Overview
Convert between common area units such as square millimetres, square centimetres, square metres, hectares, square feet and acres.
Objective
Use the correct measurements, units and method to produce an accurate, clearly labelled result.
What You Need
- An area value
- The starting area unit
- The target area unit
- Calculator if needed
Before You Start
Write down the value or dimensions you have, including their units. Decide exactly what unit or result you need before calculating. Keeping the units visible makes errors much easier to spot.
How to Do It
- Identify both area units.
- Use an area conversion factor, not a length factor.
- Multiply or divide as required.
- Round only at the end if necessary.
- Label the result with the squared unit.
Worked Example
Convert 3 m² to cm². Because 1 m = 100 cm, 1 m² = 10,000 cm². Therefore 3 m² = 30,000 cm².
Useful Tips
- Remember that area conversions are squared.
- Keep extra decimal places until the final step.
- Sketch the area if the scale change is confusing.
Common Mistakes
- Using 100 instead of 10,000 for m² to cm².
- Forgetting the squared symbol.
- Rounding too early.
Important Notes
Conversion factors and measurement standards can vary by country or context. When accuracy matters, confirm the standard being used and keep enough decimal places until the final answer.
FAQ
When should I round the answer?
Keep the full value during the calculation and round at the end to a level of precision suitable for the task.
Why should I always write the units?
The unit tells you what the number represents and helps reveal mistakes when converting or calculating.