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Metric-Imperial Dimensions

These are not accurate conversions - they are simple "near as dammit" figures that are intended to aid understanding, not to be scientifically accurate.

For a fuller examination of metric-imperial conversion see...
Wikipedia
UK Statutory Instrument


Linear Area Volume Mass

 
Linear measurement:
For rough'n'ready calculation, 1 inch is approximately 25mm or 2½cm
Metric Imperial
 
3mm 1/8"  
6mm ¼"  
12mm ½"  
18mm ¾"  
 
25mm 1"  
50mm 2"  
75mm 3"  
100mm 4"  
125mm 5"  
150mm 6"  
225mm 9"  
300mm 12" 1ft (actually 305mm)
450mm 18"  
600mm 24" 2ft (actually 610mm)
900mm 36" 3ft (actually 915mm)
 
1000mm
1 metre
39½"  
 
1.2m 4ft (3ft 11")  
3m 10ft (9ft 10")  
4.5m 15ft (14ft 9")  
6m 20ft (19ft 8")  
10m 33ft (32ft 10") 11 yards
100m 328ft (328ft 1") 109 yards

 
Area measurement:
Metric Imperial
 
1m² 1.2 sq yd 10.8 sq ft
 
0.84m² 1 sq yd  
0.093m² 1 sq ft  

 
Volume measurement:
Metric Imperial
 
1m³ 1.3 cu yd 35.3 cu ft
1 litre 1.8 pints 2.1 US pints
4.5 litres 1 Gallon  
3.8 litres 1 US Gallon  

 
Mass measurement:
Metric Imperial
 
  100g 4 oz  
1kg 1000g 2.2 lbs  
1000kg 1 Tonne 2240 lbs  
 
  25kg 55 lb ½ cwt
  40kg 88 lb  
  50kg 110 lb 1 cwt
 
  907kg 1 US Ton  

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