Boat Trailer Weight Calculator
US & CanadaThe brochure weight is only the start. A 1,800 lb boat with its engine, a 25 gallon tank, gear and the trailer weighs about 3,352 lb on the road. Put in your own numbers below.
Your boat and trailer
Result
0
How the towed weight adds up
Gasoline at 0.73 kg/L and diesel at 0.84 kg/L, Measurement Canada's standard densities. Water at 8.34 lb per US gallon (USGS). Tongue weight bands are manufacturer guidance, not law.
How much does a boat weigh to tow?
Total towed weight = boat (dry) + engine + fuel + water + gear + trailer (empty)
The builder's dry weight is the number on the brochure, and it is the smallest number your boat will ever weigh. Boston Whaler states it plainly: its Boston Whaler 170 Montauk is 1,700 lb (771 kg) "dry, no engine" and 2,254 lb (1,022 kg) with the standard engine, fuel and water. That is 554 lb before a single cooler or the trailer.
The calculator's example works it through: 1,800 lb of boat, 400 lb of engine, 25 gallons of gasoline (152 lb), 200 lb of gear and an 800 lb trailer come to 3,352 lb (1,521 kg). On a trailer rated 4,000 lb GVWR that leaves 648 lb spare.
- Engine: most builders weigh the hull without it. Read the engine's own spec sheet; Boston Whaler lists a maximum engine weight of 410 lb for the 170 Montauk.
- Fuel: about 6.09 lb per US gallon of gasoline. More on that below.
- Water: 8.34 lb per US gallon. Drain livewells and ballast before the road if you can.
- Gear: batteries, anchors, coolers, life jackets, skis, the cover. It adds up faster than people expect.
- Trailer: from 210 lb for a jet ski trailer to 2,000 lb for a big tandem.
What real boats weigh, from the builders' spec sheets
Each row is read off the builder's own page on 2026-10-24, with the weight labelled the way the builder labels it. Builders do not measure the same thing: some include the engine, some include the trailer, some do not say. The last column adds a full tank of gasoline at 6.09 lb per gallon, our arithmetic, not the builder's.
| Boat | Published weight | Also published | Full tank of gasoline |
|---|---|---|---|
| Bass Tracker Classic XL Aluminum fishing boat, 16 ft 8 in | 780 lb (354 kg) Average dry weight | 1,705 lb (773 kg) Average package weight (boat, motor and trailer) | 37 lb (17 kg) 6 gal (23 L) |
| Boston Whaler 170 Montauk Center console, 17 ft 4 in | 1,700 lb (771 kg) Weight (dry, no engine) | 2,254 lb (1,022 kg) Weight with standard engine, fuel and water | 152 lb (69 kg) 25 gal (95 L) |
| Sun Tracker Party Barge 20 DLX Pontoon, 21 ft 11 in | 2,080 lb (943 kg) Average dry weight | 3,745 lb (1,699 kg) Average package weight (contents not stated) | 196 lb (89 kg) 32.1 gal (122 L) |
| MasterCraft XT22 Wake boat (inboard), 22 ft 4 in | 5,485 lb (2,488 kg) Boat weight | Ballast tanks hold 3,500 lb. | 481 lb (218 kg) 79 gal (299 L) |
| Sea-Doo Spark for 2 (60 hp) Personal watercraft (jet ski), 111 in | 437 lb (198 kg) Dry weight | Not published | 48 lb (22 kg) 7.9 gal (30 L) |
| Sea-Doo Spark for 3 (90 hp) Personal watercraft (jet ski), 120.6 in | 452 lb (205 kg) Dry weight | Not published | 48 lb (22 kg) 7.9 gal (30 L) |
| Hobie 16 Sailboat (catamaran), 16 ft 7 in | 320 lb (145 kg) Weight | Not published | No tank |
MasterCraft also lists 3,500 lb of ballast for the XT22. Drain it before the road: Boatmate warns that adding ballast while the boat is on the trailer can take the trailer over its GVWR. Tracker sells the Classic XL as a boat, motor and trailer package, which is why its package weight includes the trailer.
