Specialized Equipment & Sizing Utilities

Zero fluff, no-login engineering calculators designed for Field Mechanics, Woodworkers, RVers, Fabricators and DIY Projects.

🔍
Showing all tools

🚛 Towing, RV, 4x4 & Marine Sizing

RVs & Pickups

5th Wheel Cab Clearance Matcher

Calculate 90° jackknife turning clearance on short bed trucks (5.5' and 6.5'), required slider travel, and kingpin payload weight limits.

Launch Calculator →
Travel Trailers

WD Hitch & Tongue Weight Sizer

Determine exact 10%–15% tongue weight windows, verify truck cargo payload reserves, and select matching weight distribution spring bars.

Launch Calculator →
Marine & Boating

Boat Propeller Pitch, Gear Ratio & Slip Sizer

Calculate theoretical zero-slip speed, actual slip percentage, hull efficiency, and exact pitch steps to dial in WOT engine RPM.

Launch Calculator →
4x4 & Overland

Off-Road Recovery Winch & Snatch Block Sizer

Calculate mud mire resistance, steep incline gradient pull, outer drum layer torque loss, and snatch block Working Load Limits (WLL).

Launch Calculator →
Marine & Cruising

Boat Anchor Holding, Chain Rode & Windlass Sizer

Calculate ABYC 30-knot and 42-knot storm windage drag, recommended anchor weights (lbs/kg), 5:1/7:1 catenary chain rode, and electric windlass motor pull ratings.

Launch Calculator →
EFI & Performance

Fuel Injector cc & In-Tank Pump LPH Sizer

Calculate required fuel injector flow rates (cc/min & lb/hr), peak injector duty cycles, E85 ethanol volume multipliers, and in-tank high-pressure fuel pump LPH ratings.

Launch Calculator →
Marine & Hydrodynamics

Boat Trim Tab Dimensions & Actuator Sizer

Calculate boat trim tab plane sizing (Span × Chord), deadrise lift correction, high-speed parasitic drag optimization, and electric actuator specifications.

Launch Calculator →

⚡ Power, Water & Agricultural Systems

Backup Power

Standby Generator & Transfer Switch Sizer

Calculate central A/C compressor LRA starting surge, soft-starter mitigation, continuous running kW, and 30A vs. 50A inlet box requirements.

Launch Calculator →
Homestead Water

Solar Submersible Well Pump & PV Sizer

Compute Total Dynamic Head (TDH), Hazen-Williams pipe friction loss, required GPM flow, DC bus voltage, and solar array wattage footprints.

Launch Calculator →
Irrigation & Lawn

Lawn Sprinkler Zone Flow & Friction Sizer

Convert bucket tests into usable GPM, calculate pipe friction pressure drop (PSI), check water hammer limits, and size head counts per zone.

Launch Calculator →
Mobile Lithium Power

Alternator DC-to-DC Charger & LiFePO4 Sizer

Calculate maximum safe alternator thermal charging amps, driving recharge hours for LiFePO4 house banks, and required AWG wire and ANL fuse sizes.

Launch Calculator →
Ranch & Livestock

Electric Fence Energizer (Joules) & Ground Sizer

Determine required Output Joules for multi-wire perimeters, heavy wet weed loads, livestock coat shock voltage (kV), and 6-ft ground rod counts.

Launch Calculator →
Farm & Livestock

Barn Ventilation CFM & Intake Louver Sizer

Calculate seasonal livestock ventilation CFM, summer heat abatement ACH, winter moisture exchange, fan package diameters, and intake louver Net Free Area.

Launch Calculator →
Off-Grid LP Gas

Propane Tank Winter Vaporization & 2-Stage Regulator Sizer

Calculate liquid propane vaporization limits down to -20°F at 20% fill, prevent tankless heater freeze-outs, and size 2-stage regulators and CSST gas lines.

Launch Calculator →
Solar PV Sizing

Solar MPPT Sub-Zero String Voltage (Voc) Sizer

Calculate cold-temperature Voc voltage spikes down to sub-zero winter extremes, max series panel count per string, and charge controller overvoltage safety margins.

Launch Calculator →
Hydronics & Heating

Hydronic Radiant Floor Heating & PEX Loop Sizer

Calculate room heat loss BTU/hr, required PEX tubing loop lengths and spacing, manifold circuit counts, and circulation pump flow rate (GPM) and head loss.

Launch Calculator →
Pond & Aeration

Acreage Pond Aeration & Bottom-Diffuser Sizer

Calculate pond surface acreage, water volume, required CFM airflow by depth, and bottom diffuser plate counts. Size rocking piston air compressors, weighted sinking airline lengths, and friction pressure loss to prevent fish kill.

Launch Calculator →

⚙️ Fabrication, Machinery & PC Cooling

Hydraulics

Hydraulic Ram Force & Pump GPM Sizer

Size log splitter rams and shop presses: calculate required bore diameter for target tonnage, cycle extension times, and engine shaft HP.

Launch Calculator →
Woodworking

Cyclone Dust CFM & Static Pressure (SP)

Calculate ACGIH machine port capture CFM, spiral duct friction loss (in. WG), and required cyclone motor impeller horsepower.

