Add, subtract and convert feet and inches measurements, with results in decimal feet, inches, centimetres and metres.
First measurement
Second measurement
The result is shown in feet and inches, total inches, decimal feet, centimetres and metres, so you can use whichever unit your job needs.
Because there are 12 inches in a foot, adding and subtracting measurements by hand means carrying and borrowing units. This calculator handles that for you and converts to metric at the same time — handy when a drawing mixes imperial and metric.
Convert each measurement to total inches, add them, then convert back to feet and inches by dividing by 12. The calculator does all of this instantly.
There are 12 inches in one foot, which is why adding and subtracting feet and inches needs carrying and borrowing.
Yes. Choose subtract and the calculator shows the difference, including a negative result if the second measurement is larger.
Multiply the total inches by 2.54 to get centimetres, then divide by 100 for metres. The calculator shows both automatically.
Many UK drawings and products mix the two systems. Converting as you measure avoids errors when ordering materials or setting out.
Convert between inch fractions, decimal inches and millimetres, with the nearest fraction to any decimal or metric value.
OpenConvert between real size and scaled size for models, drawings and maps using any scale ratio such as 1:50 or 1:100.
OpenConvert between linear feet and square feet using the material width, for flooring, decking, fencing and boards.
Open