家居和DIY

1 inch = 2.54 cm

1 foot = 0.3048 m

(ft × 30.48) + (in × 2.54) = cm

1 yard = 0.9144 m

1 mile = 1.609344 km

1 mm = 0.03937 in

1 cm = 0.3937 in

1 m = 3.28084 ft

1 m = 1.09361 yd

1 km = 0.621371 mi

1 cm = 0.0328084 ft

1 mm = 0.00328084 ft

1 in² = 6.4516 cm²

1 ft² = 0.092903 m²

1 yd² = 0.836127 m²

1 acre = 0.404686 ha

1 mi² = 2.58999 km²

1 cm² = 0.155 in²

1 m² = 10.7639 ft²

1 m² = 1.19599 yd²

1 ha = 2.47105 acres

1 km² = 0.386102 mi²

1° = π/180 rad ≈ 0.0174533 rad

1° = 1.11111 gon

1 rad = 180/π ≈ 57.29578°

1 gon = 0.9°

1 rad = 63.662 gon

1 gon = 0.015708 rad

1 cal = 4.184 J

1 kcal = 4.184 kJ

1 BTU = 1055.06 J

1 J = 0.239006 cal

1 kJ = 0.239006 kcal

1 J = 0.000947817 BTU

1 kWh = 3,600,000 J

1 J = 0.00000027778 kWh

1 lbf = 4.44822 N

1 lbf = 0.00444822 kN

1 N = 0.224809 lbf

1 kN = 224.809 lbf

1 kN = 1000 N

1 kN = 1000 N

1 lb/ft³ = 16.0185 kg/m³

1 lb/in³ = 27.6799 g/cm³

1 kg/m³ = 0.001 g/cm³

1 g/cm³ = 1000 kg/m³

1 kg/m³ = 0.062428 lb/ft³

1 g/cm³ = 0.0361273 lb/in³