Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Construction & Bidding
Construction Change Order Impact Calculator
New margin = (revised price − revised cost) ÷ revised price; delta = new profit − old profit.
Compare original vs revised bid margin after scope/cost changes. Planning estimates only — verify measurements and local codes on site.
Inputs
10005000000
5005000000
0500000
0500000
Smart analysis
Recommendations
Tailored to your live inputs and result—guidance only, not professional advice.
- Interpret
Treat this as a planning estimate
Primary result: Revised bid = $62,000.00. Re-run with optimistic and pessimistic inputs to understand the range—not just a single point.
Scenario studio
Compare A vs B
Capture two sets of inputs on this device, then see which outcome wins. Share either scenario with a link.
Scenario A
Adjust inputs, then capture this slot.
Scenario B
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Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
Original bid
The “Original bid ($)” value used in this tool’s formula. Adjust it to see results update live.
Original cost
One-time or recurring costs that affect total money paid.
Added cost
One-time or recurring costs that affect total money paid.
Added price
The “Added price ($)” value used in this tool’s formula. Adjust it to see results update live.
- originalPrice
Original bid ($)
The “Original bid ($)” field. Default 50000; typical range 1000–5000000.
- originalCost
Original cost ($)
The “Original cost ($)” field. Default 40000; typical range 500–5000000.
- addedCost
Added cost ($)
The “Added cost ($)” field. Default 8000; typical range 0–500000.
- addedPrice
Added price ($)
The “Added price ($)” field. Default 12000; typical range 0–500000.
How this calculator works
Compare original vs revised bid margin after scope/cost changes. Planning estimates only — verify measurements and local codes on site. New margin = (revised price − revised cost) ÷ revised price; delta = new profit − old profit. Example: $50k job + $8k added cost at $12k added price → margin compression visible.
New margin = (revised price − revised cost) ÷ revised price; delta = new profit − old profit.
Example: $50k job + $8k added cost at $12k added price → margin compression visible.
When to use this Change Order Impact
Common use cases
- Compare original vs revised bid margin after scope/cost changes.
- Sanity-check with this case: $50k job + $8k added cost at $12k added price → margin compression visible.
- The relationship is: New margin = (revised price − revised cost) ÷ revised price; delta = new profit − old profit.
Localized examples
- Construction & Bidding: the example on this page uses the same formula as the widget.
What you get
- Fields: Original bid ($), Original cost ($), Added cost ($), Added price ($)
- New margin = (revised price − revised cost) ÷ revised price; delta = new profit − old profit.
- Example on the page: $50k job + $8k added cost at $12k added price → margin compression visible.
How to Calculate Change Order Impact Step-by-Step
- 1Enter Original bid ($), Original cost ($), Added cost ($), then the remaining fields. Use the values you have, not a catalog average, unless that is all you know.
- 2New margin = (revised price − revised cost) ÷ revised price; delta = new profit − old profit.
- 3Worked case: $50k job + $8k added cost at $12k added price → margin compression visible.
- 4Buy materials after you walk the job. This is a first-pass quantity, not a purchase order.
Governing formula
New margin = (revised price − revised cost) ÷ revised price; delta = new profit − old profit.
$50k job + $8k added cost at $12k added price → margin compression visible.
Example: set Original bid ($) = 50,000, Original cost ($) = 40,000, Added cost ($) = 8,000, then read the result.
Variable definitions
- originalPrice
Original bid ($)
The “Original bid ($)” field. Default 50000; typical range 1000–5000000.
- originalCost
Original cost ($)
The “Original cost ($)” field. Default 40000; typical range 500–5000000.
- addedCost
Added cost ($)
The “Added cost ($)” field. Default 8000; typical range 0–500000.
- addedPrice
Added price ($)
The “Added price ($)” field. Default 12000; typical range 0–500000.
- The takeoff (New margin = (revised price − revised cost) ÷ revised price; delta = new profit − old profit.) ignores waste, code, and what you find when you open the wall. Measure twice on site.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
New margin = (revised price − revised cost) ÷ revised price; delta = new profit − old profit.
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Reviews & Ratings
See what others think about this tool, then leave your own rating to help improve CalculioHub.
4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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