How much does a boat weigh with a trailer?
The trailer is easy to forget, and it is not light. Two makers' full published tables, every row, with weight, carrying capacity and GVWR:
| Model | For boats | Trailer weight | Carrying capacity | GVWR |
|---|---|---|---|---|
| V-4200 | 20 to 21 ft | 900 lb 408 kg | 4,200 lb 1,905 kg | 5,100 lb 2,313 kg |
| V-4600 | 21 to 22 ft | 1,200 lb 544 kg | 4,600 lb 2,087 kg | 5,800 lb 2,631 kg |
| V-5200 | 22 to 23 ft | 1,300 lb 590 kg | 5,200 lb 2,359 kg | 6,500 lb 2,948 kg |
| V-5800 | 23 to 24 ft | 1,400 lb 635 kg | 5,800 lb 2,631 kg | 7,200 lb 3,266 kg |
| V-6300 | 24 to 25 ft | 1,950 lb 885 kg | 6,300 lb 2,858 kg | 8,250 lb 3,742 kg |
| V-7400 | 25 to 26 ft | 2,000 lb 907 kg | 7,400 lb 3,357 kg | 9,400 lb 4,264 kg |
| V-7900 | 26 to 27 ft | 2,000 lb 907 kg | 7,900 lb 3,583 kg | 9,900 lb 4,491 kg |
EZ Loader lists the trailer weight as an average. EZ Loader, Custom welded tandem axle V-hull trailer specifications.
| Model | Type | Trailer weight | Carrying capacity | GVWR |
|---|---|---|---|---|
| WCE-900-40 | 1 PWC, steel | 210 lb 95 kg | 900 lb 408 kg | 1,110 lb 503 kg |
| WCE-1250-40 | 1 PWC, steel | 212 lb 96 kg | 1,250 lb 567 kg | 1,462 lb 663 kg |
| WCE-1250-46 | 1 PWC, steel | 229 lb 104 kg | 1,250 lb 567 kg | 1,479 lb 671 kg |
| WCE-1250-46-L | 1 PWC, steel | 255 lb 116 kg | 1,250 lb 567 kg | 1,505 lb 683 kg |
| WCE-1500-46 | 1 PWC, steel | 275 lb 125 kg | 1,500 lb 680 kg | 1,775 lb 805 kg |
| WC-1250-86 | 2 PWC, steel | 340 lb 154 kg | 1,250 lb 567 kg | 1,590 lb 721 kg |
| WC-2200-84 | 2 PWC, steel | 475 lb 215 kg | 2,200 lb 998 kg | 2,675 lb 1,213 kg |
| WC-2450-84 | 2 PWC, steel | 485 lb 220 kg | 2,450 lb 1,111 kg | 2,935 lb 1,331 kg |
| WC-2800-84-L | 2 PWC, steel | 531 lb 241 kg | 2,800 lb 1,270 kg | 3,331 lb 1,511 kg |
| WCA-1250-46-L | 1 PWC, aluminum | 250 lb 113 kg | 1,250 lb 567 kg | 1,500 lb 680 kg |
| WCA-2600-82 | 2 PWC, aluminum | 360 lb 163 kg | 2,600 lb 1,179 kg | 2,960 lb 1,343 kg |
Karavan Trailers, Personal watercraft trailers sell sheet.
Boat trailer capacity, GVWR and weight limit
Boat trailer makers name many trailers by their capacity (EZ Loader's V-4200 carries 4,200 lb), and capacity is not the same number as GVWR. On every row of both tables above, GVWR = carrying capacity + trailer weight. Federal rules define it this way: "Gross vehicle weight rating or GVWR means the value specified by the manufacturer as the loaded weight of a single vehicle." (49 CFR 571.3, Definitions). For a trailer, that includes the trailer itself.
- Weight limit: the loaded trailer, boat and all, must stay at or under the GVWR on its VIN plate. The calculator checks exactly that.
- Capacity: the boat as it sits, engine, fuel, water and gear included, must fit inside it. Sizing a trailer to the dry weight is the classic mistake.
