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What size storage unit do I need, and what will it cost?

Estimates the storage unit size a customer needs in square feet and what it costs per month.

How to build this in Numio

How it is wired

Which cell does what, and which worksheets the model reads. These are the assignments you recreate when you import the file.

Cell assignments for the Storage unit estimate template
CellRoleNote
B1InputHousehold size, entered as its estimated contents volume in cubic feet.
B2InputCount of bulky items that do not stack; each adds 35 cu ft.
B3InputLength of the rental in months; drives the term total only.
B4InputClimate control toggle. 1 = yes, 0 = no.
B6ResultTotal volume: household volume plus 35 cu ft per extra large item.
B7ResultVolume divided by a 7 ft usable stacking height to get floor area.
B8ResultFloor area increased by 15% for an access aisle.
B9LookupUnitSizes band lookup: rounds the required area up to the next standard unit size. Shown as a result.
B10LookupRates lookup: base monthly rate for that unit size.
B11Result22% of the base rate when climate control is on, zero when off.
B12ResultPrimary result. Base rate plus climate control surcharge.
B13ResultFixed one-time admin fee of $29.
B14ResultMonthly cost times months, plus the admin fee.

Reference worksheets

  • UnitSizesTwo columns. A = minimum floor area required in sq ft (0, 25, 50, 75, 100, 150, 200, 250, 300), B = the standard unit size rented at that point (25, 50, 75, 100, 150, 200, 250, 300, 400). Sorted ascending so VLOOKUP with TRUE rounds the requirement up to the next unit the facility stocks.
  • RatesTwo columns. A = unit size in sq ft (25, 50, 75, 100, 150, 200, 250, 300, 400), B = base monthly rate before climate control (52, 82, 105, 138, 178, 215, 255, 295, 390). Replace column B with the facility's own price list.

Functions used

ROUNDVLOOKUP

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Change the numbers to yours, then paste it into your own page. It runs in the visitor’s browser and the answers are theirs, not a screenshot of yours.

Embed Storage unit estimate

This template carries example rates, not yours. Paste it as-is and you are quoting our numbers to your customers, and enquiries reach our workspace rather than yours. Copy it into Numio first, change the rates, and publish your own — you get your embed code at the end of that.

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Embed code
<div style="position:relative;overflow:hidden;height:640px;">
  <iframe frameborder="0" style="width:100%;height:100%;" src="https://calc.numioapp.com/calculator/6aa0a722e52bf083b27ab3eb"></iframe>
</div>

Set the height to suit your page — the iframe fills whatever container you give it.

Build it in Numio
  1. 1

    Copy it into Numio

    Start from this model rather than a blank sheet. The inputs, the results and any lookup worksheets come with it.

  2. 2

    Put your own rates in

    The prices here are examples. Change them in the Formula view and the calculator follows — no rewiring.

  3. 3

    Publish and paste it in

    Publishing gives you an iframe snippet. Drop it into your own page and enquiries land in your workspace.

Storage unit estimate FAQ

The contents are converted to cubic feet, divided by a 7 ft stacking height to get floor area, and increased by 15% so there is room to walk in and reach the back. That number is rounded up to the next standard unit size the facility rents.

Anything that does not stack: a fridge, washer, dryer, sofa, mattress set, motorcycle, bike or garden equipment. Each is counted at 35 cubic feet on top of the household volume.

It is usually recommended for wood furniture, electronics, instruments, artwork, leather, photographs and documents, or for any storage lasting more than a few months in a humid or freezing climate. The estimate adds 22% to the monthly rate when it is selected.

That is above the largest single unit most facilities offer, the 10x30 at 300 sq ft. In practice it is rented as two units, commonly two 10x20s, and the quote should be confirmed with the facility.

The term total is the monthly rate multiplied by the number of months, plus a one-time $29 admin fee. It does not include insurance, a lock, or any promotional first-month discount.

It is an estimate based on national average rates. Local rates vary by roughly plus or minus 40% depending on the area and current occupancy, so a facility using this calculator should load its own price list into the rate table.

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