Moving on a BudgetWhat Size Moving Truck Do You Actually Need? A Spec-Checked Guide
Bedroom-count charts disagree with each other because truck sizes are not standardized. The manufacturers' own volume and payload numbers are the only sizing chart that matters.
Every truck-size guide on the internet works the same way: count your bedrooms, read the chart, book the truck. The problem is that the charts are built on a fiction — that a "16-foot truck" or a "20-foot truck" is the same vehicle everywhere. It is not. As one national moving roundup puts it, truck sizes offered by different companies share similarities, but there is no standardization, which makes comparing options frustrating. U-Haul sells its sizes as 10, 15, 17, 20, 26, and now 29 feet; Penske runs 12, 16, 22, and 26; Budget runs 12, 16, and 26; Enterprise runs 15, 16, 24, and 26. Same job, four different ladders — and the rungs do not line up.
That mismatch costs money in both directions. Book by a chart that undersizes you and moving day turns into two trips, a second rental day, or a curb full of furniture that did not fit. Book by a chart that oversizes you and you pay for air: a bigger rental than you needed, and a truck that is harder to park and drive. This guide sizes the truck the way the rental companies themselves measure it — cubic feet of volume and pounds of payload, taken from their published specifications — then adds the two checks the bedroom charts skip: weight, and distance.
The specs, verified: volume is only half the number
Every rental truck carries two limits, and you have to clear both. Volume is how much space the box holds. Payload (listed as "max load") is how much weight it can legally and safely carry. A load of pillows fails on volume long before weight; a load of books, tools, and appliances can fail on weight while the box still looks half empty. Here are the published figures for the sizes most home moves actually use, checked against the companies' own pages on October 13, 2026:
| Truck | Volume | Max load (payload) | Company's own positioning |
|---|---|---|---|
| U-Haul 15 ft | 764 cu ft | 6,385 lbs | 1-bedroom home to 2-bedroom apartment |
| Penske 16 ft | 800 cu ft | 4,300 lbs | Up to 120 sq ft of floor space |
| U-Haul 20 ft | 1,016 cu ft | 5,700 lbs | 2-bedroom home to 3-bedroom apartment |
| U-Haul 26 ft | 1,682 cu ft | 12,859 lbs | Large 3–5 bedroom homes |
| Penske 26 ft class | up to 1,700 cu ft | up to 10,000 lbs | Largest loads in its fleet |
Read the middle rows carefully, because they break the bedroom-chart logic completely. U-Haul's 20-foot truck holds about a third more volume than its 15-foot — but its published max load is lower: 5,700 lbs against the 15-foot's 6,385 lbs. The longer truck is built on the same 14,500 lb gross vehicle weight rating and weighs more empty (8,800 lbs against 8,115 lbs), so the extra space comes out of the weight budget. If your move is heavy rather than bulky, the "bigger" truck can actually carry less. No bedroom chart will ever tell you that.
Two honesty notes before you plan around any of these numbers. U-Haul states that all of its rental truck measurements are approximate and the equipment you receive may vary by production model. Penske says the same thing in its own words: its listed specifications come from its most commonly rented fleet and will vary by make, model, and year. Treat published specs as planning numbers with a margin, not as guarantees — which is exactly what the margin in step 1 is for.
Step 1: estimate your volume
- Walk every space, including the forgotten ones. List the furniture and box count room by room — then do the garage, attic, basement, and shed. Storage calculators warn that these are the most commonly forgotten spaces, and a full two-car garage alone can add up to 1,000 cubic feet to a load.
- Apply the per-room rule as a cross-check. A widely used planning rule is 100–150 cubic feet of truck space per fully furnished room. A six-room home at the midpoint lands near 750 cubic feet — but if your walk-through list and the rule disagree, trust the list; the rule cannot see your piano, your workshop, or your book collection.
- Add a 10–15% margin. Published guidance on sizing recommends leaving 10–15% spare space for miscalculations and less-than-perfect packing. Real loads never stack like the diagram.
- Match the total to the spec table, not a bedroom chart. If your margined total sits within about 10% of a truck's published volume, treat that truck as too small — see the distance rule below.