Launch Calculator →
CNC Routing

Desktop CNC Speeds, Feeds & Chip Load

Calculate optimal feed rate (IPM), plunge rate, router dial RPM, depth of cut, and chip load tailored for desktop CNC rigidity limits.

Launch Calculator →
Custom PC Hardware

Custom PC Water Cooling Radiator & Pump Sizer

Calculate CPU/GPU thermal load (Watts), required copper radiator surface area at a 10°C Delta-T, fan static pressure, and D5 vs. DDC pump head.

Launch Calculator →
Sauna & Electrical

Sauna Electric Heater kW & Rock Mass Sizer

Calculate Finnish thermal cubic foot adjustments for glass and tile, electric heater kW, rock stone mass, 240V breaker wiring, and bench safety clearance.

Launch Calculator →
Garage Door Hardware

Garage Door Torsion Spring Wire & Cycle Sizer

Calculate exact garage door torsion spring wire diameter, active coil length, IPPT balance rating, installation quarter-turns, and 10k/25k/50k cycle upgrades.

Launch Calculator →
Shop Pneumatics

Air Compressor CFM, Tank & Duty Cycle Sizer

Calculate continuous CFM delivery at 90 PSI, 60/80-gallon tank buffer storage, true motor horsepower, and 1-stage vs. 2-stage pump duty ratings.

Launch Calculator →
Optics & Cinema

Projector Throw Distance & Screen Gain Sizer

Calculate optical lens throw ratio, image width and height, screen brightness in Foot-Lamberts (fL) and nits, minimum ANSI lumens, and ALR screen gain matching.

Launch Calculator →
Turbo & Engine

Turbo Compressor Map & Pressure Ratio Sizer

Calculate engine mass airflow (lbs/min), required boost gauge pressure, compressor pressure ratio (PR), and matched turbocharger inducer/exducer millimeter frame sizes.

Launch Calculator →
Professional Painting

Airless Paint Sprayer Tip Sizing & Fan Selector

Select your coating viscosity and desired fan width to determine the exact 3-digit Graco/Titan spray tip code, orifice size in thousandths of an inch, and verify whether your airless sprayer pump GPM capacity supports the tip.

Launch Calculator →
Spa & Heating

Hot Tub Heat-Up Time, kW & GFCI Sizer

Calculate thermal heat-up hours from hose fill, hourly temperature rise rate, winter ambient heat loss, 120V vs. 240V heater kW, and outdoor GFCI disconnect electrical specs.

Launch Calculator →

🛠️ Trade, Commercial & Equipment Maintenance

Heavy Equipment

Skid Steer Fluid & Filter Reference

Quick lookup for Bobcat, Cat, Kubota, and John Deere diesel track loaders: oil capacities and cross-referenced Wix/Baldwin part codes.

Launch Directory →
HVAC/R Compliance

EPA 608 Annualized Leak Rate Engine

Determine statutory Clean Air Act leak trigger thresholds (10%, 20%, 30%), calculate 30-day deadlines, and export printable logs.

Launch Calculator →
Commercial Beverage

Draft Beer Glycol Chiller BTU & Trunk Line Sizer

Calculate insulated python trunk line heat gain (BTU/hr), dispensing tower thermal load, required glycol power pack HP, and bath reservoir size.

Launch Calculator →
Chimney & Heating

Wood & Pellet Stove Chimney Draft & Height Sizer

Calculate natural thermal stack draft pressure, NFPA 211 3-2-10 roof height clearances, stainless steel flue liner sizing, and pellet stove EVL pipe diameters.

Launch Calculator →
HVAC & Heat Pumps

Multi-Zone Mini-Split HVAC & Line-Set Sizer

Calculate multi-room heating and cooling BTU loads, total condenser tonnage, and required liquid and suction line-set diameters. Determine total equivalent line-set run length, factory pre-charge limits, and additional R410A/R32 refrigerant charge weight.

Launch Calculator →
E-Commerce & Feeds

Dropshipping & Merchant Feed Diagnostic Tool

Scan XML and CSV product feeds in real time to flag missing GTINs, invalid ISO currency prices, shipping weight gaps, and Google Merchant Center disapprovals.

Launch Calculator →
Warehouse & Inventory

Warehouse Barcode & Bin Label Sheet Generator

Generate scannable ISO Code 128B vector barcodes, sequential rack bin locations, and SKU sheets formatted for Avery 5160/5163 laser labels and thermal rolls.

Launch Calculator →
Water Treatment

Water Softener Grain Capacity & Metered Valve Sizer

Calculate required ion-exchange grain capacity, clear-water iron and manganese compensation, resin volume (cu ft), salt efficiency, and digital metered control valve sizing.

Launch Calculator →
Freelance & Contracts

Freelancer Dispute & Retainer Escrow Calculator

Calculate upfront retainer deposits, milestone escrow splits, statutory overdue invoice interest, and generate copy-paste scope creep & IP holdback contract clauses.

Launch Calculator →
💬 Feedback & Ideas