Construction Change Order Cost Calculator
Estimate scope changes, labor, equipment, markup and added days. No signup. Enter your own figures, check the breakdown and save your inputs privately on this device.
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Editable sample valuesYour calculation
Results update as you edit. All amounts in USD unless a field states otherwise.
Confirm contract allowances, tax treatment, change-order approvals and schedule impacts. An estimate alone does not authorize work.
How to use the construction change order cost calculator
Calculate a construction change order amount with added labor, materials, subcontractors, markup and schedule impact. Start by replacing the editable example numbers with your own project, customer or business data. Your result changes immediately, making it easier to compare situations before quoting, budgeting or making operational decisions.
1. Add your real costs
Enter figures from your latest job, client brief, booking, contract or monthly operating budget. Use consistent time periods and units.
2. Review the breakdown
Don't rely only on the main number: examine the supporting costs, deductions and assumptions shown in the results panel.
3. Save for repeat visits
The Save button stores your inputs in this browser only. Return with the same device and browser profile to adjust your numbers next time.
4. Share a simple summary
Copy the calculated breakdown or choose Print / Save PDF for a print-ready copy. Verify your information before sharing it with customers.
Important considerations
Confirm contract allowances, tax treatment, change-order approvals and schedule impacts. An estimate alone does not authorize work. Use this tool for planning and transparent conversations—not as a substitute for contracts, required records, tax advice or a licensed professional where applicable.
Frequently asked questions
What goes in a construction change order?
Identify the changed scope, cost breakdown, schedule effect and required approvals.
Is markup the same as profit?
No. Markup is applied to costs; profit can differ depending on overhead and expenses.
When should the contractor get approval?
Typically before performing additional work, under the terms of the project agreement.
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