ISKRIT / Construction site / Volume reconciliation
Construction site
Reconciling completed work quantities against the design schedule
Quantities claimed by the contractor are compared against the design schedule line by line: it finds quantities claimed above the design, the balance left to complete, and the percentage of progress, and flags duplicated lines and work that is not in the design at all. When a unit price is supplied, it values the excess in money terms.
Data current as of 2026-09-26
Standards
Lines are matched by unit rate code, or by name plus unit of measure when no code is given. Used in construction control when verifying quantities submitted for payment.
Input
Schedule lines: code, description, unit, design quantity, claimed quantity, unit price. The contract price is optional. Entered manually or uploaded from Excel using the template.
Output
Balance, quantity above the design, progress percentage, a status per line, a summary of findings, the schedule checked against the contract price, and XLSX export.
What it does
- Remaining volume, overrun, percent complete and a status per line
- Load the whole schedule from Excel with no line cap, export the check to XLSX
- Calculations are stored on the server and reopen next time, company letterhead with signatures
Price
Free in full, no sign-up and no payment.
Open the calculator →Questions
How are duplicates found?
By unit rate code, or by the name and unit of measure pair when the code is blank. Matching lines are flagged as double billing.
What counts as work outside the design?
A line with a claimed quantity where the design quantity is zero. Such lines get their own status.
Is a unit price required?
No, quantities reconcile without prices. A price is only needed to value the excess in money terms.
What is the contract price for?
It checks the schedule itself. The design items must total the contract price to the penny; when they do not, there is no point arguing about the claimed quantities, the baseline has drifted.