Free motocross jump calculator

Stop guessing.
Build it right.

Real physics. Accurate construction specs. Know where you'll land before a single shovel hits the dirt.

Open the calculator ↓ How it works
4+
Jump types
100%
Physics-based
0$
Always free
4+
Jump types
Double, tabletop, step-up, step-down
<1s
Live update
Every slider recalculates instantly
4
Stakes placed
Exact ground distances from the jump toe
0$
Always free
No account, no ads, works offline
⚡
Live trajectory
The arc updates instantly as you move any slider. See exactly where you'll land at your speed before anything is built.
📐
Stake placement
Four ground stakes with exact distances from the jump toe — toe, lip, knuckle, landing — ready to mark on site.
🚚
Dirt volume
Cubic yards and truck load estimates for your exact dimensions so you order the right amount before you start.
🛡️
Safety built in
Safe speed gauge, instant landing warnings, and consistent slope enforcement — no kicker geometry, ever.
Jump calculator

Design your jump

Adjust the sliders — the profile, trajectory, and all specs update instantly.

Profile view · live trajectory
Takeoff
Lip height3 ft
Beginner 1–3 ft · Intermediate 3–6 ft · Advanced 6–10 ft
Takeoff slope18° — 3.1:1
Beginner 10–16° · Intermediate 16–22° · Advanced 22–30°
Gap & Landing
Gap (lip to knuckle)20 ft
Beginner 5–20 ft · Intermediate 20–40 ft · Pro 40–70 ft
Landing height offset0 ft
Negative = step-down · zero = double · positive = step-up
Rider, Landing & Width
Rider speed25 mph
Backyard 10–35 mph · Track 35–55 mph
Landing slope18° — 3.1:1
Match or slightly shallower than takeoff
Jump width20 ft
Used for dirt volume estimate only
Peak height
—
ft above lip
Distance in air
—
ft horizontal
Air time
—
seconds
Landing
—
status
Speed safety gauge
Takeoff mound
—
cubic yards
Landing mound
—
cubic yards
Total dirt
—
cubic yards
⚠ Trajectory cannot reach landing — gap too large for this speed and slope.
⚠ Short — rider lands before the knuckle. Increase speed or reduce gap.
⚠ Long — rider overshoots. Reduce speed or increase gap.
✓ Trajectory looks good — rider lands on the slope.
✓ Rider lands on the tabletop — safe roll-out.
Link copied —
Saved jumps
How it works

From slider to shovel

1
Set your jump shape
Choose your jump type — double, tabletop, step-up, or step-down. Dial in lip height, takeoff slope, gap distance, and landing slope. The profile redraws in real time.
2
Verify the trajectory
The red dashed arc shows exactly where a rider will travel at your speed. The landing dot turns green when it's on the slope, amber when short or long.
3
Check the speed gauge
Every jump shape has a speed window where it performs safely. Dial your approach speed until the needle sits in the green zone before you break ground.
4
Print and build
Hit Print Spec Sheet — you get a full construction document with the profile diagram, trajectory arc, stake placements, slopes, dirt volumes, and safe speed range. Take it to the site.
Safety

Built-in safety checks

Every output is designed to help you make better decisions before any dirt moves.

📏
No kickers
The calculator enforces a straight, consistent slope from toe to lip. An abrupt angle change at the top — a kicker — is one of the leading causes of crashes on poorly built jumps.
🎯
Landing zone check
The physics engine calculates the exact landing point for your speed. A warning fires immediately if the trajectory misses the slope — before you start building.
⚡
Safe speed range
Every jump shape has a speed window. The gauge shows your minimum and maximum speeds so riders know exactly what this jump was designed for.
⚠️
Always verify on site
This tool assumes flat ground and standard projectile physics. Real terrain, soil, and technique all affect the result. Verify on site and always start slow.

Ready to build your jump?

Free, no account needed, works in any browser or on your phone.

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