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Storage Unit Size Calculator

Build an inventory of furniture, appliances, boxes and outdoor gear, pick a packing efficiency and get the right unit on the 5×5 to 10×30 ladder, with metric equivalents.

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Storage Unit Size Calculator works straight from this page — free, instant, nothing to install. It sits under Buying in our catalogue, alongside Home Affordability Calculator and Home Equity Calculator.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What does Storage Unit Size Calculator do?

Build an inventory of furniture, appliances, boxes and outdoor gear, pick a packing efficiency and get the right unit on the 5×5 to 10×30 ladder, with metric equivalents.

When would I actually use this?

Before making an offer: what the bank will lend, what the purchase costs on top of the price, and how much deposit closes the gap.

What is the most common mistake?

Budgeting for the price and forgetting the acquisition costs. Notary fees, transfer duty and registration add between 2% and 15% depending on the country — enough to sink an offer.

Is there a tool for the next step?

Home Equity Calculator is the closest one after this: Work out the equity in your home from its value and your mortgage balance, with LTV, borrowable amount and a future projection.

What else is worth having open alongside it?

Housing Appreciation Calculator and Interest-Only Mortgage Calculator — they come up in the same task often enough to be worth a second tab.

Where do the figures come from?

Fee scales and duty rates are published per country and per region, and they change with each finance act. Lending limits also depend on the bank's own policy, not only on the regulator's debt-to-income cap.

Further reading

All guides →
How-toHow Much Storage Space Do You Need?You are sold floor area and you use volume. A 10 by 10 unit is 800 cubic feet gross but 595 usable, and a one-bedroom home itemised piece by piece comes to 635.75 packed — so the unit advertised for it only just holds it.ExplainerParking Ratios and the Arithmetic Behind a Car ParkA ratio of 4 spaces per 1,000 sq ft puts 200 spaces on a 50,000 sq ft office — and 51,000 sq ft of asphalt, more land than the building itself. The ratio is a policy choice, not a measurement.GuideSplitting Rent Between Rooms That Are Not the SameEqual thirds of $2,400 charge the same for 180 square feet and for 100. Floor area is better and still leaves someone envious. The sealed-bid envy-free split gives $850, $700 and $850 — and nobody wants to swap.How-toHow Many Moving Boxes You Need — and Why the Mix Beats the TotalA two-bedroom home comes out at 56 boxes: 14 small, 21 medium, 12 large, 4 wardrobe, 5 dish. The total is the least useful number on the page — here is why the split matters, and what the count leaves out.GuideWhat a Move Actually Costs — and What the Cheap Quote Left OutA local two-bedroom move estimates at $954–$1,347. Four boxes ticked on a three-bedroom move — peak week, full packing, two flights, full-value cover — take it from $1,730 to $3,162. Quotes differ on exclusions, not on price.GuideBuying Together Without Marrying: What the Split on the Deed Commits You ToThe percentages written into the deed decide who owns what for as long as the property exists — not who paid the deposit, not who pays the mortgage, not who does the renovation. In France, Spain and Italy the default is the same undivided co-ownership, and it comes with a right that surprises couples: either of you can force a sale.