You've just observed a support worker performing a repeated two-person transfer that looked awkward through the shoulders and back — before recommending changes, you want a structured score to back up your observation.
Score A = Table A[Neck,Trunk,Legs] + Force
Score B = Table B[Upper arm,Lower arm,Wrist] + Coupling
Final REBA = Table C[Score A,Score B] + Activity score
REBA scores Group A (trunk, neck, legs) and Group B (arms, wrist) separately, adds force/coupling adjustments, combines them via Table C, then adds an activity score for static/repetitive/unstable postures.
1 What this calculator does
Calculates a REBA (Rapid Entire Body Assessment) score — a structured ergonomic screening tool used to evaluate whole-body postural risk during manual handling and other physical tasks. Produces a numeric risk score, risk level and recommended action urgency, following the published Hignett & McAtamney (2000) method.
2 Formula & professional reasoning
Score A = REBA Table A [Neck, Trunk, Legs] + Force/Load score
Score B = REBA Table B [Upper arm, Lower arm, Wrist] + Coupling score
Final REBA score = REBA Table C [Score A, Score B] + Activity score
REBA was developed specifically for the unpredictable, dynamic postures common in healthcare and service industries (unlike RULA, which was designed for seated, static desk-based tasks). It separates the body into Group A (trunk, neck, legs — the load-bearing core) and Group B (arms and wrist — the manipulation segments), scores each against standard posture tables, then combines them through a lookup table (Table C) that reflects how combined postural strain compounds risk non-linearly. The activity score captures dynamic risk factors — static holding, high-frequency repetition, and rapid or unstable posture changes — that aren't captured by a single static posture snapshot.
3 Worked examples
⚠️ Illustrative example only — not clinical or professional instruction.
Score A = TableA[1][2-1][1-1]+0 = 2 | Score B = TableB[1][2-1][1-1]+0 = 1 | Table C[2][1] = 2 | Final = 2+0Score A = TableA[2][3][2]+1 ≈ 6 | Score B = TableB[2][3][2]+1 ≈ 6 | Table C[6][6] ≈ 8 | Final ≈ 8+1 = 9Score A = TableA[3][4][3]+2 ≈ 10 (capped) | Score B = TableB[2][5][3]+2 ≈ 10 (capped) | Table C[10][10] ≈ 12 | Final = 12+3 = 12 (max)4 Sanity check
5 Common errors
| Error | Cause | Consequence | Fix |
|---|---|---|---|
| Scoring an atypical or best-case posture | Choosing to assess a moment where posture looked good rather than the most awkward, most frequent, or most force-loaded posture in the task | Understates true risk and can lead to inappropriate 'no action needed' conclusions | Select the posture based on: most awkward posture, posture held longest, or posture under highest force — per the original REBA selection criteria |
| Averaging left and right side scores | Blending left/right side scores into a single combined figure | Masks asymmetric risk, which is common and clinically important in manual handling | Score each side independently and report/act on the higher (worse) score |
| Omitting the activity score | Only calculating Table C score and forgetting to add the activity score for static, repetitive or unstable postures | Understates the final REBA score, sometimes by several points | Always assess and add the activity score (0-3) as the final step — it is not optional |
| Treating REBA as a substitute for the official worksheet in high-stakes assessments | Relying solely on a simplified digital tool for formal WHS compliance documentation | May not capture nuanced posture descriptions or provide the audit trail some WHS processes require | Use this calculator for quick screening and education; complete the official REBA worksheet (or engage a qualified ergonomist) for formal workplace risk assessments and compliance records |
6 Reference & regulatory links
7 Professional workflow
Common tools used alongside this one: