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Survey Area Calculator

Calculate area using common field-survey methods including rectangle, triangle, trapezoid and Simpson’s 1/3 rule.

For Simpson 1/3: enter equally spaced ordinates separated by commas/spaces; there must be an odd number of ordinates (3, 5, 7...).
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How to use this calculator

What to enter

Enter or select the following as requested: Shape / Method; Length / Base / Interval; Width / Side / Base 2; Extra value (triangle side or trapezoid height); Simpson Ordinates. Follow the units, valid ranges, examples, and options displayed beside each field.

What the result means

The area result estimates the two-dimensional surface covered by the dimensions entered. Check the displayed unit (for example, square metres or square feet) and whether openings, slopes, or waste allowances are included.

When to use it

Use this to estimate surface area for planning, material quantities, space measurement, or land measurement. Confirm that all dimensions use compatible units.