Calculating Seed and Turf Quantities

1. METRES

Area measurements: 18.750m x 22.430m
Simply multiply the two figures together using a calculator and the result is 420 square metres (m2)

If you intended sowing rate is 50grammes/m2 then multiply the area (420m2) by the sowing rate (0.050). The result is 21kgs of seed.

Alternatively, if you have the equipment to sow more accurately then the reduced rate (of 35grammes/m2) can be utilized. As before multiply the area (420m2) , but this time by 0.035. The result is 14.7kgs of seed.

Wild flower/grass meadow mixtures have much lower sowing rates, i.e. around 5gms/m2.
The calculation is 420m2 x 0.005
The result is 2.1kg of seed

With turf , it is even simpler as each roll of turf covers an area of 1m2, so the calculation is 420 x 1 = 420m2 of turf.

2. IMPERIAL

Taking the same area as above but measured in feet and inches we need to do a few more calculations initially.
a) To convert 61’ – 6” to metres multiply 61.5 x 0.305 and the result is 18.755 metres. You will notice that we needed to convert the 61 feet and 6 inches into a metric equivalent , i.e. 61.5 feet

To convert the other dimension 73’-6” we do exactly the same again, i.e. 73.5 x 0.305  = 22.420 metres

This gives us an area of 420m2

Return to the METRIC workings out and proceed as though you had started out in metres.