PangPang Tools100 m to 120 m at KRW 8,500/m
+KRW 170,000Old KRW 850,000 versus new KRW 1,020,000.
Construction & Electrical
Construction Quantity Change Calculator
About this tool
For a quick on-site check, enter original quantity, changed quantity and contract unit price. Enable the revised unit price only when needed. Use spreadsheets for full change orders.
Construction quotation & BOQ
Choose a task. Inputs stay in this page only.
MAKE IT SIMPLE
Result
Worked examples
0 to 5 pieces at KRW 12,000
+KRW 60,000New items use zero previous quantity; verify contract price separately.
Questions & answers
Do I upload a spreadsheet?
No, enter one work item. Keep your spreadsheet for multi-item and contractual change estimates.
Are indirect costs or VAT included?
No, this calculates quantity × unit price differences only.
MAKE IT SIMPLE
Result
Worked examples
30 conduits at 1,200 KRW each, monetary markup 5%; 8 couplers at 300 KRW; tax 10%
Subtotal 40,200 KRW; tax 4,020 KRW; total 44,220 KRWConduits cost 30×1,200×1.05 = 37,800 KRW; couplers cost 2,400 KRW. The markup does not change quantities.
CONVERT YOUR FILES
Result
Worked examples
Conduit 30m × KRW 1,200; coupler 8 × KRW 300; VAT 10%
KRW 42,240Subtotal KRW 38,400 plus VAT KRW 3,840, shown in an itemized A4 table.
Questions & answers
Does a long quotation span pages?
Yes. Long item tables are broken across A4 pages with repeated column headers and page numbering.
Can I include business registration details?
Yes, open the supplier detail section and enter registration, representative, contact and address.
Is it a tax invoice?
No, the generated PDF is a commercial quotation, not a tax invoice.
MAKE IT SIMPLE
Result
Worked examples
Materials 100m KRW, labor 40m KRW, direct expenses 15m KRW
Editable rates yield a cost sheetEach extra cost is itemized; materials are excluded from the profit base.
Questions & answers
Are line-item materials required?
No. Enter three direct cost amounts and applicable rates.
Are current statutory rates loaded?
No. Verify the correct rates for the contract and project. Safety and environment charges are simplified examples.