- Margin: the BoatUS Foundation notes that some experts suggest loading a trailer to no more than 85% of its GVWR. That is a suggestion, not a rule.
- Axles and tires: each axle has its own rating (GAWR), and the tires have theirs. See how to read a trailer plate.
How much do fuel and water weigh?
Canada sets the density that retail fuel pumps must use when they correct volume for temperature: Measurement Canada's Bulletin V-18 gives gasoline 730 kg/m³ at 15 °C, within a published range of 640 to 780, and diesel 840 kg/m³. That is 6.09 lb per US gallon of gasoline (0.73 kg/L) and 7.01 lb per US gallon of diesel (0.84 kg/L). Real fuel moves with blend and temperature inside that range, which is why the BoatUS Foundation rounds gasoline to six pounds a gallon and Karavan sizes its jet ski trailers at 6.3. Water is 8.34 lb per US gallon (USGS Circular 1268, Conversion factors).
| Tank | Gasoline | Diesel | Fresh water |
|---|---|---|---|
| 6 US gal 23 L | 37 lb (17 kg) | 42 lb (19 kg) | 50 lb (23 kg) |
| 10 US gal 38 L | 61 lb (28 kg) | 70 lb (32 kg) | 83 lb (38 kg) |
| 25 US gal 95 L | 152 lb (69 kg) | 175 lb (79 kg) | 209 lb (95 kg) |
| 50 US gal 189 L | 305 lb (138 kg) | 351 lb (159 kg) | 417 lb (189 kg) |
| 80 US gal 303 L | 487 lb (221 kg) | 561 lb (254 kg) | 667 lb (303 kg) |
| 100 US gal 379 L | 609 lb (276 kg) | 701 lb (318 kg) | 834 lb (378 kg) |
How much tongue weight should a boat trailer have?
Boat trailer makers publish 5 to 10% of the total weight of boat, motor, gear and trailer, measured with the tongue level:
- MasterCraft, Knowledge Center: Trailer weight distribution: "It is extremely important that a minimum of five percent (5%) and a maximum of ten percent (10%) of the total weight on the trailer is on the trailer coupling ball when the tongue is parallel to the ground." Its example: a 3,000 lb rig carries 150 lb to 300 lb on the ball.
- Boatmate Trailers, Towing Safety: "Once loaded properly and secure the tongue weight of your trailer should be 5-10% of the total weight of your boat and trailer to ensure safe towing characteristics from the trailer."
- BoatUS Foundation, Boating Safety Study Guide: Transportation and Trailering: "Five to 10 percent of the total weight of the boat, motor, trailer, and gear should be on the trailer ball when the coupler is parallel to the ground."
That is lower than the general figure. Chevrolet gives 10 to 15% for a conventional ball hitch, and Honda's 2023 Pilot owner's manual lists 5 to 15% for boat trailers against 10 to 15% for other trailers. The calculator shows both bands.
All of these are manufacturer guidance, not law. No federal regulation in the US or Canada sets a tongue weight percentage. Your trailer's manual and your tow vehicle's manual decide, and a tongue scale tells you where you actually are. Too light and the trailer sways; too heavy and it eats your payload.
| Boat, motor, gear and trailer | Boat trailer, 5 to 10% | General, 10 to 15% |
|---|---|---|
| 1,000 lb (454 kg) | 50 to 100 lb | 100 to 150 lb |
| 1,500 lb (680 kg) | 75 to 150 lb | 150 to 225 lb |
| 2,000 lb (907 kg) | 100 to 200 lb | 200 to 300 lb |
| 3,000 lb (1,361 kg) | 150 to 300 lb | 300 to 450 lb |
| 4,000 lb (1,814 kg) | 200 to 400 lb | 400 to 600 lb |
| 5,000 lb (2,268 kg) | 250 to 500 lb | 500 to 750 lb |
| 6,000 lb (2,722 kg) | 300 to 600 lb | 600 to 900 lb |
| 8,000 lb (3,629 kg) | 400 to 800 lb | 800 to 1,200 lb |
| 10,000 lb (4,536 kg) | 500 to 1,000 lb | 1,000 to 1,500 lb |
Moving the boat forward or back on the trailer, shifting gear inside it, or adjusting the winch post changes the tongue weight. Measure it after any change, with the tongue weight calculator to check the result.
