The RV leveling guide calculates how high to stack leveling blocks based on your campsite's slope and tire size. Getting your RV level protects your refrigerator, improves sleep quality, and prevents drainage issues.
Slope & Tire Information
Use phone level app to measure. 3° is typical campsite slope.
Center-to-center tire width. Most RVs: 88–102 inches.
How to Use the RV Leveling Guide
The RV leveling guide takes the guesswork out of leveling blocks — no more trial and error stacking blocks while your partner says "a little more, a little less." Measure your slope once, enter it here, and stack the exact number of blocks needed.
Step 1: Measure the slope before pulling in
Use your phone's level app to measure the slope of the campsite ground before positioning your RV. Walk to where the low-side wheels will sit, place your phone flat, and record the angle. This saves time versus measuring after you're already parked.
Step 2: Place blocks before pulling onto site
Stack your calculated number of blocks where the low-side wheels will stop. Pull forward slowly while someone guides you with a hand signal for when to stop. The RV should be level or slightly tilting toward the direction that makes it easier to finish leveling with the tongue jack.
Step 3: Verify with interior level
Check your built-in bubble level or phone app from inside after positioning. A spirit level placed on your RV countertop gives a more accurate reading than a digital level on the exterior. Aim for within 1/2 inch side-to-side and 1 inch front-to-back for refrigerator safety.
Frequently Asked Questions
Is this RV leveling guide free?
Yes, completely free. All calculations run locally with no data transmitted.
How do I measure my campsite slope?
Use your smartphone's built-in level app (Compass or Level on iPhone; Level Bubble on Android) placed on a flat surface of your RV. The reading in degrees is your slope. Alternatively, many RV apps have level features, and a simple bubble level gives approximate readings.
How much slope can an RV handle?
Most RVs can level from a 5–6 degree slope (roughly 10% grade). Beyond that, you need multiple stacks of leveling blocks or a more level spot. Refrigerators require leveling within 3 degrees side-to-side and 6 degrees front-to-back to run properly. Absorption fridges are especially sensitive to being off-level.
What are the standard leveling block heights?
Lynx leveling blocks are 3/4 inch thick each. FaktorBlox and Camco leveling blocks vary from 3/4 to 1 inch per layer. Most manufacturers rate their blocks for stacking up to 6–8 inches total. Check your specific block manufacturer's stacking limit for safety.
Should I level side-to-side or front-to-back first?
Level side-to-side first using leveling blocks under the low-side wheels. Then use your tongue jack (trailer) or front leveling jacks (motorhome) to level front-to-back. Getting side-to-side level first is critical — adjusting front-to-back afterwards doesn't change the side-to-side reading.
Do I need to unhitch to level my trailer?
For side-to-side leveling, unhitch after pulling onto blocks, not before. Drive onto blocks while still hitched to your tow vehicle for proper weight distribution. Then unhitch, extend stabilizer jacks, and level front-to-back with the tongue jack. This sequence prevents tongue sway.