Lead Time Calculator for Interior Designers
Interior designers juggle dozens of vendor lead times at once — custom sofas, lighting, tile, and window treatments each arrive on their own schedule. Enter your order date and lead time to find the estimated delivery date, or flip it: enter your installation date and lead time to find the last date you can place the order.
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Frequently Asked Questions
How do I use this to find a delivery date?
Use "Order date → Delivery" mode. Enter the date you're placing the order (it defaults to today) and the vendor's lead time in weeks or days. The calculator shows the estimated delivery date.
How do I work backward from my installation date?
Switch to "Install date → Order by" mode. Enter your installation date and the vendor's lead time. The result shows the last date you can place the order and still receive the item before install day.
How far in advance should I order custom furniture?
Custom upholstered pieces typically carry 8–16 week lead times; case goods run 6–12 weeks; lighting and accessories often ship in 2–6 weeks. Always add a 1–2 week buffer before your installation date for freight delays and damage inspection.
What is the difference between weeks and days for lead times?
Vendors usually quote lead times in weeks, but freight and inspection windows are easier to plan in days. This tool supports both — switch the unit dropdown to whichever matches how your vendor communicates.
Can I use this for multiple vendors on the same project?
Yes — run a separate calculation for each vendor and note the results. This lets you identify which item has the longest lead time and is on the critical path for your installation date.