Plot Area Calculator – Convert Acres, Hectares, Sq Feet, Yards & More

Plot Area Calculator

Select Shape Rectangle Triangle Trapezoid Circle Sector Ellipse Parallelogram

crop_16_9 Rectangle

change_history Triangle

filter_frames Trapezoid

circle Circle

pie_chart Sector

radio_button_unchecked Ellipse

function Parallelogram

Related Triangle area  Calculator

Calculate area quickly for common geometric plot shapes and convert results into square metres, square feet, acres, hectares and more.

Useful for real estate, farming, construction, landscaping, and students.

Why use this Plot Area Calculator?

• Supports 7 geometric shapes: Rectangle, Triangle, Trapezoid, Circle, Sector, Ellipse, Parallelogram.
• Per-input length units (metres, feet, inches, yards, km, miles, cm).
• Converts and displays results in multiple area units including square metres, square feet, acres and hectares.
• Fast, accurate, avoids manual errors and suitable for mobile and desktop.

Shapes & Formulas

Rectangle

Formula: Area = Length × Width

Triangle

Formula: Area = ½ × Base × Height

Trapezoid

Formula: Area = ½ × (a + b) × Height where a and b are the two parallel bases.

Circle

Formula: Area = π × r² where r is the radius.

Sector

Formula: Area = (θ / 360) × π × r² where θ is the central angle in degrees.

Ellipse

Formula: Area = π × a × b where a and b are semi-major and semi-minor axes.

Parallelogram

Formula: Area = Base × Height

Units supported

Enter lengths in any of these units; internally the tool converts to metres before computing area:

• Metres (m)
• Feet (ft)
• Inches (in)
• Yards (yd)
• Kilometres (km)
• Miles (mi)
• Centimetres (cm)

Output (area) units

Results are shown in:

• Square Metres (m²)
• Square Feet (ft²)
• Square Yards (yd²)
• Square Inches (in²)
• Square Kilometres (km²)
• Square Centimetres (cm²)
• Acre
• Hectare (ha)

How the calculator works

1. You select the shape and enter required dimensions (each dimension can have its own length unit).
2. The tool converts each input length to metres using accurate conversion factors.
3. It applies the shape’s area formula (calculations in m²).
4. The tool converts the result to the other area units (sq ft, acre, hectare, etc.) and displays them.

Why convert to metres first? Doing internal calculations in a single base unit (metre) avoids rounding/precision inconsistencies that can appear when mixing units.

Conversion factors (useful reference)

Unit	Linear conversion to 1 metre	Notes
Metre (m)	1	Base unit
Centimetre (cm)	0.01 m	100 cm = 1 m
Inch (in)	0.0254 m	1 in = 2.54 cm
Foot (ft)	0.3048 m	1 ft = 12 in
Yard (yd)	0.9144 m	1 yd = 3 ft
Kilometre (km)	1000 m	1000 m = 1 km
Mile (mi)	1609.344 m	International mile

Area-specific conversions

Common reference conversions for area:

• 1 m² = 10.7639104167 ft²
• 1 acre = 4,046.8564224 m²
• 1 hectare = 10,000 m²
• 1 km² = 1,000,000 m²

Worked examples

Example 1 — Rectangle

Length = 100 ft, Width = 40 ft

Steps:

1. Convert to metres: 100 ft × 0.3048 = 30.48 m; 40 ft × 0.3048 = 12.192 m
2. Area in m² = 30.48 × 12.192 = 371.61216 m²
3. Area in acres = 371.61216 / 4046.8564224 ≈ 0.09183 acres
4. Area in hectares = 371.61216 / 10000 = 0.037161 ha

Example 2 — Circle

Radius = 10 m

1. Area in m² = π × 10² = π × 100 ≈ 314.1593 m²
2. Area in acres = 314.1593 / 4046.8564224 ≈ 0.07763 acres
3. Area in hectares = 314.1593 / 10000 = 0.0314159 ha

Example 3 — Sector

Radius = 1 m, Angle = 90° (quarter circle)

1. Full circle area = π × 1² = π ≈ 3.14159 m²
2. Sector area = (90 / 360) × π = 0.25 × π ≈ 0.785398 m²
3. In acres = 0.785398 / 4046.8564224 ≈ 0.0001941 acres

Tips & Best Practices

• Always use perpendicular height: For triangles/parallelograms/trapezoids, the height must be perpendicular to the base used in the formula.
• Use consistent units if possible: Although the calculator converts automatically, entering values in consistent units reduces user error.
• Round sensibly: For display purposes round results to 3–6 significant digits; keep internal calculations precise.
• Check angles: Sector angle must be in degrees between 0 and 360 (exclusive of 0).

Frequently Asked Questions (FAQ)

Q: Why does the calculator convert values to metres first?

A: Converting to one consistent base unit (metres) ensures accurate application of formulas and consistent conversions to area units (square metres, acres, hectares, etc.).

Q: Are the acre and hectare results accurate?

A: Yes. This calculator uses the standard conversions: 1 acre = 4,046.8564224 m² and 1 hectare = 10,000 m².

Q: Can I use mixed units (e.g., length in feet and width in metres)?

A: Yes. The calculator accepts different units per input; it converts each value to metres internally before computing the area.

Q: What if I need local units (e.g., bigha, guntha)?

A: Those local units can be added easily. If you want, I can extend the tool to include Indian land units like bigha, guntha, gaj, or local acre variations.

Conclusion

This Plot Area Calculator is a practical and precise tool for anyone who needs to measure land or shapes quickly. It supports multiple shapes, per-input unit selection, and converts results into the most useful area units — including acres and hectares.