Measure acres on a map by drawing the field or plot boundary.

Worldwide

Acres to Hectares Converter

Convert acres into hectares and square metres.

Worldwide

Lot Size Calculator

Popular

Draw a property boundary and get area in acres, square feet, m² and hectares.

Worldwide

Acres to Square Feet Converter

Convert acres to square feet.

Worldwide

Center of Polygon Finder

Estimate the center point of a polygon drawn on the map.

Worldwide

Circle Area From Radius Calculator

Calculate circle area and circumference from radius.

Worldwide

Circle Circumference From Radius

Calculate circumference and diameter from circle radius.

Worldwide

Equal Circle Overlap Calculator

Calculate overlap area and percentage for two equal-radius circles.

Worldwide

Hectares to Acres Converter

Convert hectares into acres and square metres.

Worldwide

Hectares to Square Kilometres Converter

Convert hectares into square kilometres.

Worldwide

Land Cost Per Acre Calculator

Calculate land price per acre from total price and acreage.

Worldwide

Land Cost Per Square Foot Calculator

Calculate property land cost per square foot and square metre.

Worldwide

Lot Depth From Area and Width

Calculate rectangular lot depth from known area and width.

Worldwide

Lot Width From Area and Depth

Calculate lot width from known area and depth.

Worldwide

Perimeter Calculator

Measure the perimeter of a polygon drawn on the map.

Worldwide

Points in Polygon Helper

Compare point sets and polygon areas visually on the map.

Worldwide

Polygon Area From Coordinates

Estimate polygon area from pasted latitude/longitude vertices.

Worldwide

Radius From Circle Area Calculator

Find circle radius and diameter from a known area.

Worldwide

Radius From Circumference Calculator

Find circle radius and diameter from circumference.

Worldwide

Rectangular Lot Acreage Calculator

Convert rectangular lot dimensions into square feet, acres and hectares.

Worldwide

Square Acreage From Perimeter

Estimate square area and acreage from total perimeter.

Worldwide

Square Kilometers to Square Miles Converter

Convert square kilometres to square miles and hectares.

Worldwide

Square Meters to Hectares Converter

Convert square metres into hectares.

Worldwide

Square Miles Calculator

Measure an area on the map and read square miles, km² and acres.

Worldwide

Square Miles to Square Kilometers Converter

Convert square miles to square kilometres and hectares.

Worldwide

Square Perimeter From Area Calculator

Calculate side length and perimeter of a square from area.

Worldwide

Learn more about area & acreage

Guides explain the method behind these numbers, the cases where it misleads, and how to choose between two tools that look interchangeable.

You may also need

These clusters answer the questions that usually follow a area and acreage tools result.

Best-of lists in this cluster

About this hub

27 tools are grouped here because they answer the same family of questions. Every result is produced in your browser from the method stated on its own page; for legal, surveying, safety-critical or regulated decisions, verify the answer with the responsible authority.

Browse all tools →·Mapping guides →·Methodology →