Free 4x4 Calculators & Tools
17 free tools to plan your build, fit your tires, and dial in your rig, before you spend a dollar.
Match Me
Answer a few questions, get a recommendation
Overland Moneyball Finder
Answer 12 questions and get matched with the best-value overland vehicle from 25+ trucks, SUVs, and crossovers. Transparent scoring with build plans.
Trail Matchmaker
6 quick questions to match you with off-road trails based on your skill level, rig specs, and adventure style.
Campground Matchmaker
8 questions to search 7,400+ campgrounds, including National Parks, for your perfect match. Scored on budget, amenities, and style.
Shock Finder Quiz
4 questions to get personalized shock recommendations for Wrangler, Gladiator, 4Runner, Tacoma, Bronco, F-150, Silverado, or RAM.
Calculate
Number-crunchers for fitment, ratios, and impact
Tire Size Calculator
Compare tire sizes side-by-side. Calculate diameter, width, sidewall, circumference, and the exact difference between current and new tires.
Gear Ratio Calculator
Find the optimal gear ratio for your tire size to maintain power and efficiency. Get re-gearing recommendations after upsizing.
Wheel Fitment Calculator
Calculate offset, backspacing, and overall fitment before you buy. Visualize how different specs affect stance and clearance.
Bolt Pattern Lookup
Find the exact wheel bolt pattern (PCD), hub bore, and lug specs for your truck, Jeep, or SUV. Search by year, make, and model.
MPG Impact Calculator
Estimate how bigger tires affect fuel economy. See MPG loss for 33s, 35s, or 37s and the annual cost impact.
Speedometer Calibrator
Calculate exact speedometer error after bigger tires. Get correction values and compare tuner vs calibrator vs dealer reflash.
Plan Your Build
Phased budgets, loadouts, and unlock paths
Build Budget Planner
Pick your vehicle, select mods across 9 categories, and get a phased build plan with realistic cost estimates.
Lift Cost Estimator
The real cost of lifting your truck or Jeep, parts, labor, alignment, and the extras people forget. Budget, mid, and premium tiers.
Gear Loadout Builder
Pick your vehicle, select gear across recovery, camping, navigation, and safety, and get a sharable loadout with price ranges.
One Mod Away
See which trails your rig can handle today, and which single upgrade unlocks the most new adventures. Powered by your Garage profile.
Payload Calculator
How much weight can your rig actually carry? Add passengers, build mods, fuel, and tongue weight, then see GVWR margin and per-axle load.
On the Trail
Field tools you'll actually use at the trailhead
Air Down Calculator
Ideal tire pressure for sand, mud, rocks, and snow. Contact patch gains, bead risk warnings, and re-inflation reminders.
Recovery Gear Checker
Get a prioritized recovery kit by vehicle weight, terrain, remoteness, and solo or group travel. Load-rating math shown, no product links.
Need More Help?
Check out our in-depth guides for detailed explanations and expert recommendations.