Determine rafter, hip, and ridge lengths quickly. Improve precision and speed for your roofing projects today.
| Length (ft) | Width (ft) | Pitch | Common Rafter | Hip Rafter | Ridge |
|---|---|---|---|---|---|
| 30 | 20 | 6 | 10.44 | 18.52 | 10 |
| 40 | 25 | 7 | 14.69 | 24.35 | 15 |
Common Rafter Length = sqrt((Width/2)^2 + (Width/2 * Pitch/12)^2)
Hip Rafter Length = sqrt((Length/2)^2 + (Width/2)^2) * sqrt(1 + (Pitch/12)^2)
Ridge Length = Length - Width
Enter your building length, width, and roof pitch in rise/run format. Click calculate. Results show common rafter, hip rafter, and ridge lengths. Use these measurements for cutting and framing accurately.
1. What units are used? All dimensions are in feet. Roof pitch is rise over 12 run.
2. Can I use decimals? Yes, input decimals for precise measurements.
3. Does it include overhang? No, overhang is not included. Add separately.
4. Is material estimation included? No, this tool calculates lengths only.
5. Can I use metric units? No, currently only feet are supported.
6. How accurate is the calculation? It gives geometric calculation. Allow for cutting tolerances.
7. Can I calculate for uneven pitches? No, pitch must be consistent across roof.
8. Is it suitable for large roofs? Yes, for any rectangular hip roof dimension.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.