Finance category
Mortgage, loan, investing, tax, and money calculators.
Procurement Lead Time Calculator
Material shortages drive construction delays. This calculator compares promised delivery dates to schedule need and flags critical-path risks.
Schedule slack (weeks)
-4
negative = critical
Weeks after expedite
18
Recommendation
At risk — expedite or change supplier
How the math works
Schedule slack = required − promised. Positive = OK; zero/negative = critical path trouble.
Long-lead items should be on a separate procurement tracker reviewed weekly by PM. Don't wait for weekly GC meetings — suppliers need constant attention.
How to Use
- Enter order date.
- Enter promised delivery lead time (weeks).
- Enter schedule-required delivery (weeks from now).
- Read schedule slack and risk status.
Frequently Asked Questions
Typical lead times?
Rooftop HVAC units: 16-36 weeks. Windows/doors: 10-24 weeks. Electrical switchgear: 20-40 weeks. Elevators: 26-52 weeks. Plan procurement 6+ months ahead of install.
When to worry?
If promised lead > schedule-required, you're late before ordering. Change suppliers, expedite with premium, or reschedule. Critical-path impact is worst.
How to manage?
Pre-order long-lead materials with deposits. Dual-source where possible. Track biweekly with suppliers. GC should own procurement schedule alongside construction schedule.
What documentation matters here?
Written leases, move-in/move-out inspections with photographs, ledger entries showing every payment and charge, served notices with proof of service, and contemporaneous emails or texts. Courts weigh written evidence heavily; informal understandings rarely stand. Institutional operators run a monthly file audit to catch gaps before they matter. Good paper trails recover most of what's owed.
Related Calculators
More Finance Calculators
Browse all finance →AI Cost Calculator
Compare token costs across OpenAI, Anthropic, and Google AI models. Calculate monthly API spending for GPT-4o, Claude, Gemini, and more.
Tip Calculator
Calculate the perfect tip and split the bill between friends. Choose preset percentages or enter a custom tip amount.
Bill Splitter Calculator
Split an uneven restaurant bill by item, divide tax and tip proportionally, and see exactly who owes whom.
Discount Calculator
Calculate sale price, discount amount, stacked discounts, sales tax, and total savings for any markdown.
Gas Mileage Calculator
Calculate MPG or km/L, estimate trip fuel cost, and compare annual fuel expenses between two vehicles.
Sales Tax Calculator
Add sales tax to a price, reverse-calculate the pre-tax amount from a total, and estimate tax for multiple items on one receipt.
Keep exploring
Next steps in Finance
Previous calculator
Private Money Loan Calculator
Structure a private money loan from an individual investor — rate, term, secured vs unsecured, and lender yield.
Next calculator
Profit Margin Calculator
Calculate gross margin, markup, target selling price, maximum cost, and compare margins across multiple products.