This is Civil length related calculator , this will accept mixed foot , meter as example described bellow
Few Examples below
1) To Convert Meter cm mm to feet inches
2mm4cm5M to feet inches conversion
23" to Meter cm mm conversion
2) To calculate mixed many lengths
2mm-4mm -2’3”-4mm+2mm31cm+3mm+10cm+1’3"-24"+24mm
OR
(7’3”-2’3”)-(10”-2”)
OR
((2’3”-4mm)-(7’-9mm))-27mm2cm
3) To find area
(2mm2cm-4mm3M)x(23"+2cm5M)
OR
(2’3”-4mm)x(7’-9mm)
OR
((2mm31cm+3mm+10cm+1’)-(20mm-10mm))x(12’12”-2’2”)
3) To find Volume
(2mm2cm-4mm3M)x(23"+2cm5M)x3cm4M
OR
(2’3”-4mm)x(7’-9mm)x(23"-2mm3cm)
OR
((2mm31cm+3mm+10cm+1’)-(20mm-10mm))x(12’12”-2’2”)x23"
Click suitable button for conversion Area or Volume because after Calculating in mm scale it is converting the result to what ever button you click.