How much towing capacity do you need for a boat?
Three checks, in this order, and the first is the one most people skip:
- Payload. The tongue weight, plus everyone and everything in the vehicle, must fit inside its payload. See the payload calculator.
- Tow rating. The total towed weight, trailer included, must be inside the vehicle's maximum trailer weight. Boatmate goes further: the trailer's GVWR "should never exceed the tow rating of your vehicle".
- GCWR. Vehicle, people, cargo and trailer together must fit inside the gross combination rating.
That applies to a pontoon, a bass boat or a wake boat alike; only the numbers change. For a specific truck or SUV, the figures are on its door sticker and in its owner's manual, not on any website, and Can I tow this? runs all three checks at once. If you only know the VIN, here is what a VIN can and cannot tell you.
Do boat trailers need brakes?
Most of the rules on our trailer brakes page set one weight line for every trailer, boat trailers included, and the rule is the one where you drive. A few states write boat trailers in by name. Examples, read at source:
- Florida: Brakes on all wheels unless the trailer weighs 3,000 lb gross or less and its loaded weight is no more than 40 percent of the tow vehicle's gross weight. Fla. Stat. § 316.261(3)(a) and (4).
- Ontario: "Every trailer or semi-trailer having a gross weight of 1,360 kilograms or more shall be equipped with brakes adequate to stop and to hold the vehicle." Highway Traffic Act (Ontario), R.S.O. 1990, c. H.8, s. 64(5).
- Ohio: Brakes applied from the cab on trailers with an empty weight of 2,000 lb or more; boat trailers of 3,000 lb or more (built from 2008) need surge or electric brakes. Ohio Rev. Code § 4513.20(A)(4) and (5).
- Nebraska: Cabin (camping) trailers and boat trailers: brakes on at least two wheels from 3,000 lb gross loaded weight, and on every wheel from 6,500 lb; commercial trailers with over 10,000 lb carrying capacity need brakes on every wheel. Neb. Rev. Stat. § 60-6,246.
Weigh the trailer with the boat, engine, fuel and gear on it, then check your province or state on do I need trailer brakes? Boat trailers often use surge brakes; Honda's 2023 Pilot owner's manual notes they "are common for boat trailers, since the brakes will get wet".
Weight distribution and sway control on a boat trailer
A weight distribution hitch can fight with surge brakes, so ask the trailer maker before you fit one. Boatmate says it "does not advocate the use of WDH due to the adverse effects they can have on the surge brake systems found on most of our trailers", and to have a professional set one up if your vehicle requires it. Sway usually starts with tongue weight that is too light, so check that first.
Weigh it, then trust the scale
- Load the boat as you tow it: fuel, batteries, gear, and any water you leave in.
- Weigh the whole rig on a public scale, then the tow vehicle alone. The difference is the trailer, loaded.
- Measure tongue weight with a tongue scale, or weigh the vehicle with and without the trailer hitched and the trailer's wheels off the platform.
- Compare the trailer's loaded weight with its GVWR, and the tongue weight with your vehicle's limits.
Sources
Builders' and makers' spec pages, each opened on 2026-10-24.
