45°

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Tap Start camera to enable the angle overlay.
Lines mark β = 0°, 30°, 45°, 60° from vertical · 0° = straight pull. Selected angle is shown in the centre.

Angle (β — from vertical · 0° = straight pull)

Sling lookup

Sling type

Attachment / hitch

Legs

Size

Working Load Limit

—t

Select sling and angle

Data transcribed from Lifting & Safety International AS load tables (EN 818-4, EN 13414-1, EN 1492-1/2). The on-camera overlay is a visual reference only. Always verify against the original manufacturer documentation. Angle β is measured from the vertical axis (EN-table convention). 0° = straight vertical pull, 30° = least spread, 60° = max permitted spread.

Wind load — vindtrykk

Pressure (kg/m²) = (m/s)² ÷ 16 · Force (kg) = pressure × area

Wind speed

m/s

Load height

Load width

Pressure — kg/m²

Exposed area — m²

Wind force on load — kg

Simplified estimate: q = v² ÷ 16 (kg/m²), force = q × h × w. Assumes a flat, fully exposed face perpendicular to the wind. Real loads with shape factors, gusts, or sheltered sides should be assessed against NS-EN 13001 / NS-EN 1991-1-4.

About this tool

LiftRightWay is a free, browser-based lifting calculator for riggers, crane operators and lifting supervisors. Pick a sling type, attachment, leg configuration and angle to get the WLL in tonnes, computed from published EN-table values × the configuration factor.

Chain slings — Grade 80 and Grade 100 (EN 818-4).
Wire rope slings — 6×19 / 6×36 / 8×36, grade 1770 (EN 13414-1).
Fibre slings — polyester, EN 1492 colour-coded (Violet 1 t → Orange 40 t).
Hitch types — straight, choked, U-lift / basket and basket 0–30°.
Multi-leg — 1 leg, 2 legs, 3 / 4 legs, plus asymmetric (rated as one-leg per EN tables).
Live camera overlay — reference lines at β = 0° (vertical/plumb), 30°, 45° and 60° from vertical. Capture a photo with the overlay and configuration burned in for lift-plan documentation.
Wind-load (vindtrykk) calculator — q = v² / 16 (kg/m²), force = q × area.

På norsk: løftekalkulator med stroppvinkel-overlay i kameraet, oppslag av WLL for kjettingstropp (EN 818-4), ståltaustropp (EN 13414-1) og fiberstropp (EN 1492), samt enkel beregning av vindtrykk på lasten.

A note on responsibility

This tool is provided as a helpful reference, not a substitute for qualified judgement. The person carrying out the lift is at all times responsible for the safety of the operation — including verifying the equipment, the rigging, the load and the conditions on site against the manufacturer's documentation and applicable regulations.

Every effort has been made to transcribe the lifting tables accurately, but the author of this site accepts no liability for errors, omissions or any consequences arising from the use of the figures shown here. When in doubt, always defer to the original manufacturer tables and a competent rigging supervisor.