XOR thanks for your reply I was correct I think it was me lol. I was doing the sum up on the bare figures present on the sheet missing out the=SQRT(SUMSQ(D2,D5)) on the calculator. I was just adding on the calculator 2000kg x 6.00m x 5.39m = A and also 5.00m x 8.00m =B Then dividing A with B However as you can see if I do this with the row on the right the figure comes out correct without putting SQRT(SUMSQ(D2,D5)) in the calculator why is this ? or am I doing something wrong as the formula should work without the equation SQRT(SUMSQ(D2,D5))