Free tool
UK construction buyers convert your price into marks with a published formula. Enter your figure, the prices you expect from competitors and the price weighting to see what a pound is worth in mark terms — and what quality score you need to stay ahead. Nothing is stored.
Quality weighting is 60%.
Expected competitor prices (£)
Estimates are fine — the point is to see the shape of the curve, not to predict the field.
83.0 / 100 total marks
Price marks 38.0 of 40 · Quality marks 45.0 of 60
You score 95.0% of the available price marks. Lowest price in the field £950,000 · mean £1,000,000.
The useful output is not the total — it is the slope. Under a lowest-price formula with a 40% price weighting, being 5% above the lowest bid costs roughly two marks. Under a two-marks-per-percent deduction it costs ten. The same commercial decision has a very different consequence, which is why the formula has to be read before the price is set.
Then compare that slope against quality. If one band on a heavily weighted quality criterion is worth more marks than the price gap you are worried about, the effort belongs in the answer, not in the margin.
Model the formula printed in your ITT, not the one you saw last time. Where a tender caps price marks, applies a threshold or evaluates a whole-life cost rather than a tender sum, treat this calculator as an approximation and confirm the arithmetic against the document.
Use the one printed in the ITT. UK buyers most often use lowest price divided by your price, a mean-price comparison, or a percentage-difference deduction. If the ITT does not state a formula, ask a clarification question rather than assuming.
No. It shows how marks move with price under the stated formula so you can see the value of a pound in mark terms. Your bid figure remains a commercial decision based on cost, risk and capacity.
Because the formula and the price weighting differ. Under lowest-price-over-your-price, being ten per cent above the lowest bid costs far fewer marks than under a formula that deducts a fixed number of marks per percentage point.
No. The calculator runs entirely in your browser. Nothing is sent to us, saved or shared.