Published
A move combines an inventory problem, a space problem and a budget problem. Work through them separately: list what is being packed, estimate external packed dimensions, allow for loading gaps, and price services using your own quotes. A single room count cannot capture every household.
The moving tools make assumptions visible rather than choosing a vehicle or storage unit for you. Box assumptions are editable, capacity bands are illustrative and loading efficiency is your input. Keep a written inventory so that the numbers can be checked against actual items and provider specifications.
Build box counts from your rooms
For each box size, the tool sums room count × assumed boxes per room, applies your extra allowance, and rounds that size upward. The total is the sum of the rounded small, medium and large counts.
These assumptions are not surveyed household averages. Change them for books, kitchenware, bulky textiles and items traveling unpacked. Box size names do not guarantee dimensions or weight ratings; use the actual supplier’s boxes and avoid assigning heavy contents solely by available volume.
Worked example
Assume two bedrooms at 4 small/6 medium/2 large boxes each, one kitchen at 8/4/2 and one other room at 2/4/2. Add 10% extra.
Base small/medium/large totals are 18/20/8. Multiplying each by 1.10 gives 19.8/22/8.8; rounding each size upward gives 20/22/9.
20 small + 22 medium + 9 large = 51 boxes.
Separate item volume from storage floor area
The storage tool sums external length × width × height × quantity. It divides by packing efficiency as a fraction to allow for gaps. It then divides required volume by usable stacking height for a separate floor-area approximation.
This assumes a uniform usable height, not an actual layout. Nonstackable items, access aisles, doors and irregular shapes may require more space. A calculated m² figure does not guarantee that the largest item can enter or that everything can be stacked safely.
Worked example
Two packed items each measure 1 m by 1 m by 1 m. Assume 80% packing efficiency and 2 m usable stacking height.
Item volume is 2 m³. Required volume is 2 ÷ 0.80 = 2.5 m³. Approximate floor area is 2.5 ÷ 2.
2.5 m³ required volume; 1.25 m² volume-based floor-area estimate.
Allow loading gaps once, then check dimensions
Truck capacity is estimated as geometric cargo volume divided by loading efficiency. Enter volume before loading gaps. If you already adjusted a volume for gaps in another tool, do not apply the same allowance again without intending to reserve more space.
The displayed capacity bands are hypothetical examples, not a current rental fleet or a booking recommendation. Volume says nothing about payload, axle loading or whether a long item fits through the door. Compare actual interior dimensions, access and weight limits with the provider.
Worked example
Start with 10 m³ of cargo before loading gaps and an illustrative 80% loading efficiency.
Required nominal capacity = 10 ÷ 0.80. Dividing by efficiency reserves space; adding 20% to cargo volume is a different calculation.
12.5 m³ required nominal cargo capacity.
Round supplies after accounting for spare boxes
The supplies tool first adds the spare-box percentage and rounds the resulting box count up. It multiplies that adjusted count by tape length and protective-material area per box, then rounds rolls and packs upward using their stated capacities.
Measure tape as length and protective material as area. The per-box assumptions are yours to choose, not product guarantees. Unused material, fragile-item wrapping and furniture protection can differ from a simple per-box allowance.
Worked example
Use 40 boxes with 10% spare, 2 m tape per adjusted box and 50 m tape rolls. Assume 0.5 m² protective material per box and 10 m² packs.
Adjusted boxes are 44. Tape is 44 × 2 = 88 m, requiring 2 rolls. Protection is 44 × 0.5 = 22 m², requiring 3 packs.
44 boxes; 2 tape rolls and 3 protective-material packs.
Keep quoted costs and contingency separate
The budget sums the expenses you enter and adds a contingency percentage of that subtotal. It does not retrieve local mover prices or decide which costs apply. Use consistent currency and check whether your quotes already include fuel, labor, access charges or supplies.
Contingency is an extra planning amount, not a forecast of the final invoice. Avoid counting a bundled service twice. Deposits and refundable amounts may need a separate cash-flow note because the calculator simply totals entered expenses.
Worked example
Enter hypothetical expenses of 1,200 for a moving service, 200 for supplies and 100 for another charge, with 10% contingency.
Subtotal = 1,200 + 200 + 100 = 1,500. Contingency = 1,500 × 0.10 = 150. Add it to the subtotal.
1,500.00 subtotal + 150.00 contingency = 1,650.00 currency units.
Common mistakes
- Using a storage floor-area estimate as proof of a workable layout.
- Applying loading gaps twice when passing a result between tools.
- Confusing vehicle cargo volume with its weight limit.
- Treating example box assumptions, supply usage or capacity bands as supplier specifications.
Before you act
- Inventory and measure the largest, heaviest and nonstackable items separately.
- Check doors, interior dimensions, safe stacking, provider restrictions and payload.
- Reconcile supplies and service quotes with the budget so bundled charges are counted once.
Read each calculator’s formula and limitations alongside this guide. For significant or safety-critical decisions, verify the inputs and seek appropriate professional advice.
Read the calculation disclaimer