General Conversion Factors

1 acre (ac)
0.4047 hectares

1 hectare (ha)
2.471 acres
10000 square metres
0.00386 square miles

1 square mile
640 acres
258.99 hectares
2.59 square kilometres

1 square kilometre
0.3861 square miles
247.1 acres
100 hectares

1 township
36 square miles

1 cubic foot (cu ft)
0.028 cubic metres

1 centare (ca)
1550.003 square inches
1 square metre
1.196 square yards

1 millimetre
0.039 inches

1 cenimetre
0.394 inches

1 metre
39.370 inches
1.094 yards

1 kilometre
0.621 miles
3280 feet
1000 metres

1 inch
2.54 centimetres

1 foot
0.305 metres

1 yard
91.44 centimetres
0.9144 metres

1 mile
1609.3 metres
1.6093 kilometres

1 litre
0.220 gallons
0.880 quarts
1000 cubic centimetres
61.025 cubic inches

1 ounce (troy)
31.103 grams

1 ounce (avdp)
28.3495 grams

1 kilogram (kg)
32.151 ounces (troy)
35.274 ounces (avdp)
2.205 pounds

1 metric tonne
0.984 tons (long)
1.102 tons (short)
2204.622 pounds
1000 kilograms

1 long ton (l t)
1.016 tonnes
2240 pounds

1 short ton (s t)
0.9071 tonnes
2000 pounds

Ore Grade Conversion

1 troy oz./short ton
34.2857 grams/tonne

1 gram/tonne
0.0292 oz./ton