Volume and scientific units
Convert volume, pressure, energy or speed within the same physical quantity. Select the quantity first, then choose both units again.
Home and conversions calculators
First identify whether you are measuring length, floor area, wall area or materials, then use consistent units.
Which tool fits this question?
The ping converter converts area units only. The room tool calculates floors and walls excluding openings. Paint also needs coat count, product coverage and can size. Electricity use gives kWh; appliance costs additionally need your unit price.
- What wall area remains after measuring the room and subtracting openings?
- How many liters and cans of one paint product cover my area?
- What is the estimated electricity cost from watts, time and price per kWh?
Do not substitute floor area for wall area or assume the same coverage for every product. An example electricity price does not reproduce a household tiered bill.
Home and conversions · 13 tools
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Appliance electricity cost
Estimate one appliance's energy cost using your own power and tariff assumptions. Enter average operating power rather than assuming rated maximum power is used continuously.
Length conversion
Convert a measured length between metric and customary units. Keep the same physical dimension when comparing a space with furniture.
Area and Taiwan ping
Convert area between square metres, square feet and Taiwan ping. This is an area conversion rather than a judgement about property records.
Weight conversion
Convert metric and customary weight units, including Taiwan jin and liang. Choose units explicitly to avoid regional naming differences.
Temperature conversion
Convert a temperature between Celsius, Fahrenheit and kelvin. Select the original scale before entering the reading.
Floor and wall area
Estimate rectangular floor area and the surrounding wall area. Measure all lengths in metres.
Appliance energy use
Estimate electricity consumed by one appliance over a period. Use realistic average power when the appliance cycles on and off.
Moving-in cash budget
Estimate how much cash you need before moving into a rented home. Include both refundable cash tied up and expenses you expect to spend.
Screen pixel density and size
Estimate a rectangular screen's pixel density and visible width and height. Use the physical visible diagonal and the product's native resolution.
Tiles and whole boxes
Estimate tile pieces and whole boxes for a measured area. Choose a waste allowance for your own layout.
Wallpaper rolls and pattern repeat
Estimate strips and rolls for walls of the same height. Include trimming and an optional straight-match vertical repeat.
Paint litres and whole cans
Estimate paint volume and whole cans for one product. Calculate primer and topcoat separately when their coverage differs.