How the PEC / FIDIC Price Escalation works
PEC / FIDIC adjustment factor Pn = A + Σ[bᵢ × (Ln ÷ Lo)]. Escalation = IPC × Σ[bᵢ × (Ln ÷ Lo − 1)], where A is the fixed non-adjustable portion and A + Σbᵢ must equal 100%.
How to use this calculator
- Sign up free and verify your email to unlock the calculator.
- Choose Metric (m, mm, m³, kg) or Imperial (ft, in, cft, lb) units.
- Enter the base rate, base index, current index, escalable portion.
- Results update instantly — read the quantities in the Results panel.
- Add a wastage allowance and confirm against your drawings and specifications before ordering.
Typical uses
Calculating PEC and FIDIC Sub-Clause 13.8 price adjustment on interim payment certificates using cement, steel, diesel, labour, bitumen or custom indices.
Assumptions & limitations
Results are planning estimates based on standard assumptions for estimating & cost work. They do not replace structural design, site measurement or project specifications. Material densities, wastage and mix proportions vary by region and supplier.
Frequently asked questions
- How does the PEC / FIDIC Price Escalation work?
- PEC / FIDIC adjustment factor Pn = A + Σ[bᵢ × (Ln ÷ Lo)]. Escalation = IPC × Σ[bᵢ × (Ln ÷ Lo − 1)], where A is the fixed non-adjustable portion and A + Σbᵢ must equal 100%.
- Can I use the PEC / FIDIC Price Escalation in feet and inches?
- Yes. Switch to Imperial and enter feet, inches, square feet or pounds — the calculator converts automatically and shows results in imperial units.
- When should I use the PEC / FIDIC Price Escalation?
- Calculating PEC and FIDIC Sub-Clause 13.8 price adjustment on interim payment certificates using cement, steel, diesel, labour, bitumen or custom indices.
- Is this construction calculator free?
- Yes. All CM PRO construction calculators are free — you only need to sign up and verify your email.
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