Step 2: estimate your weight — the check most guides skip
Volume gets all the attention because it is easy to picture. Payload is the limit that sneaks up on people moving dense households: books, vinyl, tools, gym weights, appliances, and a garage full of hardware are all small and heavy. The procedure takes twenty minutes and a bathroom scale:
- Weigh one packed book box and one typical packed box on a bathroom scale. Multiply by your counts in each category. This gives you a real box total instead of a guess.
- List the heavy singles separately — appliances, safes, tool chests, weight sets, aquariums, dense wood furniture — and be honest about them. These are the items that eat payload while taking almost no floor space.
- Compare against the truck's max load, not its size name. Remember the inversion in the table: for a heavy load, the U-Haul 15 ft (6,385 lbs) out-carries the 20 ft (5,700 lbs), and the 26 ft (12,859 lbs) is in a different league entirely from everything below it. If your weight estimate crowds the payload of the truck your volume picked, the weight wins — move up, or plan to run the heaviest items in your own vehicle across a couple of trips.
Tip: Check the physical fit, not just the totals. U-Haul's 26 ft has a door opening of 7'9" by 6'10" and a clearance height of 12 feet. A tall armoire that fits the volume math still has to pass through the door — and a 12-foot-tall truck still has to clear your parking garage, carport, or low branches at the new place.
Step 3: one size up, a second trip, or a trailer?
When your estimate lands between sizes, decide with distance, not hope:
- Short local move, small overage: a smaller truck and a second trip can be the cheap answer — the rental is one day either way, and the extra distance is short. This only works if your rental terms and your day actually allow the second run; a same-day return deadline kills it.
- Long or one-way move: size up. A second trip is not a trip across town, it is the whole drive twice — or impossible if you have already handed back the keys at the other end. Before booking the smaller truck, compare the step-up price against the full cost of driving the route twice — fuel, distance charges, and your day.
- Volume over, weight fine, one awkward overflow: U-Haul itself notes that a trailer can be attached to its 26 ft for extra cargo room, and trailers are an option behind smaller trucks too. Overflow that is bulky but light — mattresses, patio furniture, bikes — is exactly what a trailer absorbs well. Confirm your truck's towing capacity and your own comfort towing before choosing this route.
- Weight over, volume fine: none of the above tricks help except the payload table. Re-check step 2 and pick by max load.
One more fleet note for comparison shoppers: if a quote seems to come from Ryder, check what you are actually booking — Ryder trucks are not available for personal moves, so a "deal" on one is a misunderstanding waiting to happen.
What success looks like
You have sized it right when the truck is loaded in one trip with the door closing on a load that fills roughly 85–90% of the box — full enough that you did not pay for a size you never needed, with enough slack that the last awkward items (the bike, the floor lamp, the box you forgot in the hall closet) still fit. You know your estimated volume and your estimated weight, and both sit under the published limits of the truck you booked, with the margin intact. If either number only fits by optimistic rounding, that is the signal to move up a size before moving day finds out for you. For the cost side of the decision — what the truck, mileage, and fuel add up to against hiring movers — run your numbers through the DIY vs movers cost framework before you book.
FAQ
What size truck do I need for a 3-bedroom house?
By the manufacturers' own positioning, that is 20 ft territory at U-Haul (marketed for 2-bedroom homes to 3-bedroom apartments) or the 26 ft for a large, fully furnished 3-bedroom. Run the volume estimate in step 1: a furnished 3-bedroom with a garage routinely lands past the 20 ft's 1,016 cubic feet once the 10–15% margin is added.
Can a smaller truck save me money?
Yes — if it genuinely fits and your move is local enough that a second trip is realistic. It saves nothing if the second trip means a second rental day, doubled distance charges, or a long one-way route driven twice. The step-3 distance rule is the whole decision.
Why does the 20 ft U-Haul carry less weight than the 15 ft?
Both trucks share a 14,500 lb maximum gross vehicle weight, and the 20 ft weighs about 685 lbs more empty. Payload is what remains after the truck itself, so the longer box leaves less room in the weight budget. It is the clearest proof that "bigger" is two different numbers, not one.