About the Conversion Calculator
Convert between metric, imperial and other units across ten categories — length, weight, temperature, area, volume, speed, time, digital storage, pressure and energy — with an at-a-glance table of every unit.
How to use it
- Choose a category.
- Enter a value and pick the “from” and “to” units.
- Use the swap button or scan the full table.
Formula & method
Result = value × from-factor ÷ to-factor
°F = °C × 9/5 + 32Frequently asked questions
How many perches are in an acre?
There are 160 perches in an acre. One perch is about 25.29 square metres.
Results are estimates for general information only and are not financial, tax, legal or medical advice. Please confirm important decisions with a qualified professional.