Stair Calculator
Rise, run, riser count + stringer length
Visual guide
Stair measurement guide
ATotal rise2.6 m
BTotal run3 m
EStringer3.97 m
The whole stair, with total rise, total run and stringer shown as separate measurements.
Flight
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mm
Reading 2600 mm
mm
Reading 3000 mm
mm
UK Doc K max 220mm domestic, 190mm comfortable
Results
Risers
14
Treads
13
Riser height185.7 mm (7.31 in)
Going / tread230.8 mm (9.09 in)
2R + G602 mm — within selected threshold
Stringer length3.97 m
Pitch38.8°
Doc K private stair (indicative)✓ inside the usual limits — confirm against the current document
Suggested Materials
Stringer (treated softwood, 32mm × 250mm)
Cut to ~4.17 m allow 200mm
2 pc
Tread board (PSE pine, 261mm)
13 pc
Riser board (PSE pine, 186mm)
14 pc
Stair brackets / glue blocks
52 pc
Estimates use standard UK trade rules of thumb. Always check the bag/spec on the day.