Work out bill of quantities total instantly with clear inputs, formula shown and shareable results.
A bill of quantities totals the priced measured work section by section, then adds a contingency for undefined risk. Looking at which section dominates the total shows where estimating error hurts most, and where value engineering effort should be concentrated.
Bill total
Total = sum of section values x (1 + contingency percentage)
Total = sum of section values x (1 + contingency percentage). A bill of quantities totals the priced measured work section by section, then adds a contingency for undefined risk.
It reflects design maturity: 10-15 percent at concept, 5-10 percent at detailed design and 2-5 percent on a fully documented tender. Carrying a large contingency on a well defined job just inflates the budget.
This calculator takes 4 inputs: Substructure and civil works, Superstructure and finishes, Services and external works, Contingency. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.