Trappkalkylator
Design stairs, calculate riser height, tread depth, stringer length, angle, and check building code compliance. 3 calculation modes with step-by-step solutions.
Kalkylera
Select a calculation type, enter your measurements, and click Calculate to see stair dimensions, stringer length, and code compliance with step-by-step solutions.
Resultat
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Code Compliance
Steg-för-steg lösning
Komplett användarhandbok
What is the Stair Calculator?
The Stair Calculator helps you design safe, code-compliant stairs. Enter the total rise (floor-to-floor height), and it calculates the number of risers, riser height, tread depth, total run, stringer length, and angle — all checked against building codes (IRC/IBC).
3 Calculation Modes
Design
Total stigning → stigare, stighöjd, slitbana, löpning, stringer.
Riser & Tread
Givet R, T, n → total stigning, löpning, stringer.
Stringer
Rise + run → stringer längd, vinkel.
Byggnadsnormer
| Parameter | Räckvidd | Ideal |
|---|---|---|
| Riser Höjd | 4–7.75" | 7" |
| Mönsterdjup | 10–14" | 11" |
| 2R + T Formula | 24–25" | 24.5" |
| Max Rise mellan landningarna | 12 ft | — |
Trappterminologi
📏 Riser — vertical face of the step
🦶 Trampa — horizontal surface you step on
📐 Stringer — diagonal stödbalk under stegen
⬆️ Total uppgång — floor-to-floor vertical height
➡️ Total körning — horizontal distance from top to bottom
Vanliga dimensioner
🏠 Residential: 7" riser, 11" tread (2R+T = 25)
🏢 Commercial: 6.5" riser, 12" tread (2R+T = 25)
🪜 Steep: 7.5" riser, 10" tread (2R+T = 25)
🚶 Gentle: 6" riser, 13" tread (2R+T = 25)
Viktiga anmärkningar
- All risers must be uniform height (max ⅜" variation).
- Kontrollera lokala byggregler – kraven varierar beroende på jurisdiktion.
- Minsta höjdhöjd: 6 fot 8 tum (80 tum).
- Ledstänger krävs på minst en sida för 4+ stigare.