This is just a rough calculator page…
CONVERSION
Metric Tonnes  A unit of weight equal to 1,000 kilograms, or 2,204.6 pounds.
UK Ton 2240 lbs =35 cu ft of seawater
US Ton 2000 lbs
1m 3.281 ft Sail Area Lengths Weights
1 sq m 10.764 sq feet 83.12 sq m 1.25 m 9720 kgs
1kg 2.2046 lbs 894.70 sq ft 4.10 ft ###### lbs