Ladder Angle: 4:1 Safety

Instantly find the safe 4:1 angle for any ladder height — no math needed.

Set your ladder at the safe 1-in-4 angle every time. Ladder Angle turns your phone into a live inclinometer and a quick calculator, so you climb with confidence on the worksite or at home.

Leaning-ladder accidents almost always come down to the wrong angle — too steep and it tips back, too shallow and the feet slide out. This tool makes the right setup obvious in seconds.

WHAT YOU GET • Live inclinometer — rest your phone on the stile and read the real angle; it turns green inside the 73–78 safe zone • 4:1 angle calculator — enter your height or base distance in metres or feet and get the correct placement instantly • Safe-setup checklist — a pre-climb routine you tick off on site: inspect, level, set the angle, extend above the edge, secure and climb • Three points of contact and belt-buckle guidance built in • Ladder duty ratings (Type IAA to III) so you match the ladder to the load • Save your common setups and reopen them in a tap • Works fully offline — no account, no ads, no tracking

HOW IT WORKS

1. Measure — enter your reach, or rest the phone on the ladder stile
2. Check — see the live angle and a clear safe or adjust verdict
3. Climb — follow the checklist and the 1-in-4 rule with confidence

BACKED BY THE STANDARDS The 1-in-4 rule (about 75) reflects HSE guidance and the EN 131 ladder standard. A quick reference is built into the app.

FULL ACCESS Full access to the inclinometer, calculator, setup guide and saved setups is unlocked with a weekly or yearly plan, or a one-time lifetime purchase.

Set it right, climb safe.

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