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Unit Converter / Area

Area & Land Converter

Convert square metres, hectares, square kilometres, Taiwanese land units, acres and square feet for property and engineering work.

Back to Converter HubLocal Browser-local conversion · no upload

Unit workspace

Convert any supported unit locally; no server processing is involved.

Supports decimals, scientific notation, simple fractions and mixed fractions.

Reference basis: 1 square metre = approximately 0.3025 ping.

Live all-unit matrix

Edit any row; all other units update immediately.

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Enter a value to calculate every unit locally.

Features and quick guide

Area & Land Converter features

Link m², ha, km², ping, jia, fen, acres and ft² at once, with engineering references on every row instead of a single-unit dropdown workflow.

3-step quick guide

  1. 1
    Choose square metres, a land unit or another source unit.
  2. 2
    Enter a value and review every area and land unit.
  3. 3
    Edit any row directly and copy the result.

Local privacy statement

Land and area values are calculated locally without server transmission or remote storage.

No login, membership or server processing is required.

Frequently asked questions

What are the ping, jia and fen references?

The tool uses 1 ping = 400/121 m², 1 jia = 2,934 ping and 1 fen = 1/10 jia as common Taiwan land references.

Is it suitable for cadastral contracts?

It is useful for estimates and data preparation; official transactions and surveys should follow the governing standard.

Does it suffer floating-point drift?

Core conversions use BigInt-backed rational arithmetic and controlled formatting to avoid ordinary binary-float accumulation.