- Tracker Boats, 2027 Bass Tracker Classic XL specifications: Bass Tracker Classic XL (16 ft 8 in aluminum fishing boat, sold as boat, motor and trailer): Average Dry Weight 780 lb (353.8 kg); Average Package Weight 1,705 lb (773.37 kg); portable fuel capacity 6 gal. https://www.trackerboats.com/bass/bass-tracker-classic-xl.html
- Boston Whaler, 170 Montauk specifications: Boston Whaler 170 Montauk (17 ft 4 in center console): Weight (dry, no engine) 1,700 lb; Weight (with std. engine, fuel and water) 2,254 lb; fuel capacity 25 gallons; maximum engine weight 410 lb. The standard package includes a galvanized trailer, whose weight the page does not give. https://www.bostonwhaler.com/us/en/boats/montauk/170-montauk
- Sun Tracker, 2027 Party Barge 20 DLX specifications: Sun Tracker Party Barge 20 DLX (21 ft 11 in pontoon): Average Dry Weight 2,080 lb (943.47 kg); Average Package Weight 3,745 lb (1,698.7 kg); fuel capacity 32.1 gal. The price excludes the optional tandem-axle trailer, and the page does not say what the package weight includes. https://www.suntrackerboats.com/recreational-pontoons/party-barge-20-dlx.html
- MasterCraft, XT22 specifications: MasterCraft XT22 (22 ft 4 in inboard wake boat): boat weight 5,485 lb (2,488 kg); fuel capacity 79 gal (299 L); ballast 3,500 lb. https://www.mastercraft.com/boats/xt22
- Sea-Doo, 2027 Spark specification sheet: Sea-Doo Spark personal watercraft: dry weight 437 lb (198 kg) for the Spark for 2 with the 60 hp engine and 452 lb (205 kg) for the Spark for 3 with the 90 hp engine; fuel capacity 7.9 US gal (30 L). https://sea-doo.brp.com/content/dam/global/en/sea-doo/my27/documents/specs-sheets/na/en/SEA-MY27-RecLite-Spark-Spec-EN-Page-LR.pdf
- Hobie, Hobie 16 specifications: Hobie 16 catamaran sailboat (16 ft 7 in): weight 320 lb (145 kg). https://www.hobie.com/sail/hobie-16
- EZ Loader, Custom welded tandem axle V-hull trailer specifications: Seven tandem-axle boat trailer models for 20 to 27 ft boats, each with carrying capacity, average trailer weight and GVWR. On every row GVWR equals carrying capacity plus trailer weight (V-4200: 4,200 + 900 = 5,100 lb), which is how a boat trailer's capacity and its GVWR relate. https://ezloader.com/custom-welded-boat-trailers/custom-steel-v-hull-trailers/tandem-axle-v-hull/
- Karavan Trailers, Personal watercraft trailers sell sheet: Eleven single and double jet ski (PWC) trailers with trailer weight, GVWR and carrying capacity. Karavan's own sizing formula counts fuel at 6.3 lb per gallon, a little above the retail standard density. https://www.karavantrailers.com/wp-content/uploads/2019/02/Karavan-Personal-Watercraft-Trailers.pdf
- Measurement Canada, Bulletin V-18 (rev. 8), Table 1: standard density values: "For the purposes of performing volume correction on liquids being sold or offered for sale to end consumers (retail sales), traders and devices shall use the appropriate standard density found in the second column of Table 1." The standard density Canada requires for retail fuel sales at 15 °C: gasoline (all grades) 730 kg/m³, within a range of 640 to 780 kg/m³; distillates including diesel 840 kg/m³. 730 kg/m³ is 0.73 kg per litre, which works out to 6.09 lb per US gallon; 840 kg/m³ is 7.01 lb per US gallon. Real fuel varies with grade, blend and temperature inside the published range. https://ised-isde.canada.ca/site/measurement-canada/en/laws-and-requirements/v-18-selection-volume-correction-factor-tables-and-standard-density-values-some-common-products
- USGS Circular 1268, Conversion factors: "1 gallon (gal) = 8.34 pounds" https://pubs.usgs.gov/circ/2004/circ1268/htdocs/text-conversion.html
- 49 CFR 571.3, Definitions: "Gross vehicle weight rating or GVWR means the value specified by the manufacturer as the loaded weight of a single vehicle." https://www.law.cornell.edu/cfr/text/49/571.3
- MasterCraft, Knowledge Center: Trailer weight distribution: A boat builder's own tongue weight band for its trailers: 5 to 10 percent of the gross weight of trailer, boat and gear, with the worked example of a 3,000 lb rig carrying 150 to 300 lb on the ball. MasterCraft also says to check the tow vehicle owner's manual. Manufacturer guidance. https://www.mastercraft.com/knowledge-center/trailer-weight-distribution/
