Storage Space Calculator Formula

Understand the math behind the storage space calculator. Each variable explained with a worked example.

Use the Storage Space Calculator

Formulas Used

Storage Space Needed

storage_sqft = sqft_needed

Estimated Monthly Rent

monthly_cost = sqft_needed * monthly_rate

Annual Cost

annual_cost = sqft_needed * monthly_rate * 12

Variables

VariableDescriptionDefault
num_roomsNumber of Rooms3
densityFullness Level150
monthly_rateRate Per Sq Ft / Month(USD)1.25
sqft_neededDerived value= num_rooms * densitycalculated

How It Works

How to Estimate Storage Space

A rough rule of thumb is 100-200 square feet of storage per room, depending on furniture density.

Guidelines

  • Lightly furnished: ~100 sq ft per room
  • Average: ~150 sq ft per room
  • Heavily furnished: ~200 sq ft per room

    • Storage units stack items vertically, so floor area estimates assume vertical packing.

    Worked Example

    3 average-furnished rooms at $1.25/sq ft per month.

    num_rooms = 3density = 150monthly_rate = 1.25
    1. 01Space needed = 3 x 150 = 450 sq ft
    2. 02Monthly rent = 450 x $1.25 = $562.50
    3. 03Annual cost = $562.50 x 12 = $6,750

    Ready to run the numbers?

    Open Storage Space Calculator