- Boatmate Trailers, Towing Safety: A boat trailer maker's guidance: 5 to 10 percent tongue weight; the trailer's GVWR "should never exceed the tow rating of your vehicle"; adding ballast to the boat while it is on the trailer, or excess cargo, can exceed the trailer's GVWR; and Boatmate "does not advocate the use of WDH due to the adverse effects they can have on the surge brake systems found on most of our trailers". Manufacturer guidance. https://www.boatmatetrailers.com/towing_safety.php
- BoatUS Foundation, Boating Safety Study Guide: Transportation and Trailering: Boating-safety guidance: 5 to 10 percent of the total weight on the ball; GVWR has to cover the boat, engine, fuel at about six pounds per gallon, water and gear; some experts suggest loading the trailer to no more than 85 percent of its GVWR; a winch should be rated to pull at least half the combined weight of boat, motor and gear. Guidance, not law. https://www.boatus.org/study-guide/planning/transportation
- Honda, 2023 Pilot Owner's Manual: Towing Preparation: A tow vehicle maker that publishes a separate tongue load band for boat trailers (5 to 15 percent) from other trailers (10 to 15 percent), and notes that surge brakes "are common for boat trailers, since the brakes will get wet". Shown as one example of why the vehicle's own manual decides; other makers publish other figures. http://techinfo.honda.com/rjanisis/pubs/OM/AH/AT902323IOM/enu/details/131247047-11096.html
- Chevrolet, 2026 Trailering Guide, p. 8: 10 to 15 percent of loaded trailer weight for a conventional ball hitch, and 15 to 25 percent for gooseneck and fifth wheel. The same page adds that when towing the maximum trailer weight, the maximum tongue weight is 10% for conventional trailers. Manufacturer guidance. https://www.chevrolet.com/content/dam/chevrolet/na/us/english/index/trucks/trailering-and-towing/news/v2/CH-CAT-GEN-TRBRND020_2026%20Chevrolet%20Trailering%20Guidev2.pdf
- Fla. Stat. § 316.261(3)(a) and (4): Florida: Brakes on all wheels unless the trailer weighs 3,000 lb gross or less and its loaded weight is no more than 40 percent of the tow vehicle's gross weight. Breakaway: Trailers over 3,000 lb gross need brakes that apply automatically on breakaway and stay on for at least 15 minutes. http://www.leg.state.fl.us/statutes/index.cfm?App_mode=Display_Statute&URL=0300-0399/0316/Sections/0316.261.html
- Highway Traffic Act (Ontario), R.S.O. 1990, c. H.8, s. 64(5): Ontario's line is 1,360 kg or more, and s. 1(1) defines gross weight as "the combined weight of vehicle and load", so it is the loaded trailer. The section does not specify the type of brake or which wheels. https://www.ontario.ca/laws/statute/90h08
- Ohio Rev. Code § 4513.20(A)(4) and (5): Ohio: Brakes applied from the cab on trailers with an empty weight of 2,000 lb or more; boat trailers of 3,000 lb or more (built from 2008) need surge or electric brakes. Breakaway: Required on the same trailers: brakes must apply automatically on breakaway. Measured on empty weight, not loaded weight. Manufactured homes and travel trailers built from 2001 follow the same 2,000 lb empty-weight rule. https://codes.ohio.gov/ohio-revised-code/section-4513.20
- Neb. Rev. Stat. § 60-6,246: Nebraska: Cabin (camping) trailers and boat trailers: brakes on at least two wheels from 3,000 lb gross loaded weight, and on every wheel from 6,500 lb; commercial trailers with over 10,000 lb carrying capacity need brakes on every wheel. Breakaway: Cabin and boat trailers that must have brakes need a breakaway, surge, or impulse switch. The 3,000 lb rule names cabin trailers and recreational (boat) trailers only; utility trailers are covered for safety chains but not by a brake weight. https://nebraskalegislature.gov/laws/statutes.php?statute=60-6,246
Fuel weights, totals, margins and tongue weight bands on this page are calculated from the figures above. Builders revise specs every model year and options change weight; check the current spec sheet for your boat.